gas mileage tuned KA24DE ECU'S 30 mpg?

[sillyvia13]

Wondering if anyone is interested in a tuned ecu for a ka24de?

Gas mileage will be increased! by leaning out under LOW loads 1/4 throttle under 3400 rpm
2 step, such as a bee r rev limiter is also on tune.
timing is adjusted...
many many extra mods tuned into ecu that you'll love...

I have this in my car and my friend is the tuner...
I am sharing this for many reasons...
1. help save money on gas when not killing tires.
2. performance mod on your car..we all like that! a JWT ecu is $500! for just a performance mod no gas savings at all...
3. I like t omake money is this will make sure I make a few bucks every now and again...NOT GONNA LIE!


What will happen.
I get your ecu. make sure it is good. ie run it in my car. and run consult on it. everything checks out....
I will send you MY ECU! knowing it is GOOD! SO NO PROBLEMS SAYING THIS DOESN"T WORK! I will make a video if I have too to show actual ecu...ROM TUNED!! with all above settings.
I am honest and will not send a bad ecu.

I will come up with a price soon enough, Just want to know if there is anyone who would like this...
I am sure it will pay itself off sooner than you think...gas prices changed from the time I started this thread til the time you read it...NO DOUBT!

lmk...

[1slowS13]

how big of an increase in mpg would it be?

[Silverbullet]

he claims 30mpg. So take 30 and subtract what your getting now and you have your answer.

[Oo_Skyline_oO]

I might be interested in this, pm me when you have price please

[BoostedCoupe]

Are you saying you can tune in a 2step? if so how is that? i would be down if the price isnt to high. good gas mileage + 2 step = win.

[sillyvia13]

he claims 30mpg. So take 30 and subtract what your getting now and you have your answer.


NO CLAIMS! MADE YET!!!!!!!!!
I HAVEN"T MADE A RUN TO SEE WHAT THEY ARE YET!!!!! but will be MUCH better!

2 step is for sure active tho...thats been on for a while!
many different things are added...when you hit gas in your ka it bogs first then goes...thats removed...hit gas and go now!

I am burning my chip noW! well see what I get for mpg...going for a 40 mile dirve...

[S13Boosts]

im down lmk.....i need more MPG!!!!!!!!!!!!!!!!

[GeneStarWindGSW]

$400 he said

im considering it, if it can be used on Turbo KA as well (future plans)

[pignose4life]

dont forget the single slammers!

[BAY240]

hmm... interested, but not quite sold on the product yet. you say it has a rev limiter, which i assume is an ignition cutoff, rather than a fuel cutoff? lol so it shoots flames like a bee*r revlimiter?.... and it elimintaes bogging under 1/4 throttle. hmmmm
Price?

[los_inc]

ya what about the SOHC bastards! -los

[zeitgeist]

i hope you mean 30 mpg city driving

[turbo2nr]

i get 26mpg on my boosted ka-t on a shitty safc tune i did my self. hehe, i think his tune may be more then capable of good gas milage just stay off boost and tune lean on partial throttle and itll be good, exactly what i did. lol

good luck intrested to see progress on this

[Croan]

im down. any waranty?

[beeracing s14]

ka consumes soooo much gas... that is for my automatic at least.

[s13pignose]

ka consumes soooo much gas... that is for my automatic at least.

I 2nd that:rant2: What about those who are auto, and only have small mods like bolt-ons such as myself? Or is this only for the sr and ka-t big timers lol

[mojos13]

Interested if it can be tuned for KA-T setup...lmk

[UsJdmTUner]

yep on KA-T as well and stock KA

[Def]

Your "tuner" friend doesn't sound like he knows what he's talking about. Leaning out the stock tune just a hair will get you slightly better gas mileage, but after that you start losing torque faster than you're reducing fuel consumption. It's pretty obvious if you have ever actually tried this out on a car, as you'll have the throttle opened about 10% more to maintain a 70 mph cruise in 5th with an AFR of 16.5:1 vs. an AFR of 15.0:1.


Sounds like a commercial post to me as well...

[punxva]

Your "tuner" friend doesn't sound like he knows what he's talking about. Leaning out the stock tune just a hair will get you slightly better gas mileage, but after that you start losing torque faster than you're reducing fuel consumption. It's pretty obvious if you have ever actually tried this out on a car, as you'll have the throttle opened about 10% more to maintain a 70 mph cruise in 5th with an AFR of 16.5:1 vs. an AFR of 15.0:1.


Sounds like a commercial post to me as well...

agreed unless this is tuned with a wideband and on a dyno to control variables there is no way for you to make that claim accurately , not to mention you seem to have negated the downfalls of running your car like this setup.

[waynehead05]

I'm interested to hear more info on this. Waiting...

[Oo_Skyline_oO]

shit man 400 bucks??a local shop will tune mine for 90 bucks

[Pank]

notice that the people falling for this are, for the most part, newbies.

and i highly doubt this "tune" will save 400 dollars in gas unless gas hits 30 dollars a gallon tomorrow, and you owned the car for 20 years.


also, if you're advertising, you have to pay to do that.
ya know

[xsparc]

a 2 step you say?? well i know the nissan code does not have this anywhere in it... so you rewrote to code to allow for it? i think not

[SuicidnS13]

Your "tuner" friend doesn't sound like he knows what he's talking about. Leaning out the stock tune just a hair will get you slightly better gas mileage, but after that you start losing torque faster than you're reducing fuel consumption. It's pretty obvious if you have ever actually tried this out on a car, as you'll have the throttle opened about 10% more to maintain a 70 mph cruise in 5th with an AFR of 16.5:1 vs. an AFR of 15.0:1.


Sounds like a commercial post to me as well...

Yup definately needs to be moved to some sort of selling forum. We dont "chat" about selling services. Or our own personal ecu's for cash and your ecu. No matter how good it runs it doesnt belong in general chat.

[S3t0S13]

Interested
just let me know

[GeneStarWindGSW]

$400 and he told me he'll take your ecu and burn the chip in your ECU and thats it.

ROM tuning he said it was.

i was hesitating to get it first, so i was like i'll wait till someone else gets it and tries it.

[okterrific]

as for a reference, even some OEM cars idle at 17-18:1, and at cruise you can go into the 16s/17s no problem under light load. I really don't think that much of a change would have an adverse effect on the torque/power of the car to the effect that the gas saving would be lost by having more throttle...

It is also most def. possible to insert a 2 step in the OEM code.... lol for anyone who doesn't think thats possible... its just ASM for goodness sake. You could put a traction control and other stuff in there if you really wanted.

just my 2 cents...

[bruinbear714]

I have the ultimate gas saver tool... its your right FOOT.

[sillyvia13]

So...
Went for a ride...
got 32 mpg in CITY! so highway would be more...

my car has 268,xxx miles.
na ka 24de.
either way...I can help if you wish
PM ME! for more info...
Sorry If I missed placed this in wrong forum...Just trying to help!
Russ.

[sillyvia13]

SIDE NOTE!
NO POWER LOSS WAS SEEN!
CAR WAS NORMAL! NO ADVERSE SIDE EFFECTS!
I WILL KEEP YOU UPDATED>>>

I am upset at govt and want to help everyone save a buck...
if price is too much...SORRY!
a bee r is $250 on ebay!
a gas saver tune is priceless...
ac fan turns on automagicly when car reaches 180 degrees...
many more extras...
I can look into ka24e's well see...probly need a ginnnnyyyy pig.?
if anyone in NH area wants to use the ecu to disprove me feel free...and have a second opinion thats not from me or my friends NO PROBLEM!
would love to meet some new peeps!

[MrChow]

hmm interesting...

I get atm 25/30 ish mpg. I would love to see the tune for this.

[BigVinnie]

NO CLAIMS! MADE YET!!!!!!!!!
I HAVEN"T MADE A RUN TO SEE WHAT THEY ARE YET!!!!! but will be MUCH better!

2 step is for sure active tho...thats been on for a while!
many different things are added...when you hit gas in your ka it bogs first then goes...thats removed...hit gas and go now!

I am burning my chip noW! well see what I get for mpg...going for a 40 mile dirve...

Hey if you can break my 28MPG SAFC tune with bolt on's I will buy you a beer. My engine makes a consistent 28MPG between 3500 and 4000RPM in fifth gear for consistent freeway driving. I can tell you right now using the restrictive G60 MAF you won't be making over 26MPG.

[Rusolena]

Is this for OBD1 or OBD2? I got a 97 so let me know if this works for me. Thanks

[BigVinnie]

Your "tuner" friend doesn't sound like he knows what he's talking about. Leaning out the stock tune just a hair will get you slightly better gas mileage, but after that you start losing torque faster than you're reducing fuel consumption. It's pretty obvious if you have ever actually tried this out on a car, as you'll have the throttle opened about 10% more to maintain a 70 mph cruise in 5th with an AFR of 16.5:1 vs. an AFR of 15.0:1.


Sounds like a commercial post to me as well...

Not only that but the leaner it gets the more response to knock and ping on the standard AKI fuel (91 AKI). Not to mention the higher knock goes the less ignition timing the engine receives. Timing should continue to advance in order not to hinder power. I smell poo poo in this thread.
You can achieve better gas mileage with iridium plugs better than some one could leaning out a tune under load, unless of course on an OBD1 ecu , closed loop disable is used.

[sillyvia13]

a 2 step you say?? well i know the nissan code does not have this anywhere in it... so you rewrote to code to allow for it? i think not


Code was not rewritten... it was made from scratch!!! lol...
and no negative things have happened or will!!!!!!PUNXA!

[Def]

as for a reference, even some OEM cars idle at 17-18:1, and at cruise you can go into the 16s/17s no problem under light load. I really don't think that much of a change would have an adverse effect on the torque/power of the car to the effect that the gas saving would be lost by having more throttle...

It is also most def. possible to insert a 2 step in the OEM code.... lol for anyone who doesn't think thats possible... its just ASM for goodness sake. You could put a traction control and other stuff in there if you really wanted.

just my 2 cents...

99.99999% of gas powered cars made in the past 20 years idle/cruise right around stoich(which is 14.6:1). Look at how a narrowband O2 sensor works and it should make sense.


I've been tuning cars for 3+ years now, and run through tons of tanks of 93 octane and E85. Not only do textbooks/Internal combustion engine theory agree that best gas mileage comes just lean of stoich(about 15.0-15.3), but my experiences mirror this.

30 mpg is probably possible on a KA if you on the highway almost all of a tank. I've gotten about 28-29 mpg with my SR with about 60-70% freeway driving, so it's possible, but no way that's your average driving.

[UNISA JECS]

So basically your adjusting the ECU's flaged target A/F ratio to something higher than 14.7 to 15.4 which if im correct is what the stock ECU aims for, that specific range 14.7 to 15.4.

[UNISA JECS]

Not only that but the leaner it gets the more response to knock and ping on the standard AKI fuel (91 AKI). Not to mention the higher knock goes the less ignition timing the engine receives. Timing should continue to advance in order not to hinder power. I smell poo poo in this thread.
You can achieve better gas mileage with iridium plugs better than some one could leaning out a tune under load, unless of course on an OBD1 ecu , closed loop disable is used.

I dont think being a little leaner while in vaccumm during sustained vacuum cruise condition is gonna hurt anything when in closed loop and im sure this would result in better gas milage.

[murda-c]

i got 32 mpg cruising down a mountain in pa at around 50 most of the way, lol.

[Def]

Not only that but the leaner it gets the more response to knock and ping on the standard AKI fuel (91 AKI). Not to mention the higher knock goes the less ignition timing the engine receives. Timing should continue to advance in order not to hinder power. I smell poo poo in this thread.
You can achieve better gas mileage with iridium plugs better than some one could leaning out a tune under load, unless of course on an OBD1 ecu , closed loop disable is used.

You don't have to worry about knock at low load. Timing retard is entirely dependent on what you put in the secondary maps or if you even use the knock control flag.

There can be too much timing advance as well, causing power loss.

Closed loop doesn't hurt gas mileage vs. open loop.

[Def]

I dont think being a little leaner while in vaccumm during sustained vacuum cruise condition is gonna hurt anything when in closed loop and im sure this would result in better gas milage.

No - beyond just lean of stoich you lose more power than you gain in reduced gas consumption.

As in your brake specific fuel consumption will go UP once you lean the engine out past a point, which is what dictates fuel efficiency(how much fuel it takes to generate a give amount of power).

The engineers that do calibrations(or "tunes") at OEMs are not idiots. If they could get an instant 20%+ increase in fuel consumption by just changing the AFR they would do it in an instant. Fact is, catalyst efficiency peaks right at stoich, so that's why they run it at stoich. There is a FEW PERCENT max fuel efficiency to be gained in leaning the mixture out a bit and playing with the timing to accommodate the slower burn rates. That's it - there's no magic 20%+ fuel efficiency tweak...

[S14DB]

What's the AFR and EGT on this tune?

[UNISA JECS]

No - beyond just lean of stoich you lose more power than you gain in reduced gas consumption.

As in your brake specific fuel consumption will go UP once you lean the engine out past a point, which is what dictates fuel efficiency(how much fuel it takes to generate a give amount of power).

The engineers that do calibrations(or "tunes") at OEMs are not idiots. If they could get an instant 20%+ increase in fuel consumption by just changing the AFR they would do it in an instant. Fact is, catalyst efficiency peaks right at stoich, so that's why they run it at stoich. There is a FEW PERCENT max fuel efficiency to be gained in leaning the mixture out a bit and playing with the timing to accommodate the slower burn rates. That's it - there's no magic 20%+ fuel efficiency tweak...

Well I thought that the whole reason for stoich (14.7:1) burn was to be enviormental friendly ("best spot for gas mileage and emissions"), because this is the point where HC and CO are both at minimal levels while also keeping down NOx.

Also what about the Honda lean burn engines that they used for increased gas milage where some run I believe in the 22:1 area of course im sure this requires special cat's for the increased NOx to comply with emissions and stuff but these things got ~45/51 mpg.

[Def]

HC and CO are at lower levels when really lean, and NOx doesn't peak until far leaner. Stoich is where a catalyst is most efficient though(theoretical lack of oxygen + the lowest HC/CO levels at that point).

Lean burn engines typically use some method to get at least a majority of the combustion area to be close to stoich and the rest super lean as a way of artificially dropping air used in the cycle. Combustion just doesn't work well that lean of stoich, so that's what all the lean burn engines fight with various strategies(stratified injection etc).

[mjjstang]

I dont know why this is a bad area to post. The guy wants to see if there is any interest in doing this, he is not peddling anything yet, and when he does, yes it would be the right thing to post elsewhere/ setup advertising status, etc. I know if I was about to commit to this, I would want to get the word out and gauge interest via a free forum for fellow enthusiasts.

Anyway, as I drive an explorer and have the 240 for summer weekends, I have often pondered reverting back to the 2.4 and do some crazy ass fuel save mods so I could laugh at the unstylish tree hugging metro/prius drivers (depending on economic status) and cruise in style. This would be the first thing I did if were getting those kind of miles.

However I think the price is a little stiff. Considering that enthalpy charged 500 for basically the same type of service its not bad, but still expensive for what it is I think.

[stinky_180]

would you and your friend like to share the bin file of this tune?

[UNISA JECS]

would you and your friend like to share the bin file of this tune?

me to :naughty:

[BigVinnie]

The whole idea of leaning out the ecu for better gas mileage is retarded IMO.
Honestly the focus should be more on drive train, if you want better MPG switch out to a diff with a 3.6:1 ~3.9:1 ratio. If it's slow add a cam and still get better gas mileage.
If you look at nissans newer engines the tunes move further away from stoich and more into rich as the compression ratios are higher in the newer engines, also making a tune leaner limits the life of the catylitic converter.
Nissan has focused more on drive train improvements such as CVT trainsmissions and taller gears.
Tuning too lean is like runing a car on ethanol... WHY?

[jskateborders]

well its easy to tune a ka for better gas milage, they are tuned unnecessarily rich from factory.

[beeracing s14]

i still have not heard anything what it can do to an auto. auto waste more than stick KA.

[BustedS13]

so 30mpg highway, right? that's REALLY not that impressive... i averaged 28mpg on a roadtrip down to the gulf a few years ago. you get that up to like 35 and people might be down.

[rudypoochris]

Here is a direct quote from JohnC at Hybridz.org regarding similar issues:

BMW did a lot of research in the early 1980s regarding proper engine design and driving technique for max fuel economy. A lot of that research is appropriate to this discussion.

Some of their findings:

1. Reducing engine rpm increases fuel economy via the reduction of friction losses.
2. Increasing throttle opening reduces pumping losses which increases fuel economy.
3. Steady state cruise can go as lean as 20 to 1 with proper engine management.
4. Gearing has a significant affect on fuel economy.

The result of these findings was the Eta engine series. They were designed to produce good low end torque, had internal friction reductions (light valve springs and oil ring tension, etc.), and had specially designed ECUs that went real lean at cruise.

Gearing was tall and the dash upshift light was programmed to get the driver into 5th or top gear as quickly as possible. The throttle control was also non-linear so the driver got larger throttle openings then normal with any resulting surge controlled through the ECU.

I personally think this tune is a bad idea in that your cats are not going to like it and you will probably run hot. Never mind the fact that your putting faith in someone over the internet you really don't know who really doesn't know your car. If it were tuned specifically to your vehicle and you knew exactly how lean and all that stuff, with option of a reburn if it messes stuff up, sure, go for it and experiment. In this case though its just too big of a risk imho. I would install an aftermarket EFI system to have flexibility over trying to crack this one.

Also, as noted above, I suspect much more gains will come from reduced rpms, gearing and short shifting (that means loading the engine at low RPMs, maybe 90% throttle, it is counter intuitive).

[kdashy]

as for a reference, even some OEM cars idle at 17-18:1, and at cruise you can go into the 16s/17s no problem under light load. I really don't think that much of a change would have an adverse effect on the torque/power of the car to the effect that the gas saving would be lost by having more throttle...

Pretty sure its always 14.7 except when the engines warming up and during WOT in which it runs rich.

30 mpg is probably possible on a KA if you on the highway almost all of a tank. I've gotten about 28-29 mpg with my SR with about 60-70% freeway driving, so it's possible, but no way that's your average driving.

30mpg no way? I get on average 30-32mpg with mostly city driving, and I can almost touch 40mpg on my way to work, which is a slight downhill and light traffic that forces me to cruise @45 mph in 5th.

Changing your driving style (Low rpm, high load. cruising in neutral, engine braking.) and/or getting an instantaneous fuel consumption display (for OBDII cars) will do way more than paying to lean out your car, which probably won't pass smog.

[rudypoochris]

cruising in neutral

This costs fuel economy on a modern EFI system since the engine must now be fueled to sustain idle. Typical idle consumption for a passenger car is .5 mile worth of gas per minute (according to CA Energy Commission). To put that in perspective, it is LIKE you are traveling 30mph but you aren't even moving. That is a huge impact, thus, don't cruise in neutral.

I agree with everything else you said though! :)

[kdashy]

This costs fuel economy on a modern EFI system since the engine must now be fueled to sustain idle. Typical idle consumption for a passenger car is .5 mile worth of gas per minute (according to CA Energy Commission). To put that in perspective, it is LIKE you are traveling 30mph but you aren't even moving. That is a huge impact, thus, don't cruise in neutral.

I agree with everything else you said though! :)

I know what you're getting at, but .5 of a mile worth of gas a minute? at what speed? Its missing information.

The KA uses ~.25 gallons per hour on a warmed up engine at idle, according to my scangauge at least.

Lets say you're going down a slight incline, or you see a red light a couple blocks away, and nobody is behind you.

Now say you were going 20mph for that one block in neutral. @.25gallons per hour thats 80mpg for that one block cruising in neutral.

Of course if you engine brake the whole time you use ZERO fuel on modern FI engines, but you also slow down a lot faster and you dont always have an opportunity to engine brake.

[rudypoochris]

I agree. I just mean prolonged downhills or something similar in neutral are pointless because the engine could be running off the ground. Coming to a stop because of light changes or something similar, no one is going to die if you push the clutch in. :)

[KA24DESOneThree]

I used to get consistent 30+ mpg, including 33 or 34mpg (it was one of those two, I've forgotten by now) coming back from Vegas during the afternoon with temps around 95*.

I call BS on his around-town claim, mostly because of his grammar and spelling.

[C. Anderson]

I would probably be down but I just put a s14 sr in. It has CS elbow to 3in cat back and frontmount everything else stock with no tune and it gets 32mpg.

[Def]

40 mpg in an S14... maybe if you never hit a stop light or accelerate faster than a postal truck...

I guess I can't resist boosting at least a little bit in my car... it's why I spend money on making it faster.


As for BMW - that's sort of right - except and ETA 2.7L M20B27 doesn't cruise anywhere close to 20:1. It's right around stoich.

[BustedS13]

Pretty sure its always 14.7 except when the engines warming up and during WOT in which it runs rich.



30mpg no way? I get on average 30-32mpg with mostly city driving, and I can almost touch 40mpg on my way to work, which is a slight downhill and light traffic that forces me to cruise @45 mph in 5th.

Changing your driving style (Low rpm, high load. cruising in neutral, engine braking.) and/or getting an instantaneous fuel consumption display (for OBDII cars) will do way more than paying to lean out your car, which probably won't pass smog.

obd1 will read out fuel consumption too. i had a '94 lebaron with a trip computer.

[okterrific]

nissan obdI will not read out instantaneous fuel consumption or really any fuel consumption.

BTW. from my experiance, you do loose a ton of gas while engine braking/cruising with no throttle, since as soon as deaccel (tp/rpm starts to drop), the ECU will enrich to 11-12:1 until steady idle or the gas is pressed.

Supposedly this function of the ecu was to help prevent back firing, but, considering its dumping gas to make it pig rich, I would def. say engine braking is not free in any way :)

[xsparc]

nissan obdI will not read out instantaneous fuel consumption or really any fuel consumption.

BTW. from my experiance, you do loose a ton of gas while engine braking/cruising with no throttle, since as soon as deaccel (tp/rpm starts to drop), the ECU will enrich to 11-12:1 until steady idle or the gas is pressed.

Supposedly this function of the ecu was to help prevent back firing, but, considering its dumping gas to make it pig rich, I would def. say engine braking is not free in any way :)


well it kinda can... you just need to calculate it. it does give you your injector pulse.

Still, the guys says all the code was done from scatch, i call BS on that. Ive been helping with reverse engineering the code for about 2-3 years, since the programming manuals for the ECU CPU dont exist anymore (yea i called up the company to try and get some, got some from a similar CPUs). The roms can now be dumped into assembly code and read that way, but there is still alot of references to many devices that we dont know yet. Calum is the only one i know of who has done the most, he mad a realtime OS for an add on board that can change the rom dynamicly, if anyone could redo the code from scratch its him... but he never has so i dont think he can yet.

[okterrific]

no no and no ?

First, calum's board is not an embedded OS, its a 16bit emulator...

Second, you do not have a copy of the mitsubishi v770 manual ?

Third, have you not seen Calum's disassembly of the code? there is really no that much we do not know about it any more...

Really, witing the code is the easieast part...

if mph <10 && rpm > 3,500
inject interupt on ADC to retard current timing (ie -15)
else if rpm >6,8250
inject interupt on ADC to retard current timing (ie -15)

there you go now u have a 2 step and ign cuts.

[xsparc]

no no and no ?

First, calum's board is not an embedded OS, its a 16bit emulator...

Second, you do not have a copy of the mitsubishi v770 manual ?

Third, have you not seen Calum's disassembly of the code? there is really no that much we do not know about it any more...

Really, witing the code is the easieast part...

if mph <10 && rpm > 3,500
inject interupt on ADC to retard current timing (ie -15)
else if rpm >6,8250
inject interupt on ADC to retard current timing (ie -15)

there you go now u have a 2 step and ign cuts.

What do you think an emulator is??? its a RT shell

The v770 is the base code for the family of the CPU on for the exact one we have.

Yes there is still a good deal about it we dont, just recently found that closed loop doesnt work over ~68mph, unless you change the max mph value.

thats all well and good you know what it should like... so do you have a compiler? or are you gonna recalc all the jmp addys by hand in the bin?

[xsparc]

oh and your 2step would limit your car to 3500rpm if your speedo dies, that could be bad

[okterrific]

There are def. things that are not known (and probably never will) however, there is a lot already known to do most things needed. Yes, I know about the 68mph open loop trigger, wasn't it Bow who found that like a year ago ?

considering no one has a compiler, as it is pretty much proprietary nissan, i would simply look for and find place to insert the code by hand, thus no offests are changed and you are good to go.

If you really really really wanted to, just blank out the secondary fuel table, change the jmp logic to always point to the primary table, and insert your code there. Then, at the main program's RPM gov. check, insert a jump to the just code.

Seriously... this is not rocket science... its just ASM, and, I might add, a hell of a lot easier than x86 ASM.

[xsparc]

Bow noticed the problem, Calum found where it was and how to change it.

You could do it that way i guess, but its not thr right way to do it.

and i think x86 ASM is easier... any CPU that can change from 8 bit to 16 on the fly is a PITA.


Im not saying it cant be done, im just saying it hasnt been done... yet. The proper way to get more MPG is to redo the way it calcs the fuel needs, not just change the maps.

[Def]

nissan obdI will not read out instantaneous fuel consumption or really any fuel consumption.

BTW. from my experiance, you do loose a ton of gas while engine braking/cruising with no throttle, since as soon as deaccel (tp/rpm starts to drop), the ECU will enrich to 11-12:1 until steady idle or the gas is pressed.

Supposedly this function of the ecu was to help prevent back firing, but, considering its dumping gas to make it pig rich, I would def. say engine braking is not free in any way :)

Above the moving idle speed(about 1000-1200 RPM stock) the injectors get completely cut off when the TPS reads closed(i.e. no throttle). Have you ever ridden in a car with a wideband? *ALL* EFI cars I've ridden in will cut fuel on decel for economy and emissions purposes.

[UNISA JECS]

Thats good info about the closed loop operation doesn;t work after 68mph since I didn;t know that, where in rom editor or TunerPro would you change the mph for closed loop operation?

Im currently waiting to buy a Nistune but they don't have my current ROM so im gonna have to send them my ECU since I dont have a consult cable to download it myself.

[sillyvia13]

Seriously... this is not rocket science... its just ASM, and, I might add, a hell of a lot easier than x86 ASM.

Are you sure...

[xsparc]

yes hes sure... and so am i... its car science

[stinky_180]

soo..... can we get this 'better gas mileage' tune from you or nah... i'de like to see what you guys did to achieve this.

[BigVinnie]

I don't see why people would want this tune, if people wanted to lean out they could just change the position on the TPS maybe shift it 1 or 2 degrees and get the same result for FREE.

[baoweezee]

For 400 bucks u can be spending it on a LSD. Or other things that your car is in need of.

[S14DB]

Going on my 25mpg average. I would have to drive 15000miles to pay for this.

[sillyvia13]

Going on my 25mpg average. I would have to drive 15000miles to pay for this.


how long to you have to drive to pay for a BEE R rev limiter?
How long to you have to drive to pay for 15 horse power increase?
just wondering?

Its not a scam...gas prices are.
I will stand down for a few and when I come back YOU BE SURPRISED FOR SURE.
Why do people doubt truth,
"fact is fiction and tv is reality"

[Def]

I don't see why people would want this tune, if people wanted to lean out they could just change the position on the TPS maybe shift it 1 or 2 degrees and get the same result for FREE.

Please don't talk out of your ass. TPS has nothing to do with the load calculation which is used to lookup the target AFR.

BTW - $400 for a rom tune from some guy is a rip. I always did them for much cheaper.

[xsparc]

i can see like 200 plus shipping

[sldbyuramg]

not trying to be a dick but for 400 bucks why wouldnt we pay an extra hundred and get a tuned ECU from JWT?
that is cool tho and i guess good luck with getting this tuning bit going, everyone needs better gas mileage at this point!

[UNISA JECS]

I wish more people would read up on tunning there own ECU's, I think then alot people would have totally different perspective, I know I did, I look at JWT a totally different way now for selling "1 size fits all for a repsective setup" for so much money. It wouldn't be so bad if the price were cheaper for couple minutes of labor actually involved but hey but gotta give props its a way to make easy money, can't hate on that.

[emayearecee]

i like how this thread has become somewhat educational for me

[gunluvS14]

i can already get 30mpg on pure interstate.

but 32mph in CITY? how?

[NismoS13Chuki]

any noticeable increase in power or operating temps. remember a leaner engine does run hotter. if you can give a good price i may just look into this

[Def]

Heat = Power

Heat generated under cruising is very low compared to staying at WOT.

[Def]

I wish more people would read up on tunning there own ECU's, I think then alot people would have totally different perspective, I know I did, I look at JWT a totally different way now for selling "1 size fits all for a repsective setup" for so much money. It wouldn't be so bad if the price were cheaper for couple minutes of labor actually involved but hey but gotta give props its a way to make easy money, can't hate on that.

Well, if someone does it right there is a fair amount of time invested in developing a good tune.

So while the act of putting in a daughterboard and burning a few chips isn't that hard, you're paying for the overall process.

It's a bit like paying to make a casting mold and being able to crank out parts for $10 and selling them for $100 to recoup your investment in the mold which makes mass production possible.

[xsparc]

yea but how much did developing the tune really cost? hes saying he got it from a friend

[sillyvia13]

yea but how much did developing the tune really cost? hes saying he got it from a friend


Does it truely matter? cost? or who did it? my friend is one getting paid not me..I get pennies.

BOARD AND CHIPS! $92 for good quality boards.

To install, I am the one who will install boards...I take my time and do it as clean as I can...time to install chips...1 hour labor rate? I charge $50

Time to figure out 2 step and launch controller HOURS of tuning and perfecting. someone made the code and we will be donating a portion of sales to return the love which has been handed to us from friends...but a bee r is $250 and If I made a post for a bee r at $250 I could sell it here on zilvia in 10 minutes. bee r are the shit... this is a built in ign and fuel cut tuned PERFECT!!!!

The MPG saver...I have 4 miles in this tune...I filled up drove 29 miles and filled back up .88 gallons thats my test so far...I drive a moped ALOT to save gas and money I am a hippie kinda dude...I aint supporting govt to rob ME atleast... but in any event put a price on road tuning for HOURS again, "the master tuner" has a wideband and many more values he watches while tuning, leans out SAFELY! under low loads and under 3400 rpm if you HAMMER DOWN AT ANY POINT it will go back to the PERFORMANCE TUNE! put a price on 25 hours of tuning to lean stuff out perfectly... (I am in works to make a s13 coupe get REDICULOUS! MPG!) I will post soon enough on that later.)

The start of this was PERFORMANCE TUNE! so it has about 5 more hp? I cant put a number on it that is higher cause I dont know but 5 hp from nothing is cool to me! and it has many interesting items adjusted in ecu that better PERFORMANCE and over all "health of engine" people buy JWT ecu for $500 for a tuned ecu...
SO WHATS the problem...ohhh I am not JWT! my bad...WTF!
This price can be adjusted...if you look...I NEVER POSTED A PRICE!
I got a pm and said a price that was up in the air! then a price has popped up!

in a nut shell...
a tuned ecu alone is $500 from JWT
MPG SAVER depends on how much you drive but we can call it $100 for that tune. you can save a hundred in a month if you travel alot...
the BEE R $250 but I call it $200
Install time and chips & Boards $150

$150 parts
$200 bee r
$100 mpg tune time at a nasty rate
$50 labor to build board.

$500

dont buy it if you feel its a "rip off"
learn how to tune and shit and do it yourself...we have months of learning and tuning into JUST THIS so when your done in 4 months come back and lmk...but til then BROTHERS! I am here to help IF YOU WANT IT!
Thanks for looking and NO YOU CANT HAVE THE BIN!!! :nono:
:2f2f: Peace fellas.
Stay cool.
Russ

[sillyvia13]

not trying to be a dick but for 400 bucks why wouldnt we pay an extra hundred and get a tuned ECU from JWT?
that is cool tho and i guess good luck with getting this tuning bit going, everyone needs better gas mileage at this point!


lol...you posi rep me cause you felt bad.... your a good shit bro!

WHY YOU WOULDN"T PAY TO GET A JWT!
in my eyes...
1. JWT IS HELLA RICH TUNE lol... thats been proven a gazillion times...bad mpg
2. does it have a 2 step son! hell no. lol. the launch and rev limiter is the ish. imo. safety 1st.

[xsparc]

Chill man, i wasnt compairing you to JWT. I think thier 500 stuff is crap. I got one for free and the ONLY things that are diff from the base is higher redline, higher fuel cut, slight bump in timing accross the board. fuel map was never touched and the tip in is still there.

As for the bee r... I think all that kinda stuff is over priced. I do tunes and make stuff for 240s... for free time and labor. I do all the dev for FREE. I post it up on here and give support. If i was to sell stuff on here id only charge for parts. But thats just me.

Give a man a fish and he eats for a day, teach a man to fish and he eats for a lifetime.

If you can sell it, good on you. i just wanted to know HOW.

[sillyvia13]

Chill man, i wasnt compairing you to JWT. I think thier 500 stuff is crap. I got one for free and the ONLY things that are diff from the base is higher redline, higher fuel cut, slight bump in timing accross the board. fuel map was never touched and the tip in is still there.

As for the bee r... I think all that kinda stuff is over priced. I do tunes and make stuff for 240s... for free time and labor. I do all the dev for FREE. I post it up on here and give support. If i was to sell stuff on here id only charge for parts. But thats just me.

Give a man a fish and he eats for a day, teach a man to fish and he eats for a lifetime.

If you can sell it, good on you. i just wanted to know HOW.

I am sorry, not trying to come off as a ass! but when people who have no clue say its not possible, but I am doing it.. gets OLD! there is so many negative comments made in all threads on this forum is gets old...I could see if I posted s13 suck and shit but I am helping peeps...

I hear ya on fishing ...I am trying to fill my belly.
Well.
I will pm those who asked.
if you are interested feel free to pm me.
I again will post results often as I can.
Thanks

[gunluvS14]

nissan obdI will not read out instantaneous fuel consumption or really any fuel consumption.

BTW. from my experiance, you do loose a ton of gas while engine braking/cruising with no throttle, since as soon as deaccel (tp/rpm starts to drop), the ECU will enrich to 11-12:1 until steady idle or the gas is pressed.

Supposedly this function of the ecu was to help prevent back firing, but, considering its dumping gas to make it pig rich, I would def. say engine braking is not free in any way :)

I find that not true.
if u let off the gas with engine braking, no throttle, and STAYS IN GEAR, there's no enrichment there. I have Techtom to monitor the injector duty, if you just cruise in neutral, no load, no engine braking, then IACV comes into play and there's your enrichment. If you keep it in gear, let the rpm drops, the injector duty will drops WAY LOW

this is my case, 45mph slowing down in 2nd gear, injector duty 0.5~0.8%
45mph slowing down in NEUTRAL, injector duty 1.8~2.3%

[NismoS13Chuki]

there is a good reason to why that happens. like you said in neutral the car is at idle so the iacv comes to play and keeps you at idle. when engine braking the rpms stay up by the speed of the transmission so no real need to let in fuel.

[sillyvia13]

I find that not true.
if u let off the gas with engine braking, no throttle, and STAYS IN GEAR, there's no enrichment there. I have Techtom to monitor the injector duty, if you just cruise in neutral, no load, no engine braking, then IACV comes into play and there's your enrichment. If you keep it in gear, let the rpm drops, the injector duty will drops WAY LOW

this is my case, 45mph slowing down in 2nd gear, injector duty 0.5~0.8%
45mph slowing down in NEUTRAL, injector duty 1.8~2.3%

What are your AFR's at these same times? in neutral and in gear...

[xsparc]

~14.6 at idle and like ~18 when engine braking

[Def]

Gas saver tune... you've got to be kidding me. Someone in this operation doesn't know jack shit about tuning a Nissan ECU if it takes you longer than about 30-45 mins to get the global variables spot on such that you can hit any target AFR with a simple number change from 0 to 10980841 RPM and any load the MAF can read.

Like I said before, best gas mileage is at ~15.0:1.


$500 for a tune done by someone that takes 25 hours to get the AFR down in the fuel map of a MAF based ECU... hahahaha - what a joke.

[sillyvia13]

Gas saver tune... you've got to be kidding me. Someone in this operation doesn't know jack shit about tuning a Nissan ECU if it takes you longer than about 30-45 mins to get the global variables spot on such that you can hit any target AFR with a simple number change from 0 to 10980841 RPM and any load the MAF can read.

Like I said before, best gas mileage is at ~15.0:1.


$500 for a tune done by someone that takes 25 hours to get the AFR down in the fuel map of a MAF based ECU... hahahaha - what a joke.


lol...well enjoy your HIGH MPG savings at 15.1 lol...
DO SOME RESEARCH SMARTASS! lol...

now its $500? hahaha
WHAT A JOKE YOUR RIGHT!
I ask myself why do I keep posting to enloghten you guys but damn! fucking hate is thick in these woods!
Peace friends.
PEACE!

[xsparc]

yes..... enlighten.... buy not giving any info besides "buy my stuff... youll see it works!!"

[sillyvia13]

yes..... enlighten.... buy not giving any info besides "buy my stuff... youll see it works!!"

ohh so my fat fingers hit the O instead of I and now you witty remarks have scored you a +1 point in you head...lol...

Buy $5 a gallon gas. and run your stock ecu... I DONT CARE! well I do but fuck...

lol...
I got 32 mpg and I was in town...
I WILL FOR SURE GET 50 MPG! with a varying resource...

[xsparc]

riiiight... because you know i have a stock ecu dont you.

50 MPG from a ANY engine in a 240? yea right... go on buddy, make your money

[Pank]

ohh so my fat fingers hit the O instead of I and now you witty remarks have scored you a +1 point in you head...lol...

Buy $5 a gallon gas. and run your stock ecu... I DONT CARE! well I do but fuck...

lol...
I got 32 mpg and I was in town...
I WILL FOR SURE GET 50 MPG! with a varying resource...

you get 2 s chassis cars to get 50mpg without pulse and glide or any hypermiling technique and i will buy you a house

[okterrific]

you can easily get 50 mpg in an s13 chassis.... just swap in a diesel car engine:)

you did say swap in any engine :)

[kdashy]

you can easily get 50 mpg in an s13 chassis.... just swap in a diesel car engine:)

you did say swap in any engine :)

From what car? I bet the S-chassis is heavier than it. E.G. lower milage.

[svensko]

Yeah you may get 50 MPG on the highway but IMAGINE WHAT YOU'D GET IN SPACE!!! :aw:

[LA_phantom_240]

I dunno about you guys, but when I drive sanely I get about 30mpg highway, 25 city... in an s14 with DC header, K&N filter, eBay special 3" XSPower catback, no egr, and altima fans... and don't forget cylinder #2 leaking compression into my cooling system.

[BigVinnie]

Please don't talk out of your ass. TPS has nothing to do with the load calculation which is used to lookup the target AFR.




TP just fools the ecu, it's no different than piggy backs do. So in essence it would just cut back on injector pulse width a bit. Even under load the ecu is still calculating fuel to throttle position, I don't see why it doesn't work.

[UNISA JECS]

To the OP are you disabling closed loop operation in the ECU and forcing open loop in all situations?

Thats the only way I could see anything leaner than 14.7:1 being achieved during cruise without the ECU correcting unless the target AFR is adjustable but thens thats brings the quesion of how the stock narrowband would work unless its no longer needed.

[CKAMC]

I am wondering why no one has said...

HYPER MILE'ing!!!!

:keke:

[kdashy]

I am wondering why no one has said...

HYPER MILE'ing!!!!

:keke:

haha, I use some of the techniques like pumping tires to max sidewall psi driving w/ and pulse and glide, but the more hardcore techniques like Forced Autostops scare me.

[Def]

TP just fools the ecu, it's no different than piggy backs do. So in essence it would just cut back on injector pulse width a bit. Even under load the ecu is still calculating fuel to throttle position, I don't see why it doesn't work.

No it doesn't. TPS position doesn't factor into the load/target AFR calculation whatsoever.

lol...well enjoy your HIGH MPG savings at 15.1 lol...
DO SOME RESEARCH SMARTASS! lol...

now its $500? hahaha
WHAT A JOKE YOUR RIGHT!
I ask myself why do I keep posting to enloghten you guys but damn! fucking hate is thick in these woods!
Peace friends.
PEACE!

Research? Please - I have my bachelors of science in Mechanical Engineering, and my technical concentration was internal combustion engines.

I've been tuning cars for 3+ years and have a much longer history of the science behind them, and would be willing to put my knowledge of tuning the thermo/fluids/combustion side of an engine up against ANYBODY on this forum.


You'd be smart to listen to what I post. Like I said again, the OEM engineers aren't stupid. They would have made a 30+mpg KA back in '91 if all it meant was changing one value from 192 to 182 in the fuel map.

lol...well enjoy your HIGH MPG savings at 15.1 lol...
DO SOME RESEARCH SMARTASS! lol...

now its $500? hahaha
WHAT A JOKE YOUR RIGHT!
I ask myself why do I keep posting to enloghten you guys but damn! fucking hate is thick in these woods!
Peace friends.
PEACE!

BTW - what is the target AFR in the cruising region. I'm curious to see just how stupid you are, and how much you haven't tested this against other AFR.


I have done about 20 different tests of at least 200 miles each on my car of just cruising just to see what the effect is. Guess what - it proved all the prior research on cruising AFR right. I'll save you guys a lot of time and effort - 15.0-15.3:1 is the optimal range to cruise on a conventional EFI engine.

[S14DB]

From what car? I bet the S-chassis is heavier than it. E.G. lower milage.

2.5L TD out of a UK/AU Frontier.

[LA_phantom_240]

2.5L TD out of a UK/AU Frontier.

Engine code?

EDIT: According to wikipedia (I know its wrong sometimes) says it came with a 2.7 I-4 TD.

[okterrific]

TP just fools the ecu, it's no different than piggy backs do. So in essence it would just cut back on injector pulse width a bit. Even under load the ecu is still calculating fuel to throttle position, I don't see why it doesn't work.


TP just fools the ecu? wow... just wow.... FYI, the ECU doesn't calculate any fuel base on the TPS....

[S14DB]

Engine code?

EDIT: According to wikipedia (I know its wrong sometimes) says it came with a 2.7 I-4 TD.

That's the TD27 out of the First Gen. I'm talking about the 2.5 dCi w/6-speed manual in the 2gen. It's renamed the the Navara. 171 HP, 297ft/lbs. 33.2mpg in a 4,567lb vehicle.

http://en.wikipedia.org/wiki/Nissan_Navara

I was considering the swap but I found no convenient way to ship one from uk/au to here.

[okterrific]

also mercedes has a few diesels, along with VW and even honda... they all hit 40-50+ mpg in heavier cars.

[sillyvia13]

update...still at FULL and went 62 miles.
I hate myself sometimes. saving money SUCKS!
I also hit a sweet corner and raced a jdm Tyte civic. well he raced, I drove a little harder than normal...he was pissed I was amused.

ahh, drifting with mpg saving is saweet. my cheapness deep within is happy.

[xsparc]

wow me too... good thing the guage is NOT linear at the top and bottom...

[UNISA JECS]

wow me too... good thing the guage is NOT linear at the top and bottom...

Thats very true and is not a good refference at all.

With my bone stock KA24DE I could do the same thing, but from the E line to below E or when the gas light came on I could dish out another ~100 miles or more and then do I fill up and get 14.8 gallons in all teh while getting 387 miles with 14.8 gallons with a automatic KA24DE cruisng @ 95mph the majority of the way and I done this same trip many many times.

Thats almost 27mpg at those speeds in a automatic cruising at 3700rpm in Overdrive at 95mph.

[steve shadows]

I got about 35 mpg hwy yesterday with my 400-500hp sr on 91 with a 14.0:1 AFR

as soon as I layed into the pedal and did a little pull on the fwy the gas guage moved though haha awww mighty CFMs, 850s and GT30s

[SimpleSexy180]

update...still at FULL and went 62 miles.
I hate myself sometimes. saving money SUCKS!
I also hit a sweet corner and raced a jdm Tyte civic. well he raced, I drove a little harder than normal...he was pissed I was amused.

ahh, drifting with mpg saving is saweet. my cheapness deep within is happy.

so your gas gauge is broken?

[babowc]

rofl
this bullshit thread needs to be deleted.
ugh.

[Risu2112]

rofl
this bullshit thread needs to be deleted.
ugh.

No, not yet I want to see some one link the pre-ignition catalytic converter first.

[brokeAs240sx]

That's the TD27 out of the First Gen. I'm talking about the 2.5 dCi w/6-speed manual in the 2gen. It's renamed the the Navara. 171 HP, 297ft/lbs. 33.2mpg in a 4,567lb vehicle.

http://en.wikipedia.org/wiki/Nissan_Navara

I was considering the swap but I found no convenient way to ship one from uk/au to here.

Just a side note - in case you didn't do the conversion already, 33.2mpg in uk/au ~27.6mpg US.

Back on topic - OP, other than posting "I get 35+ mpg", do you have any way of showing it? Of course, you aren't required to show any proof, but you should be able to see that the criticism you are receiving from this board isn't completely uncalled for. Don't want to give away the "secret" w/o revealing too much so you can still sell it? Maybe something as simple as creating a short video of u filling up the gas, driving around town for 30min-1 hour (maybe do a time elapse here), then going back to the gas pump.

Besides all the actual ecu talk, have you verified that your speedometer is correct - i.e. have it logged @ different cruising speeds via gps? I know my speedo was off by a good 4-8% stock going highway speeds. This question goes to most ppl who post their mpgs.

[xsparc]

No, not yet I want to see some one link the pre-ignition catalytic converter first.

haha thats right up there with the "tornado" and the "+22hp ebay chip"

[stinky_180]

just hook us up with the bin file of this tune.......

[tckracker]

Just a side note - in case you didn't do the conversion already, 33.2mpg in uk/au ~27.6mpg US.

Back on topic - OP, other than posting "I get 35+ mpg", do you have any way of showing it? Of course, you aren't required to show any proof, but you should be able to see that the criticism you are receiving from this board isn't completely uncalled for. Don't want to give away the "secret" w/o revealing too much so you can still sell it? Maybe something as simple as creating a short video of u filling up the gas, driving around town for 30min-1 hour (maybe do a time elapse here), then going back to the gas pump.

Besides all the actual ecu talk, have you verified that your speedometer is correct - i.e. have it logged @ different cruising speeds via gps? I know my speedo was off by a good 4-8% stock going highway speeds. This question goes to most ppl who post their mpgs.

ReeEAAAAALLy, there is another person out there that can articulate a point and form a cognitive statement without getting mad, slandering, and cursing??? I'm all for using whatever word necessary to show my emotion behind a subject, but that means there are very mad people on this forum. Anyone that does not ask for proof or do research on a product they intend on buying deserves to lose their money. I am not saying that this product is a scam, I merely agree with brokeAs240sx. "IF YOU" want it, ask for proof, if not ignore this thread, verbally spewing your "knowledge" without proof is masturbation, that goes for both sides and politicians. I could be a rocket scientist or a bum with wifi for all anyone knows, but until I take you to JPL (Jet Propulsion Laboratory) I have no proof.
I ask, How much are you charging for this Mileage tune? What is included? Without specifics, what is being changed and can this be harmful to the vehicle in anyway? And finally, are you able to show factual proof of concept and is there a satisfaction warranty?
I hope that everyone has a great day, wins the lottery, and gets a date with Jessica Alba(or Johnny Depp if thats the way you swing) :)

[sillyvia13]

lol...
I will make a few ecu's soon enough...cheaper and with a full all out bin file, complete list of whats changed. and what I have seen in my exp with my car.
Sorry.
russ.

[sillyvia13]

I hope I get that date with alba...I saved a few bucks with gas so BK lounge it is!

[derek_s13]

i cannot hold a candle to most of the knowledge being thrown in this thread. i'm humbled by seeing this on zilvia at this point in time.

BUT, i CAN say..



russ (the OP) has never done me wrong.

although he is raw and abrasive, he's always been helpful to anyone i've known, and lots of people in the 240 community.

i can't vouch for his knowledge on ecu tuning, but i can vouch for his integrity and helpfulness.

if you disagree with his claims on this subject, i can't blame you.

but if he's integral enough to know that if he didn't believe in something, he wouldn't sell it. that's all.

[sillyvia13]

thats derek.
all I am trying to do is help.
you know me.

people think its a scam...so me and my close homies will be tuned and the rest can tell me it is not possible.

oh well.
life goes on...
raw and abrasive... damn... just say I am a asshole would ya! lol...

[BigVinnie]

thats derek.
all I am trying to do is help.
you know me.

people think its a scam...so me and my close homies will be tuned and the rest can tell me it is not possible.



I don't think anyone thinks it is a scam. It's more of the inevitable reality. You can only tune so lean before the egt starts warping valves. Then the engine starts to starve with power loss when you tune to lean. People that enjoy HP for shits and giggles actually tune richer for natural aspiration around 12.6:1 in higher RPMS between 5000 and 7000RPM.

I don't think that in the process of making an engine more conservative to fuel, can you improve the performance. To some extent there is a balance between the 2 before you start to sway either more conservative, or more towards performance.
You can't have both.
Unlerss of course you want to switch to a different platform of car and engine type like a mini cooper thast gets an estimated EPA 36 MPG.

I believe that OEM manufacturers try there best in making an engine reliable as well as fuel conservative. Tuning to lean starts to throw the whole concept of reliability out the window, while tuning to rich makes a gas hog while maintaining the best reliability.

In all reality I've realized the best way to increase MPG is through bolt on's.
Bigger exhaust increase HP and MPG.
Aluminum drive train components allow an engine to reduce load which improves HP and MPG.
Better more responsive and reliable spark plugs increase power and MPG.
Then there is the ultimate in drive train which is in the gearing and whether gears are tall or short. In many regards this is the same case between being conservative or having performance. I taller final drive may yield better gas mileage but it will make a vehicle so much slower.

Now what you are selling may not be a scam nor would it be one that I would normally want to pay top dollar for either. In any circumstance as much as I've dealt with cars I know it wouldn't benefit me as a performance enhancement so why bother. This would be something more that you sell to conservative liberals, or in other words tree huggers. Zilvia in general definitely isn't that type of market place.

[sillyvia13]

^
I have a lightwieght drivetrain...
all the goos stuff...
tree huggers or not...saving loot is saving loot...
I will send a tune out soon...
then he can post his thoughts...
like i SAID. anyone in nh wanna take my ecu for a few days feel free...
then report back to this thread...and tell your exp. simple.

I love it.
I am real friggin cheap tho too.
I use ac and slide...32 mpg. works fo me.

[Def]

I don't think anyone thinks it is a scam. It's more of the inevitable reality. You can only tune so lean before the egt starts warping valves. Then the engine starts to starve with power loss when you tune to lean. People that enjoy HP for shits and giggles actually tune richer for natural aspiration around 12.6:1 in higher RPMS between 5000 and 7000RPM.

I don't think that in the process of making an engine more conservative to fuel, can you improve the performance. To some extent there is a balance between the 2 before you start to sway either more conservative, or more towards performance.
You can't have both.
Unlerss of course you want to switch to a different platform of car and engine type like a mini cooper thast gets an estimated EPA 36 MPG.

I believe that OEM manufacturers try there best in making an engine reliable as well as fuel conservative. Tuning to lean starts to throw the whole concept of reliability out the window, while tuning to rich makes a gas hog while maintaining the best reliability.

In all reality I've realized the best way to increase MPG is through bolt on's.
Bigger exhaust increase HP and MPG.
Aluminum drive train components allow an engine to reduce load which improves HP and MPG.
Better more responsive and reliable spark plugs increase power and MPG.
Then there is the ultimate in drive train which is in the gearing and whether gears are tall or short. In many regards this is the same case between being conservative or having performance. I taller final drive may yield better gas mileage but it will make a vehicle so much slower.

Now what you are selling may not be a scam nor would it be one that I would normally want to pay top dollar for either. In any circumstance as much as I've dealt with cars I know it wouldn't benefit me as a performance enhancement so why bother. This would be something more that you sell to conservative liberals, or in other words tree huggers. Zilvia in general definitely isn't that type of market place.

Low load EGTs aren't a major concern. Not only are the temps lower than a higher load condition, but the actual exhaust massflow and thus heat fluxes involved are much lower.


I love this "my homies have the magical ECU tune for the gas mileage dawg!" talk - it's classic.

Like I said before, if you think the guys who were calibrating all the early 90's OEM Nissan ECUs were really so stupid as to miss out on 7-8 mpg by just making the low load fuel cells in the low 190's vs. the low 180's for the hell of it, well... I've got some waterfront property in Arizona I'd like to sell you.

[S14DB]

Low load EGTs aren't a major concern. Not only are the temps lower than a higher load condition, but the actual exhaust massflow and thus heat fluxes involved are much lower.


I love this "my homies have the magical ECU tune for the gas mileage dawg!" talk - it's classic.

Like I said before, if you think the guys who were calibrating all the early 90's OEM Nissan ECUs were really so stupid as to miss out on 7-8 mpg by just making the low load fuel cells in the low 190's vs. the low 180's for the hell of it, well... I've got some waterfront property in Arizona I'd like to sell you.
Lake Havasu?

[sillyvia13]

Low load EGTs aren't a major concern. Not only are the temps lower than a higher load condition, but the actual exhaust massflow and thus heat fluxes involved are much lower.


I love this "my homies have the magical ECU tune for the gas mileage dawg!" talk - it's classic.

Like I said before, if you think the guys who were calibrating all the early 90's OEM Nissan ECUs were really so stupid as to miss out on 7-8 mpg by just making the low load fuel cells in the low 190's vs. the low 180's for the hell of it, well... I've got some waterfront property in Arizona I'd like to sell you.

dawg? not me brah... nice qoute.
so how much for the land? does it come with a bridge?

Haters. its whats fo dinner.
I like that alot of people doubt me...just pushed me more. to be a better brighter person...
I think it funny how the way I speak or type is a big concern...
you guys makea me laugh...
back to my moped. 150 mpg. :bigok: cheap fuck here.

[02BRB20]

you should have your friend come on this forum to explain what he did, bc you not knowing the math behind it is killing your sales pitch and your credibility.

[xsparc]

So when is this tune gonna be out? i think i have an idea on what was done an i wanna see if i was right.

[atom]

So how many more miles can I get with this ECU + flintstones mod?

[Este510]

I don't know but I get 36 mpg on my sr20 powered s13. Oh Steve Shadows tuned it.

[stinky_180]

just give us the bin file and lets end this thread.

[sillyvia13]

just give us the bin file and lets end this thread.
lol...

It has been retuned.
I love it.
25 boards in the mail.
ecu's coming. CHEAP! with all info on the table.
I have many miles on these tunes... no bad effects other than me beating the shit out of my car...but thats with or with tune..lol..

2nd gear rubber with just throttle no clutch kicks needed... so wierd...lol
azenis rubber.