topped out ??

[jakethesnake]

iw as driving my 240sx on the freeway yesterday and i wanted to top it out and it wouldnt go any faster then 110... i jsut swaped my SR in..what are they suppose to top out at and what do you think the problem is??
im at stock boost, almost everythign stock, FMIC, and a few goodies..

[slider2828]

What exactly do you mean by wouldn't go any faster than 110? The revs wouldn't go any further, describe the experience more...

[sillyvia13]

factory speed limiter..
you can splice a switch in to remove speed limiter..but you will not see speed do to cutting limiter it is same signal from ecu and cluster.

you really do not need to go 170! but when you do ! you tube it

[Pink Slut]

you need 2 of these, by tonight

http://www.tamparacing.com/forums/attachments/misc-automotive-sale-wtb/48499d1114962322-10-lb-nitrous-bottle-sale-nos.jpg
:p


afermarket chip/ecu would resolve it

[jackjack]

http://www.fakejazz.com/images/nos.jpg

[steve shadows]

iw as driving my 240sx on the freeway yesterday and i wanted to top it out and it wouldnt go any faster then 110... i jsut swaped my SR in..what are they suppose to top out at and what do you think the problem is??
im at stock boost, almost everythign stock, FMIC, and a few goodies..

Yeah factory speed limiter is right.

Buy a Power FC or get a Haltech.

No more speed limiter than come get it tuned.

Fuck rom-tunes if your close to a dyno.

They are all just flat timing maps anyways, don't believe the hype

[garagelu]

Yea I have upgraded turbo with power fc and I got my car up to 150 mph the other day. Did it once and no need to ever do it again. Just wanted to see what it could do. I think I was at around 6800-7000 rpm. So still had a little more room to go.

[steve shadows]

exactly :2f2f: :naughty:

[Sir]

..but you will not see speed do to cutting limiter it is same signal from ecu and cluster.

Not this shit again.
it goes from VSS to cluster to ecu.
so cutting at the right place will not leave you w.o speed.

Also, I doubt that 170mph is possible with SR without ALOT of mods. Wind resistance is a bitch.



BTW this is me, on stock ecu and bald ass tires and tired suspension.
http://i11.photobucket.com/albums/a157/kane2g/Long%20Island%20Trip%202006/100_0421.jpg

[jakethesnake]

do i really need to get the power FC or can i just chip my ECU??

[Mr. Jesse]

just get the fc

unless you know how to solder and remove solder like a pro

[jskateborders]

some dude was on here selling a speed limiter cut controller. But 110 on the freeway is hardly a good Idea

[DRFTSAINT]

If you don't have the funds for a FC or other tunable stand alone, buy a Greddy Speed Cut Controller they are like $80 tops on ebay

[HalveBlue]

OR...

you could just disconnect the wire that goes into the ECU.

Did it, speedo still works fine.

[ILoveMyRHS13]

Ah the advantages of an automatic... Well only one, no limiter! The rest SUCKS.

[blownmotor]

I did 140mph on my s13 and it was hella scary( did it just to see if the car could do it) And most likely you're watching too much Wangan Midnight. 240sx is not a top speed car. Oh and real racers don't use NOS

[sldbyuramg]

you really do not need to go 170! but when you do ! you tube it


170 is pretty fast... what is the max speed the 240 can go with the stock gearing? (5spd)

no matter how much HP you have or aerodynamics...you will run out of gears if it is stock gearing

[Def]

Yeah factory speed limiter is right.

Buy a Power FC or get a Haltech.

No more speed limiter than come get it tuned.

Fuck rom-tunes if your close to a dyno.

They are all just flat timing maps anyways, don't believe the hype

Constant timing per a given load does not correlate to a constant amount of ign timing at a given MAP on a MAF based setup - big difference there. That said, many of them are flat, but it honestly works best on most cars that have anywhere near "stock breathing."

Power FC sucks balls though, can't believe you're recommending that over a ROM tune. If you can play Gameboy forever to tune your car, just man up and learn to rom tune your own car.


BTW - my car on the factory speed limiter would shoot out a 3-4 ft flame out the exhaust on the track. Probably not healthy for the turbine to do for very long.

[WoolyS14DET]

disconnect the 5th gear switch on the tranny and see what happens ????

[jskateborders]

I did 140mph on my s13 and it was hella scary( did it just to see if the car could do it) And most likely you're watching too much Wangan Midnight. 240sx is not a top speed car. Oh and real racers don't use NOS
Really, Ive drivin alot of cars, and my s13 seems to be the smoothest when the speeds get up there. Everything else gets a little scary

[jspaeth]

It shouldn't be that hard to calculate/figure out top speed.

Cd*frontal area of many cars can be found online.
Multiply this by 1/2*speed^2 to get drag force.

Multiply drag force by velocity to get power (power is force multiplied by velocity, or power per time).

So essentially, hp required to overcome drag goes as v^3.

Look up some high performance cars, look up their Cd*area, and look up their wheel hp, and you can get an idea of top speed.

I believe, in theory it is higher than you think....240s have a lower Cd*area than Ferraris, so at high speeds, with identical hp, 240s can pull harder.

The caviat is that the reason Ferraris have more drag is bc you need drag to produce downforce.

Result: A 240 and Ferrari with the same hp, 240 could pull harder at high speeds, but is much more likely to flip over due to lack of downforce

[slider2828]

6800 at 110 or whatever? What you think an extra 400 rpm will give you a bazillion miles more... Dun think so... Probably governor at 125. Extra 400 rpm is asking to blow at redline at that speed.... but heck whatever. cut the wires...

[IRN]

hit a bump and get a few inches of air at 110 with a 2 way lsd and your not going to like the landing. it gets pretty scary at high speeds.

[Def]

6800 at 110 or whatever? What you think an extra 400 rpm will give you a bazillion miles more... Dun think so... Probably governor at 125. Extra 400 rpm is asking to blow at redline at that speed.... but heck whatever. cut the wires...

What car are you talking about? I hit 110 mph at 4.7k RPM in 5th gear on my S13. That means I have almost 3k RPM more left before the rev limiter, which is about 65 mph more.

[Erjay1]

Damn 110? I can do 110 in 4th gear, maybe even 3rd...lol. Fastest Ive gone in my Z is 163mph.

[rowdogg03]

How the hell can you guys say your going 140-150 when the speedo tops out @ 110? Good guessers?


http://i11.photobucket.com/albums/a157/kane2g/Long%20Island%20Trip%202006/100_0421.jpg

BTW dont drive like a retard on the freeway.. :fawk2:

[slider2828]

Just cut the VSS wire... and enjoy...

[Ineedparts]

I want a diargram and color of this wire, because i need to cut it also.

[steve shadows]

Constant timing per a given load does not correlate to a constant amount of ign timing at a given MAP on a MAF based setup - big difference there. That said, many of them are flat, but it honestly works best on most cars that have anywhere near "stock breathing."

Power FC sucks balls though, can't believe you're recommending that over a ROM tune. If you can play Gameboy forever to tune your car, just man up and learn to rom tune your own car.


BTW - my car on the factory speed limiter would shoot out a 3-4 ft flame out the exhaust on the track. Probably not healthy for the turbine to do for very long.


Data logit + Power FC + Dyno Always > Rom Tune (No Game Boy Involved fuck the hand commander) I'd throw it in the trash if I had one.

Haltech is the best. Hands down for the money. I have used AEM and I can personally say the software useability is stupid and over done, trys to make you feel like your doing something over complicated and insane. it's just maps. It's like stupid colored maps and aweful schemes to every drop down etc. Haltech and AEM are the only ones I reccomend period but no one on this forum is about to shell out for one or has the balls to run one.

I can't believe your suggesting thata Rom Tune done with some sort of generic saftey map from accross the country is better than a Power FC (which is just like a rom tune) don on a dyno specifically tuned for that car with the tuner in person monitoring the outcomes.

:(

[steve shadows]

BTW this is me, on stock ecu and bald ass tires and tired suspension.
http://i11.photobucket.com/albums/a157/kane2g/Long%20Island%20Trip%202006/100_0421.jpg

YOUR DOING IT WRONG

http://i206.photobucket.com/albums/bb129/shadowerks/haha-1.jpg

mine haha almost -

[jakethesnake]

hahahaha that would be bad ass!

[steve shadows]

How far can the needle go? anyways

I always look down and it's like Tapping off the dash thing

dont really like looking down when it's doing that though

[jspaeth]

How the hell can you guys say your going 140-150 when the speedo tops out @ 110? Good guessers?



BTW dont drive like a retard on the freeway.. :fawk2:



OMG are you for real?

Okay, get in your car, go out to the highway, and drive the car at 3500 RPM in 5th gear....for SR/KA stock tranny/rearend, this is around 82-84 MPH or somewhere around there.


Therefore, at 7000 RPM, you are going twice as fast....it's really quite simple.

So my guess for SR revved to 7000 is like 170 or so, which I think you could get there, but I wouldn't try it, bc one small bump and your car could easily just flip right over

[s13silvia123]

YOUR DOING IT WRONG

http://i206.photobucket.com/albums/bb129/shadowerks/haha-1.jpg

mine haha almost -

hahahaha lol thats funny

[eastcoastS14]

I once did 220mph in my 240....true story

[rowdogg03]

In no way is that accurate.. You are just a good guesstamator..

OMG are you for real?

Okay, get in your car, go out to the highway, and drive the car at 3500 RPM in 5th gear....for SR/KA stock tranny/rearend, this is around 82-84 MPH or somewhere around there.


Therefore, at 7000 RPM, you are going twice as fast....it's really quite simple.

So my guess for SR revved to 7000 is like 170 or so, which I think you could get there, but I wouldn't try it, bc one small bump and your car could easily just flip right over

[sillyvia13]

Yeah factory speed limiter is right.

Buy a Power FC or get a Haltech.

No more speed limiter than come get it tuned.

Fuck rom-tunes if your close to a dyno.

They are all just flat timing maps anyways, don't believe the hype

I disagree...but would like to hear you reply... NOT LOOKING AT A PISSING CONTEST!
I have a rom tuned ecu in my street drivin s13 KA NA...and Fuel maps have been altered. and timing maps...not so much timing YET! also have a 2 step...etc...a fan controller for raditor...many many funcations I have not even figured out yet.
not to mention...my speed limiter is like 435 kmh...hahaha
but for the price of it...you cant go wrong...its pretty much standalone but no realtime...at least what I have...a rom burner...nistune is realtime...

can you tell me what a haltech can do a rom can not...truely...I have never toyed with one! will be soon...rb25det holset and a haltech w/ map!

[jskateborders]

How the hell can you guys say your going 140-150 when the speedo tops out @ 110? Good guessers?



BTW dont drive like a retard on the freeway.. :fawk2:
Its called a pace car.....
btw sr trans, 17 in rims with 225 45's is roughly 145 at 6grand in 5th

[steve shadows]

8 grand? with longer final :p :eek3d:

bumper nearly pushed off the car and my headlights both broke lol

time for silvia front end with bracing

[jspaeth]

In no way is that accurate.. You are just a good guesstamator..


Are you serious or kidding?

It's a very simple concept.....MPH per RPM in each gear is a fixed quantity. There is no "guesswork" in this.

Unbelievable.

[blownmotor]

Has anyone tried the shake n bake technique yet

[sillyvia13]

HUD will tell ya!

[KA-T_240]

....GPS FTW.

Until it can not keep up with your acceleration. The fastest GPS speed I have in my car is 147mph, it cought up while I was coasting/slowing down. I need to figure out a peak hold type thing on it.

[jspaeth]

I can't believe you guys are still debating how to calculate your speed...

Unfuckingbelievable.

Again, for the slow ones:

In 5th gear, rev to X1 Rpms and take note of your speed Y1

In that same gear, your new speed at X2 Rpms is:

Y2 = Y1*X2/X1

Simple ratios....there is no significant slippage of tires, and this is gonna give you just as good as estimate as the uncertainty associated with your eyes reading the speed or revs off of the speedo/odo.

Motherfuck

[KA-T_240]

^What he said!

If you do not believe it. Go out and drive 40mph in 5th gear and look at your RPMS. Then speed up to 80mph(double your previous speed) and look at your RPM. You will notice it is pretty much double.

also, remember your tach on the gauge cluster is not that accurate.

[s13 @ fullboost]

today i did an ECU swap my friend had an auto ecu and we traded them. the auto one said like b16 or something and then mine said b17 but that was like the only diffrence between them, so anyways we hooked it up and took the car for a test drive and let me tell you if you dont already know ...RPM's keep going and the mph gets stuck it was pretty sweet also my idle is smoother like much smoother i recomend the auto ECU if you are tight on money and wanna go fast but be carful it still a 240 haha

[s13Carlo]

yea your welcome fullboost, hah trust me guys the auto ecu works, i have gotten my car when it was completely stock up to like 140 around there and it leans out gas a bit when crusing

[raz0rbladez909]

HKS Speed Limit Defenser i don't know if they still make it but I guess it beats trying to find an auto ecu. Also keep that shit on the track, get caught and your leaving in the back of the po po wagon, or worse in an ambulance

[s13 @ fullboost]

Also keep that shit on the track, get caught and your leaving in the back of the po po wagon, or worse in an ambulance



yeah dude i agree even when it is very tempting shit is dangerious and dumb. but i would be a hypocrite to say i havent done dumb shit like it before haha and auto ECU is cheaper than HKS anything shits wayy expensive you can go to a junkyard and get an auto ECU for like 35 bucks

[raz0rbladez909]

iw as driving my 240sx on the freeway yesterday and i wanted to top it out and it wouldnt go any faster then 110... i jsut swaped my SR in..what are they suppose to top out at and what do you think the problem is??
im at stock boost, almost everythign stock, FMIC, and a few goodies..

yea but how many junkyards here have auto sr20 ecu's in em?

[s13 @ fullboost]

yea but how many junkyards here have auto sr20 ecu's in em?



oh oops didnt think about that good point your right

[s13Carlo]

alot, in japan. im sure someone can find an auto ecu for an sr just ask around get one from the old sentras

[s13 @ fullboost]

alot, in japan. im sure someone can find an auto ecu for an sr just ask around get one from the old sentras

thoes are N/A right?

[s13Carlo]

thoes are N/A right?

yes they are but i believe they are the same ecu

[s13 @ fullboost]

yes they are but i believe they are the same ecu
well i guess if you use a piggy back system it would work

[s13Carlo]

yea i guess so or can just disconnect every speed sensor in your car hah

[JDM671]

http://www.fakejazz.com/images/nos.jpg

dam you look like you got enough nos to blow yourself into pieces

[d*star180]

Has anyone tried the shake n bake technique yet

Best post in this thread.

[KiLLeR2001]

Can't you just snip the yellow w/green stripe wire at the ECU?

[jskateborders]

yes they are but i believe they are the same ecu
Not even close. Sentra = distributer
Silvia = coilpacks
Sentra = fuel curve for Na
Silvia = fuel curve for boost
Among many many other things.
Wont work.
Not even with a piggyback

[blu808]

I use a gps system for dead on accurate speed readings.

The fastest we got my fd upto was 174 mph at the san jose grand prix. 6950 rpm in 5th gear. and it still had another gear (overdrive). Anyways. I want to build a silver state classic, or bonneville car if I ever have money.


Btw, all our cars create lift at speed. even if we have diffusers and gt wings.

What we really need is full undertrays.

[s13 @ fullboost]

Not even close. Sentra = distributer
Silvia = coilpacks
Sentra = fuel curve for Na
Silvia = fuel curve for boost
Among many many other things.
Wont work.
Not even with a piggyback


very nice +1 for you my friend

[TougeLabs]

I use a gps system for dead on accurate speed readings.

The fastest we got my fd upto was 174 mph at the san jose grand prix. 6950 rpm in 5th gear. and it still had another gear (overdrive). Anyways. I want to build a silver state classic, or bonneville car if I ever have money.


Btw, all our cars create lift at speed. even if we have diffusers and gt wings.

What we really need is full undertrays.

Thats what im building right now, our cars have a few down falls but i want to at least hit the 200mph marker and get my red hat

[steve shadows]

HUD will tell ya!

Sensor in hud means nothing after about 125-130.

The sensor in the tranny is the problem, the gear just goes haywire after about that speed.

[sillyvia13]

really!
fuck...that was the only real reason for me to install...I wanted to see a top speed numba!

[steve shadows]

Get a Haltech or Motec and a wheel speed sensor :)

[advin builtsr20]

I did 140+ multiple times in my s13 and the only time it was bad was with the cut springs I had on it. Knew it was 140mph cause I asked my buddy to stay next to me in my 2g GSX (speedo goes to 170mph). After a nice full coilover set up it wasn't too bad at all. I used the cusco coilovers. But one thing I will highly recommend if you plan on doing high speeds is a good brake set up!! something I wish I had done before I planned on going fast...after i sells my s14 my next s13 definitely gonna go foot work first then swap...

[Def]

Data logit + Power FC + Dyno Always > Rom Tune (No Game Boy Involved fuck the hand commander) I'd throw it in the trash if I had one.

Haltech is the best. Hands down for the money. I have used AEM and I can personally say the software useability is stupid and over done, trys to make you feel like your doing something over complicated and insane. it's just maps. It's like stupid colored maps and aweful schemes to every drop down etc. Haltech and AEM are the only ones I reccomend period but no one on this forum is about to shell out for one or has the balls to run one.

I can't believe your suggesting thata Rom Tune done with some sort of generic saftey map from accross the country is better than a Power FC (which is just like a rom tune) don on a dyno specifically tuned for that car with the tuner in person monitoring the outcomes.

:(


A ROM tune isn't necessarily done across the country. I was more talking about someone spending $100 on some hardware and doing it themselves on a dyno vs. spending a retarded amount of money for all that Power FC crap to do essentially the same thing. Or getting someone local who can tune their ECU.

I guarantee you I can match any result you get out of a Power FC with a ROM tune for a fraction of the cost. The only time a Power FC makes sense is on an S14 setup that is hard to find daughterboards for.

MAP based setups are nice, but there is something to be said for the robustness of a MAF setup.

[KA-T_240]

I use a gps system for dead on accurate speed readings.

The fastest we got my fd upto was 174 mph at the san jose grand prix. 6950 rpm in 5th gear. and it still had another gear (overdrive). Anyways. I want to build a silver state classic, or bonneville car if I ever have money.


Btw, all our cars create lift at speed. even if we have diffusers and gt wings.

What we really need is full undertrays.

Got pics of where you were doing 174mph?

[240cracker]

if you do end up getting a power fc i have one a brand new in the box for s14 sr.
idk what u have

power fc is the shit

[steve shadows]

A ROM tune isn't necessarily done across the country. I was more talking about someone spending $100 on some hardware and doing it themselves on a dyno vs. spending a retarded amount of money for all that Power FC crap to do essentially the same thing. Or getting someone local who can tune their ECU.


There is a little saying in business time is money.

How much time does it take the average car enthusiast to build his own ecu, or add a board to an ecu and learn how to properly tune it or buy all the supplies, hardware nessicary.

Proove all it will cost is 100 bucks. Then Ill believe you.

Robustness of a MAF setup? lol

Yeah I love stabbing in the dark when I am tuning a timing map.

I want to know PRESSURE if I am tuning a forced induction car that see's a race track.

( I would data log pressure over MAF readings at least )


PS. Power FC is not the shit, Haltech is the shit.

[xplicit240]

LOL. yeah man i shared the same experience. my needle was way passed the odometer. anyways i know you got the problem figured out but all you needed to do was buy a simple speedlimiter cut.

[Def]

There is a little saying in business time is money.

How much time does it take the average car enthusiast to build his own ecu, or add a board to an ecu and learn how to properly tune it or buy all the supplies, hardware nessicary.

Proove all it will cost is 100 bucks. Then Ill believe you.

Robustness of a MAF setup? lol

Yeah I love stabbing in the dark when I am tuning a timing map.

I want to know PRESSURE if I am tuning a forced induction car that see's a race track.

( I would data log pressure over MAF readings at least )


PS. Power FC is not the shit, Haltech is the shit.

$40 burner and $60 for daughterboard and chips - I've even done it for cheaper before.

Yes, robustness of a MAF setup. I've seen blown motors because something caused the VE of the engine to change, and the AFR leaned out. Very easy to do with a MAP system. Issues with a MAF usually cause a lean mixture. I can't count the number of standalones I've seen that for whatever reason did not compensate well for ambient temperature/pressure differences and had funky drifting AFRs, or didn't adjust timing due to temperature well etc.

I know very accurately where on the map a car will be at a given power level, it's just something you learn after a while and can do some basic math. Don't feel bad though, I've been doing the whole tuning thing longer than you have. hahaha

[jskateborders]

o nooooz
Tuner warzzzzz

[blu808]

Got pics of where you were doing 174mph?

main straight away at the san jose GP 2 years ago. Conrad grunewald was driving it at that point.

He said He hit 7200 rpm (limiter), but the radar gun from Champ car officials showed 174mph. which would be closer to 6950 rpm. Still fuckin fast for that small of a track.

[s13drob]

i think most cars can handle top speeds. all depends on suspension and downforce

[sillyvia13]

i think most cars can handle top speeds. all depends on suspension and downforce
yeah I have a sr power 240...s13...and at high speed sshe gets real light...
teh car tells me to slow down...at about 140 150...no aero at time...was front end more than rear...rear always feels light tho....

[jskateborders]

weird.. are these coupes that everyone is topping out?^^^
I went like 130 in my teg and it felt like it was gonna lose it.
145 in the s13 felt nice, solid, fully controlled.

[blu808]

110 in a 240sx feels like you are about to crash.


140 in my GTO feels like I can take my hands off of the wheel, set the cruise control, and text message people.


It is all about setup.

[GSXRJJordan]

140 in my GTO feels like I can take my hands off of the wheel, set the cruise control, and text message people.

Hahaha.

Def, Steve's point is that having something custom for your setup will always beat the "guess and check" ROM tuning that = 99% of the ROM tuning biz. I know you know your shit, and apparently have had great success with ROM tunes, but for the majority of people, a standalone tuned on a dyno will be reasonable as far as time and money, and perform close to ideal.

I used a GPS on my bikes when I used to care about top speeds, and hit a GPS-verified 202mph on my 2004 GSXR1000. Scary shit, but showing people the GPS's memory for 'top speed' and watching their jaws drop is fun.

[Def]

Def, Steve's point is that having something custom for your setup will always beat the "guess and check" ROM tuning that = 99% of the ROM tuning biz. I know you know your shit, and apparently have had great success with ROM tunes, but for the majority of people, a standalone tuned on a dyno will be reasonable as far as time and money, and perform close to ideal.


I've tuned standalones too, nothing against them, as they have cool stuff. They're just way more expensive than a daughterboard, which is really the only "hardware" you'd need to purchase if someone was tuning your car on the ydno.

I just don't see why you guys don't see an ECU as being capable of being ROM tuned on a dyno vs. a standalone. Yes, might not be an option for everyone, but there are more people out there that can tune Nissan ECUs than most think. I do agree that having something dyno tuned is preferable to a remote tune. I always want to see exactly how the car is behaving before going past a certain "point."

[93SECoupe]

110 in a 240sx feels like you are about to crash.


140 in my GTO feels like I can take my hands off of the wheel, set the cruise control, and text message people.


It is all about setup.

I have gone plenty of times past 110 in my 240 and never had problems with stability however the fastest I've taken it has been up to 140mph. Perhaps having a wide body kit, coilovers and wider tires 17x225 & 17x255 helps.

[blu808]

Prob. I used to drift my s14 at 110Mph no problem. But if I take my stock beater s14 on the freeway at 110mph I feel like im gonna die.

Again setup.

My ls1 turbo fc cant go straight at any speed under 140mph. Any speed over that is just ok. If I hit a little bump im dead. No question. Dead! The amount of unloading done by the tires, and suspension will ruin your day. lol

[s14unimog]

get a bike and stop driving your 240 that fast