rb25det horrible dyno numbers?? what is wrong here????

[S14rb25k]

So i dyno yesterday and i was actually not surprise at all.

car made 362HP 282 lbs torq on dynojet @ 15psi

is that normal power for an rb25?
engine is heatlhy, good compression and no smokes or leaks.


Mods the car has as we speak:
S2 rb25det from r33 gtst full stock internals .
5 speed tranny with new act clutch 6 disc sprung clutch good for 555-600hp slight grind in 4th nothing crazy
Stock exhaust manifold modified to fit a v band wastegate
Precision 6765 turbo dual ball bearing.
40mm turbosmart wastegate
Full 3 inch exhaust with downpipe
Z32 maf with k&n filter
Front mount intercooler
Q45 TB
Greddy intake manifold
550cc injectors
Walbro 255 fuel pump
Yellow jackets brand new coils
Ngk brk7er plugs gapped at .30
Cusco oil catch can
Greddy boost controller
Aem tru boost gauge
Aem A/F wideband
10w30 mobil synthetic oil
Tuned with Greddy Emanage Ultimate with a PNP harness to stock ECU

car was tuned at on a dynojet. doing 4gear pulls, tuner said the car was either slipping on third or not gripping on the dyno wheels?? so he started doing 4gear pulls. i have a new clutch so i don't see how it can slip? but anywayz...

i attached some picstures, i have so vids also.... but overall i am a little dissapointed with those results.. anyone have a similar setup??? what numbers did you pull? any advice would be great! thanks.

[ChinkyChris]

Got better pics of the graph and wideband data? graph doesn't appear to have any slip (Tire of clutch)
Tuner should have been using 4th anyways... 4th is your 1:1 gear and will give true numbers.

[ChinkyChris]

Or if you want you can email me the graph i'll look it over.

[Kingtal0n]

The engine needs far more tuning. The air fuel line should be fairly straight. The torque should have a single slope up, and a single slope down, with a single gentle peak near the middle.

Oh, I just notieced you are using an E-manage. I hope the "tuner" informed you that your engine will not last long like that. I recommend you get a real computer.

As to the power, do some math

cid x rpm / 3456 * pressure ratio * .069 = corrected lb/min airflow @ 100% VE at the flywheel

so for your engine,
154 * 7000 / 3456 * 2 * .069 = 43 lb/min flywheel, *.85 (15% drivetrain loss) = 36 .5lb/min or 365 horsepower to the wheels
seems pretty on the money to me

STP is around the corner from me, I make pulls all the time there. I could tune your car if you got a real computer such as PFC/AEM/Haltech/etc but I wont touch the E-manage

[smoked240]

The injectors are quite small for the turbo but should push you over 400 easily. Why such low boost? That turbo should be able to handle 30psi if not more.

[S14rb25k]

the E manage ultimate was not my first choice. is what i got when i brought the swap. so its all i got to use at the moment. i'm saving up to buy a stand alone ecu! as far as the af ratio goes?? i dont know anything bout that i don't tune cars lol that is why im asking for advice. according to the tuner the car should be on a safe tune "and last" he told me i should not go over 16-17psi...... i have several vids of different pulls

first pull on the dyno was 319hp and 262 trq... after that the other several pulls went down from there.... until the last 3-4 pulls got me to the 362hp and 282trq the tuner said that's it..... that's all the engine can do on 15psi.....

prior to the dyno we did some street tuning like a week before.. because he had trouble finding a dyno to use. ima post pics of some of the other dyno graphs we got..

[S14rb25k]

this is some prior runs. i mean we did 17 runs.....

[S14rb25k]

the reason im a little disappointed there has been many rbs with similar setup running 15 psi and are 400+ so its all confusing. i just think my numbers are a little low. i could be wrong tho. the reason i pick to have an rb25 over an sr20 was to go over 400hp and have some decent torque without building an engine. The only thing that is pleasing me right now is the sound of the engine! lol as honest as i can be!

lol. makes me feel like throwing this RB piece of crap! in the garbage! and just boost an sr20...... lol. i don't see much difference from my friends with some booted sr20s making very similar numbers!

[largekid]

why such a large turbo? I'm using a considerably smaller turbo (PTE 5252E), and @17lbs on 93 I made 421...I broke on the dyno before I was able to run the 25lbs I was planning on as well as tune it for E85. I say I would be somewhere in the 500ish range.

[pugsonrugs]

you'll get better numbers if you run more boost(with bigger injectors and retune). they're kinda low because your turbo is too big to run lowish boost.

[mixeds14]

That's big turbo to just run 15# of boost. Small injectors and u need a better tuning device. Also u will need bigger injectors to be efficient with ghat turbo and a bigger fuel pump aswell. U would have made more power with your current set up using a 30r and a bit more boost.

[S14rb25k]

i got that turbo because its a decent size turbo to make good power... maybe its overkill... for this setup but still. i dont think the turbo is so the cause.

[largekid]

i got that turbo because its a decent size turbo to make good power... maybe its overkill... for this setup but still. i dont think the turbo is so the cause.
turbos have whats called an efficiency range. PTE does a terrible job in giving you the charts to properly size a turbo to a set amount of air flow. You could run a smaller turbo, with the same amount of boost. It would be closer to its efficiency range and would output way better than this one. To properly use this turbo, you are going to need more fuel, boost and a better tuner. Just cause the turbo is "capable" of larger power numbers, if you can't capitalize on it, it does you no good other than a part to brag about.

With all this said, 370 isn't a terrible number, as its probably a fun car at full boost, it could just be better....as anything can be ;)

[OutToWinPAHC]

Problems -

The method of tuning, you need a better unit.
MAF
Injector sizing vs turbo sizing
Big turbo for a t3 flange.

However the drivetrain loss number isnt linear so dont always assume 15 percent. On a single disk with RB25 bigbox account for about 65hp of loss on the rollers.

My r33 is on the dyno now with a 5858 full built car but looking to pass 515 at 25psi. Bosch 850s, ported head, ported greddy manifold, custom exhaust manifold, Kelford 272 9.35s, supertech valvetrain, 8.4 bottom end, AEM series 2 pump gas. Oh and comp flywheel with stage 4 clutch

My r32 with 3076 with RB25 neo (stock bottom, procams, stock manifold and 38mm external gate) looking for 440 wheel at 19psi. Ported head, Tomei 260 at 9.15mm procams, stock intake manifold, stock exhaust manifold with tial 38mm gate, 3076r, R35 550's with base at 52psi, comp flywheel, spec stage 3

I would suggest some ID1000s
More capable pump Stealth 340 or a 400lph
A real standalone (AEM, Vipec, Haltech, Link, maybe apexi d jetro (no L jetro, no nistune))
Greddy intake manifolds are convienient... they dont off much to gain.

[S14rb25k]

While we were on the dyno or even street tune , we had plenty of Injector left ... The car was running very rich most of the time . There was only a few times ! When it would lean out after 5-6 rpms but the tuner fixed that !Even now after tuned !! I still smell some fuel when I go full throttle ! So I think car still runs a little rich .i can feeling bogging out a little ... And it drinks gas like water lol ... I guess I'll just park it for now ... Till I get a better tunning device !!! I don't want to mess anything up with the Greddy Emanage ! Lol what a dissapoinment !

[smoked240]

While we were on the dyno or even street tune , we had plenty of Injector left ... The car was running very rich most of the time . There was only a few times ! When it would lean out after 5-6 rpms but the tuner fixed that !Even now after tuned !! I still smell some fuel when I go full throttle ! So I think car still runs a little rich .i can feeling bogging out a little ... And it drinks gas like water lol ... I guess I'll just park it for now ... Till I get a better tunning device !!! I don't want to mess anything up with the Greddy Emanage ! Lol what a dissapoinment !

I'm sure the tuner didn't feel confident enough to fully tune it. That turbo should be pushing way over 15psi and you should be at roughly 500hp if your injectors and pump can keep up. Af/r at 16,17?? Yeah sounds like he tuned really rich. I'm at 12.2 at wot but that's with E85

[S14rb25k]

here is a couple more pics.. sorry for the bad quality. they are pics of video clips

[S14rb25k]

why such a large turbo? I'm using a considerably smaller turbo (PTE 5252E), and @17lbs on 93 I made 421...I broke on the dyno before I was able to run the 25lbs I was planning on as well as tune it for E85. I say I would be somewhere in the 500ish range.

you broke on the dyno? like what broke? the engine blew? on 17 psi your making a lot more than me at 15 psi! am also tuned on 93 pump gas.

[slideslidegnarslide]

Smoked 240 you have afrs backwards 16-17 is lean as fuck

http://www.turbobygarrett.com/turbobygarrett/airfuel_ratio_tuning_rich_vs_lean

Just for reference.

Do not drive the car like that. That tune sucks balls. Close the gap on your plugs a little bit too. Get a real engine management system and take it else where

With e85 stoich should be closer to 9s. Just saying.

[S14rb25k]

Smoked 240 you have afrs backwards 16-17 is lean as fuck

http://www.turbobygarrett.com/turbobygarrett/airfuel_ratio_tuning_rich_vs_lean

Just for reference.

Do not drive the car like that. That tune sucks balls. Close the gap on your plugs a little bit too. Get a real engine management system and take it else where

With e85 stoich should be closer to 9s. Just saying.

yeah i have it parked now.i prob wont drive it much till i swap that gay greddy emanage ultimate. i been also talking to martin from RS enthalpy about getting some info to swap the ecu to a z32. i seen very good reviews and results by doing that!

[S14rb25k]

i was looking at the graphs and i notice at one time there was a pull that made over 300 trq??? why did that went down so much? and never went back up again? i don't have many experiences with dyno tunning so am sorry if am asking to many dumb questions.

also if the first pull from street tuning read 319 and 282 how come the next 7-8 runs from there went downhill like crazy????? is that normal when it comes to tunning? im prob assuming if you have somewhat of a map already it should get better from there up not go down ???

also how many pulls are average when it comes to tunning??? we did a lot! over 10 for sure! after a while i just got bored of hearing the engine roar and not be satisfy with power lol.

[supersayianjim]

Problems -

The method of tuning, you need a better unit.
MAF
Injector sizing vs turbo sizing
Big turbo for a t3 flange.

However the drivetrain loss number isnt linear so dont always assume 15 percent. On a single disk with RB25 bigbox account for about 65hp of loss on the rollers.

My r33 is on the dyno now with a 5858 full built car but looking to pass 515 at 25psi. Bosch 850s, ported head, ported greddy manifold, custom exhaust manifold, Kelford 272 9.35s, supertech valvetrain, 8.4 bottom end, AEM series 2 pump gas. Oh and comp flywheel with stage 4 clutch

My r32 with 3076 with RB25 neo (stock bottom, procams, stock manifold and 38mm external gate) looking for 440 wheel at 19psi. Ported head, Tomei 260 at 9.15mm procams, stock intake manifold, stock exhaust manifold with tial 38mm gate, 3076r, R35 550's with base at 52psi, comp flywheel, spec stage 3

I would suggest some ID1000s
More capable pump Stealth 340 or a 400lph
A real standalone (AEM, Vipec, Haltech, Link, maybe apexi d jetro (no L jetro, no nistune))
Greddy intake manifolds are convienient... they dont off much to gain.



hey, whats wrong with the nistune?? and if you want more voltage to your wally. run 12v directly to the pump, going through the car robs badly needed voltage, ask me how I know.

[mixeds14]

Nistune is not bad but it's old news compare to the stand alones of today, and u can really get down to fine tuning with a real standalone to achiive maximum power of your setup but acourse that all depends on ur tuner..
Op, u said u even smell it rich, please tell us have a wide ban n not goin alone on the smell and that tune u have..

[S14rb25k]

Nistune is not bad but it's old news compare to the stand alones of today, and u can really get down to fine tuning with a real standalone to achiive maximum power of your setup but acourse that all depends on ur tuner..
Op, u said u even smell it rich, please tell us have a wide ban n not goin alone on the smell and that tune u have..

yes,i have a AEM wideband installed. is hard to read my AF even at idle! that shit be jumping all over the place. i wish i could upload a vid here to show the wideband on idle and running it

[mixeds14]

Man save up for atleast a used fc djetro with data logit so u can go head and eliminate the maf. That wil allow u to tune and make more power down the road. And they are fairly cheap compare to a haltech ect.. Then get a stealth pump(under 200 bucks). And tune it till u come close to maxing out ur injectors. U should have a fun street car then. Wich 362hp is not bad but u will get used to it quick.

[AJZax]

just ditch the emanage. get an enthalpy tune.
Where are you located because the owner/tuner will fly and dynotune dyno groups. This gives you the same flexebility as a standalone. The mail order tunes are actually crazy accurate. On the dyno we added 1 deg of timing up top. My SR is 585 whp 470 tq. e85 , n62 maf GTX, no stroker no sleeves. 1200cc injectors. starts up better than my stock g35 lol. transient response is amazing, feels like a t28 up top.

aaanyway, you can try that route. Perhaps you can try

MAF vs MAP is another argument.
Think about something for a minute though. List 3 cars that are MAP from the factory, that are also factory turbocharged. Even honda went MAF on a turbo car.

MAF monitors the air mass with a single sensor and all thevariables affecting air mass are accounted for in the single sensor.

MAP uses multiple sensors to CALCULATE air mass with values, and changing anything that changes the VE will distort and inaccuraize your tune. If you can swing it maf is great.

[kikaku dorifuto]

I saw on one of the graphs you had Olympic motor sports tune your car. I'm wondering why you had a shop that is known only for their Subaru builds tune your RB powered car. There are so many other shops ( drag, premier, etc) in south Florida with proven RB builds. I'm just curious.

[S14rb25k]

I saw on one of the graphs you had Olympic motor sports tune your car. I'm wondering why you had a shop that is known only for their Subaru builds tune your RB powered car. There are so many other shops ( drag, premier, etc) in south Florida with proven RB builds. I'm just curious.

The reason i went there is because i was recommended by a friend! base on the fact he can tune greddy emanage! not a lot of tuners and shops in south FL do greddy emanage.

[mixeds14]

Lol @ mail order tunes. It's not an sr. Yeah some work great and some are crap, but it's not an sr, its an rb.
U can't tune an rb ecu. Might as well get nistune wich is a z32 ecu and have a type 2 board install.

[Tuloabe617]

There's nothing that I was going to say that hasn't been said... If on a budget, I have a 1990 NA Z32 ECU for the low low if you decide to go the Nistune route which is currently priced at $450 USD. That includes the chip, them installing the chip to the ecu, and a single user license software to tune it. All you need to do is ship it to Australia and they send it back.

I'm currently going nistune on my SR20 and having a local honda tuner take care of the tuning. The software is very straight forward. And they just got launch control!!

[S14rb25k]

I been thinking bout it and I'm just going to save up and find a used aem ems , or a used power fc sometging at a decent price ! Then go from there ... I also contemplated selling the car and moving to something else ... It's either going to have a 2jz or an rb26 . I think I had enough of this rb25 bull crap lol !

[Tuloabe617]

I like Nistune because it's definitely a good bang for your buck and using that phrase is rare when modifying cars lol.

I know some like to stay Nissan but when I'm finally done with these sr20s I'll be going 2jz. Yeah rb26 is the sh*t but on the 2jz Turbo is on the right side, 3.0L and if something breaks I can go to advance.

[largekid]

I been thinking bout it and I'm just going to save up and find a used aem ems , or a used power fc sometging at a decent price ! Then go from there ... I also contemplated selling the car and moving to something else ... It's either going to have a 2jz or an rb26 . I think I had enough of this rb25 bull crap lol !
If you are having issues with a RB25, what makes you think a RB26 will be any different? Or a 2J for that matter. Its all in the parts and tune man, get that lined out, then it will work no matter what motor you are using.
you broke on the dyno? like what broke? the engine blew? on 17 psi your making a lot more than me at 15 psi! am also tuned on 93 pump gas.
My exhaust cam snapped and I bent a couple valves.

My dyno chart before power pulls
http://i198.photobucket.com/albums/aa279/largekid02/Car/1421513416657_zpsxwhpyf3e.jpg (http://s198.photobucket.com/user/largekid02/media/Car/1421513416657_zpsxwhpyf3e.jpg.html)

[OutToWinPAHC]

The problems with nistune is your limited to maf oem sensors and oem tables, no boost comp tables. Its a decent chunk of money to tune and be limited to only tje stock ecu.

[slideslidegnarslide]

Yeah it's not the rbs fault. Plenty of people rock them reliably. Just be patient and get it done right. I understand how frustrating it is but it will all be worth it in the end

[S14rb25k]

If you are having issues with a RB25, what makes you think a RB26 will be any different? Or a 2J for that matter. Its all in the parts and tune man, get that lined out, then it will work no matter what motor you are using.

My exhaust cam snapped and I bent a couple valves.

My dyno chart before power pulls
http://i198.photobucket.com/albums/aa279/largekid02/Car/1421513416657_zpsxwhpyf3e.jpg (http://s198.photobucket.com/user/largekid02/media/Car/1421513416657_zpsxwhpyf3e.jpg.html)

am not having any issues as far as "issues goes" the car runs and pulls alright for now with the greddy emanage am sure once i upgrade to a stand alone it will get better results.

Well to answer your question about what makes me think the rb26 and 2jz will be different?.i just feel the car extremely under powered especially for a RB25 engine!
to make a funny joke :) is like seeing a body building guy all ripped WITH a tiny PENIS!! get what am saying LMFAO.

an RB26 is by far a better engine, there is no comparison between the two whatsoever. different heads, stronger internals etc.

"yes" the Rb25 is a decent motor for what it is... but i wont compare it to a rb26 or 2jz for any matter other than the fact they all inline 6.

i even don't feel that Rb25 is neither comparable to a 1jz for that matter.. those engine can hold 600-700 hp stock internals all day for years with just very simple bolt ons and of course a tune! That is prob the reason most 240 guys are swapping those engines in there now days.

after seeing those results and deeply researching on RB25 dyno number, reliability after 450-500 on stock internals and power it has fallen short to a lot of people expectations not to mentioned the fact they are notorious for killing ringlands and rod knocking.
AM not BASHING on any RB25, i mean i have one! but am just stating the facts! MAYBE im having a bad experience with one! or MAYBE my tuner could not tune the engine right? there is a lot of factors...

Your numbers seem very decent! way better than mines for that matter but the engine could not keep up with that power. that's why it broke. or maybe it was not put together right ? who knows?? sorry to hear that by the way!! i know the feeling of messing up an engine at the dyno it sucks!

the reason i went with the RB25 was because i found a great deal on the swap and it was hard to pass on. I mean i am not saying my engine is build or anything BUT with my list of upgrades even with a emanage I feel the car should have made 400HP easy with 15Psi.

Will see once i change to a stand alone if my prespective changes!???
i hope it will! one thing i do love! is the roar of the engine!

[S14rb25k]

this is the engine bay

[largekid]

am not having any issues as far as "issues goes" the car runs and pulls alright for now with the greddy emanage am sure once i upgrade to a stand alone it will get better results.

Well to answer your question about what makes me think the rb26 and 2jz will be different?.i just feel the car extremely under powered especially for a RB25 engine!
to make a funny joke :) is like seeing a body building guy all ripped WITH a tiny PENIS!! get what am saying LMFAO.

an RB26 is by far a better engine, there is no comparison between the two whatsoever. different heads, stronger internals etc.

"yes" the Rb25 is a decent motor for what it is... but i wont compare it to a rb26 or 2jz for any matter other than the fact they all inline 6.

i even don't feel that Rb25 is neither comparable to a 1jz for that matter.. those engine can hold 600-700 hp stock internals all day for years with just very simple bolt ons and of course a tune! That is prob the reason most 240 guys are swapping those engines in there now days.

after seeing those results and deeply researching on RB25 dyno number, reliability after 450-500 on stock internals and power it has fallen short to a lot of people expectations not to mentioned the fact they are notorious for killing ringlands and rod knocking.
AM not BASHING on any RB25, i mean i have one! but am just stating the facts! MAYBE im having a bad experience with one! or MAYBE my tuner could not tune the engine right? there is a lot of factors...

Your numbers seem very decent! way better than mines for that matter but the engine could not keep up with that power. that's why it broke. or maybe it was not put together right ? who knows?? sorry to hear that by the way!! i know the feeling of messing up an engine at the dyno it sucks!

the reason i went with the RB25 was because i found a great deal on the swap and it was hard to pass on. I mean i am not saying my engine is build or anything BUT with my list of upgrades even with a emanage I feel the car should have made 400HP easy with 15Psi.

Will see once i change to a stand alone if my prespective changes!???
i hope it will! one thing i do love! is the roar of the engine!

The problem with the RB and perception is who is handling them. Most think they can dump 1k into a motor and make 500. They want to treat it like a cheap SR, which it isn't. The failures most see with the RB25 is tuning related or using cheap parts (shortcuts).

My numbers were solid, I was happy with the graph and my tuner. It made the same power on the last setup, it has nothing to do with the motor giving out. I'm almost positive the timing belt tensioner failed, and the cam was seeing extensive downward pressure. How it broke shows that, and after I had the cams magnafulxed, it seems that makes sense as well.

What I recommend to you is either build up the rest of the car to that turbo, or build your turbo to your current setup. If it was me, I would keep the turbo, put a real fuel system on it, a real ECU/tuning system, and get a real tuner to set it all up. The other option would be to put a more efficient turbo on it, put a better tuning solution on it, and get a better tuner to mess with it.

PSS...the tuner comments are solely based upon the graphs I am seeing. They look sloppy, it could be based upon the emanage or whatever, but it seems off to me.

[S14rb25k]

The problem with the RB and perception is who is handling them. Most think they can dump 1k into a motor and make 500. They want to treat it like a cheap SR, which it isn't. The failures most see with the RB25 is tuning related or using cheap parts (shortcuts).

My numbers were solid, I was happy with the graph and my tuner. It made the same power on the last setup, it has nothing to do with the motor giving out. I'm almost positive the timing belt tensioner failed, and the cam was seeing extensive downward pressure. How it broke shows that, and after I had the cams magnafulxed, it seems that makes sense as well.

What I recommend to you is either build up the rest of the car to that turbo, or build your turbo to your current setup. If it was me, I would keep the turbo, put a real fuel system on it, a real ECU/tuning system, and get a real tuner to set it all up. The other option would be to put a more efficient turbo on it, put a better tuning solution on it, and get a better tuner to mess with it.

PSS...the tuner comments are solely based upon the graphs I am seeing. They look sloppy, it could be based upon the emanage or whatever, but it seems off to me.

yeah i am keeping my turbo! for sure lol. i can always use it on another engine if i ever change! swap.

i have a lot of money on just upgrades alone! not to mentioned the cost of the engine! is well over 6-7K on the easy side... to put a lousy 362HP on the ground LOL. that is why i am soooo frustrated! But like everyone here said! i will change the E manage to a better ECU/get 750cc or 8500cc injectors/get a better pump and will get someone more familiar with RB's to tune my car. hopefully then i wont think i wasted so much money for nothing. RB parts are freaking expensive lol.

with 6-7K i could have boosted an sr ,KA or even get a 1jz and be putting better numbers than 362hp on the RB25. But looking at your dyno sheet it gives me hope that it can be worth it.

what exactly was your set up????? when you dyno those numbers??? and im guessing it was a stock engine internally right? am trying to see what did you had extra other than a better ECU to get to those numbers!?

[largekid]

yeah i am keeping my turbo! for sure lol. i can always use it on another engine if i ever change! swap.

i have a lot of money on just upgrades alone! not to mentioned the cost of the engine! is well over 6-7K on the easy side... to put a lousy 362HP on the ground LOL. that is why i am soooo frustrated! But like everyone here said! i will change the E manage to a better ECU/get 750cc or 8500cc injectors/get a better pump and will get someone more familiar with RB's to tune my car. hopefully then i wont think i wasted so much money for nothing. RB parts are freaking expensive lol.

with 6-7K i could have boosted an sr ,KA or even get a 1jz and be putting better numbers than 362hp on the RB25. But looking at your dyno sheet it gives me hope that it can be worth it.

what exactly was your set up????? when you dyno those numbers??? and im guessing it was a stock engine internally right? am trying to see what did you had extra other than a better ECU to get to those numbers!?
7k, thats it ;)

My car is a S1 RB25, .040 over, pistons, full hardware, greddy IM, PTE 1200s, complete fuelab setup, haltech, flex fuel, top mount, etx etx. Its a complete build. Now i'm in process of building the head so I can get it back together and go play with some fools. I've never really posted on here much cause i'm usually annoyed with the members, but i've been searching for deals on parts and your thread caught my eye. Maybe i'll put up a build thread on here.

[dbeiler]

this is the engine bay

Please tell me those are not radiator clamps on the fuel lines. Also, that 90 degree silicone elbow connecting the turbo to the hot side intercooler piping is a huge NO-NO. It'll be just fine when you're cruising the strip, but someday when you're pushing the car on boost, that silicone elbow will split and crack giving you a huge boost leak.

[S14rb25k]

im taking some of the graphs out..... i need image space. im posting thecar for sale! to test waters! so if anyone wanna see the graphs just PM me ill send by text!

[slideslidegnarslide]

Don't do it. You are so close and you won't get the money you deserve with it running like crap. That thing will easily make another 100whp or more with a retune and turning the boost up.

[AJZax]

RSEnthalpy uses z32 ECU and yes you can tune them. Last session we made 310whp on a stock RB25
dyno session before that 440whp on another RB25.

You're in florida, take it to RS-Enthalpy's shop and have them tune it. Seriously. I promise you'll be happy. He's one of the most experienced and most respected nissan tuners in the industry. He's done hundreds of RBs.

RS-Enthalpy can dynotune the the "mail order tunes"....
And FYI a lot of the mail order tunes are actually dynotunes of the same setup.

With enthalpy dynotuning it's pretty much as flexible as a pfc for N62 MAF. N62 MAF can flow 600whp. Mine is flowing 583whp. So rumors of them maxing out of 400whp is total forum bs. A big problem people have is setting the mtoo close to the turbo suction, as there is vortex air turbulence from the intake of the turbo which causes false maf readings. I have a 4" suction pipe and MAF is roughly 14" away from turbo inlet and it runs with no hiccups at all.

[rastaman]

^^Damn stock rb make 310hp ? I didn't know that..

[Kingtal0n]

IMO mail order anythings go against the nature of the 240sx, as this car is completely hands on, do it yourself, shits gonna break often and need maintenance. In three months I've replaced at least 10 parts on my car that mileage wore out.

The more stuff you let somebody else do for you, the less you learn, the less hands on it becomes. You wouldn't let somebody else change your plugs. You might as well be paying somebody else to drive it too.

Also btw stock manifold .... just saying.

[TXRB]

My rb25 is stock and im shooting for the 300 whp mark. im tuning it myself and so far i love my adaptronic select pnp ECU. still have a few things to do before i can shoot for max HP/torque but its awesome the amount of control you have with a stand alone. there is no substitute. next thing on my list is wiring in the denso pencil coils because my stock ones are shot.

[OutToWinPAHC]

Yesterday my r33 on a 5858 made 501 wheel at 22psi. Was shooting for 25 psi but 85÷ duty hit first

[AJZax]

pretty much all the features for adjustability on an enthalpy ecu are the same as stand alones, it's just with a standalone you do it yourself.

Tuning theory is "simple" 'ish'. There's plenty of factors people don't think about, but that's a different subject entirely.

All engines run on ignition and fuel maps, and there is plenty of adjustability for a 4 cylinder to support close to 800whp with street manners still on the ROM tune ecu (Enthalpy).

My 585whp 470tq SR starts better than my G35 (stock) and idles, and has t28 throttle response in its efficiency band. The adjustability is comparable to a power fc to really simplify it.

I am a very do-it-yourselfer.... I make cages, tube fronts, over fenders, knuckles, LCAs, turbine outlets, random flanges and blabla. I still will only tune basic setups. I hand it off to martin, as he has more experience and know-how in tuning. 15 years of experience and thousands of cars, will not be made up by me doinking around for 200 hours on a couple 600hp cars lol.

Tuning is really fun. Good thing to do is tune it the best you can, then have martin or another really good tuner check your tune on the dyno to see how you did.