My stock RB25 whp

Discuss the RB20, RB25 and RB26 series engines.
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Neejay
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I made 231whp on a dynojet. I have a 3" syko turbo elbow -> 3" SR downpipe -> 3" resonated test pipe -> 3" N1 Duals.

Does that seem about right? Stock boost, smic, apexi power cone filter.

EDIT: I was only running 5psi boost (wastegate hooked directly to intercooler piping, no boost solenoid). I'm running 10psi now I didn't have my boost gauge hooked up yet, so I didn't know it at the time of the dyno.
Modified by Neejay at 7:15 AM 4/20/2009


Cjmartz2k
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Sounds a *little* low for a dynojet, but about right on a mustang dyno.

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Neejay
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Cjmartz2k wrote:Sounds a *little* low for a dynojet, but about right on a mustang dyno.
Damn, really? One thing I need to check is my fuel pressure. I really want to get a Power FC but I was told that the base map that comes pre-loaded wasn't one to drive on.

Bah...

black240jl
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that does seem about right.., mod it and get more hp

Joe
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Cjmartz2k wrote:Sounds a *little* low for a dynojet, but about right on a mustang dyno.
thats about right for a stock boost RB25.


Cjmartz2k
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I see the stock boost thing now. I think I just assume everybody notches it up a little as the first thing they do. Yeah, numbers look normal.

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ANVIL
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Neejay wrote:Damn, really? One thing I need to check is my fuel pressure. I really want to get a Power FC but I was told that the base map that comes pre-loaded wasn't one to drive on.

Bah...
my basemap PFC, dynoed 180whp

after it was tuned it did 265 on 12psi, 288 on 14. all on 90 oct

your numbers seem right

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meet07
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remember 30% loss from motor hp. i beat on a cold nite it feels faster. usually when its cold, with exhaust upgrade you get like an extra pound or two. i too say turn the boost up to at least 10psi. 12 if u wanna really hear the 25 wake up. lite weight fly and 6 puck is a must. : )

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Neejay
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Cool, thanks guys. I just wanted a baseline dyno before I started modding. lol
ANVIL wrote:
my basemap PFC, dynoed 180whp

after it was tuned it did 265 on 12psi, 288 on 14. all on 90 oct

your numbers seem right
LOL So he was definitely right. He told me that the baseline map was to "make it driveable to get it tuned"

I'll probably get a RB20 actuator.

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Neejay
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meet07 wrote:remember 30% loss from motor hp. i beat on a cold nite it feels faster. usually when its cold, with exhaust upgrade you get like an extra pound or two. i too say turn the boost up to at least 10psi. 12 if u wanna really hear the 25 wake up. lite weight fly and 6 puck is a must. : )
I have a competition clutch lightweight flywheel and a competition clutch stage 2 clutch

Cjmartz2k
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meet07 wrote:remember 30% loss from motor hp.
That's way high on the correction factor. A manual transmission is like 10-15%, and an auto is like 20-25%. Maybe if you had a full time AWD automatic or something like that

l0nestar
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Neo has ~25-30 chp more, so estimate around ~250 whp. ?

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Neejay
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Bumping it up to inform that I was only at 5psi at the time. I didn't have a boost gauge, and I was running my wastegate directly from the intercooler pipe (5psi without the boost solenoid).

I'm running 10psi now and it is a lot faster. lol

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Carl H
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ive seen a neo pull around 260whp on stock boost (6ish psi) on a dyno dynamics dyno...sounds like a good start tho!

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Neejay
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Carl H wrote:ive seen a neo pull around 260whp on stock boost (6ish psi) on a dyno dynamics dyno...sounds like a good start tho!
Thanks man!

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8gti9
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what do you guys think my hp will be (rough estimate) on my rb25 s2 will be?

mods are:

fmic 3" sr dp3" full cat back exhaust w/o catgreddy intake manifoldfpr boost set @ 11-12psi


Modified by 8gti9 at 10:32 PM 4/20/2009

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lucky7
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depending on dyno, i'd estimate 270-290hp.

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Tenchuu
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stock boost:

10 PSI

with a HKS pop filter, 3" outlet pipe back, and a FMIC. 300z na oem clutch too.

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Neejay
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Tenchuu wrote:stock boost:

10 PSI

with a HKS pop filter, 3" outlet pipe back, and a FMIC. 300z na oem clutch too.
Sweet! Thanks a lot for that. We literally have the exact same mods (3" turbo back, Apexi cone filter, FMIC [hooking/fabbing now], 10psi), and I went to a DynoJet and the next one is a Dynojet. So I guess it's safe to say I'd be at least 260 to the wheels if I can't make it to this next dyno day.
Modified by Neejay at 9:43 AM 4/28/2009

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Tenchuu
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note those are all uncorrected numbers.

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virus77
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Is that on stock ecu, looks crazy lean but I remember my stock sr20 ran retarded lean like that until high rpm... I dont like factory tunes one bit

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Tenchuu
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late reply: was having break/misfire issues so it looked lean. for future searchers:

Now with a HKS filter, HMIC,greedy IM, Q45 MAF lightened flywheel and 6 puck clutch. tuned with Nistune on Z32 ECU, 12PSI stock 10% ethanol gas on a dynocom dyno.

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Last edited by Tenchuu on Mon Jun 11, 2012 10:59 pm, edited 1 time in total.

RRRRB
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This was 11psi with a stock s14 exhuast system and no tuning what so ever
had a Cone style filter on it
FMIC and greddy intake manifold

The pull with higher torque was 4th gear the other was 3rd gear



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