318Whp 13psi T-25 and stock injectors

[Initial_R90]

buddy of mine who i sold my old engine to that i never finished , just got his car tuned yesterday apparently it makes 318Whp on a dyno dynamic's dyno 13psi the mods i did to it

Sr20det Red topFull rebuild all new seals cometic Headgasketnew timing Chainport matched head JUN cams 264in/264exh 11.5 liftJUN stage II valve springsJUN tit. retainersGreddy Rocker Arm stopersNismo adjustable FPRZ32 mafGreddy suction kit for Z32 mafKoyo Rad HKS HI Power catbackMegan Racing test pipeComp Stage II clutchComp 14.5lb flywheelApexi Neo AFCStock turboStock injectors

Now my question to you dose this sound correct for the mod and Psi?it was tuned at MRC motorsports there a 350z/g shop and do subaru's.He was also told its starts boosting at 2400 rpm's and holds till 7000 and can rev to upwards to 8500.

Feedback would be great my guess was around 260-270 whp but who knows power to my buddy

[adrianfromthecastle]

thats unbelievable

[Initial_R90]

i know i thought the injectors would max out by like 260ish. I dunno i'll post the dyno sheet monday when he picks up the car. Funny thing that head setup is 1800$ and i got it for 600 maybe thats the mystery HP adder sold him the whole thing for 4,000$ guess he got a steal if he's making that much power.
Modified by Initial_R90 at 12:55 PM 11/29/2007

[Hijacker]

I'm totally shocked. The stock injectors shouldn't be able to flow enough for over 250 whp.

If he just cranked the fpr up to get more out of the stock injectors, hes gonna be sorry. He'll make 318 for about a day.

The sum of the parts shouldn't equal a horsepower increase like he's seeing. With those cams, I'm surprised the turbo builds boost that low.

[Initial_R90]

who know's we'll see monday , i'm taking my Z there next month for a NA tune i was told i can gain upwards to 20 HP from UTEC with tune

[Hijacker]

Nice. Ask that dude for a copy of the dyno sheets.

Just out of curiosity, was the bottom end left alone?

[Initial_R90]

yeah the clearnce's on the crank were perfect, if his injectors were maxed out what would that cause detonation?
Modified by Initial_R90 at 2:22 PM 11/29/2007

[idahotuner]

to much heat not enough gas. jsut a guess

[Hijacker]

if the injectors are running over their max duty cycle, you run way lean and start detonating. On an SR that will destroy the ringland first or possibly melt the piston on the intake side. The stock SR pistons are strong, but they can only take so much abuse. They run great to 400 so long as you don't go outside of perfect air/fuel mixture.

It's a common side effect of the crank the boost mentality. I have personally pulled apart half a dozen motors where someone added more boost than the stock fuel management could handle and melted a piston (or three in the case of my rebuild project)

[Emperor_Tha]

add water injection . it would make it safer with stock injectors.

[Initial_R90]

great idea i think he was planning on doing that

[Emperor_Tha]

does he have greddy intake manifold....i was planning on using jun head stuff for mine.

[Initial_R90]

stock intake mani just port matched with head

[CMG]

Hopefully your friend is planning on getting bigger injectors and turbo soon.

[DrifterProdigy85]

Settings on the dyno were off. A guy on Fresh Alloy had the same thing happen. He dynoed his GT30R setup and made like 500whp @ 17psi on a dynodynamics. The owner realized after the berometric reading wasnt set right so he re dynoed and did 388whp @ 17psi. So tell your friend to hop on another dyno elsewhere or have the owner recalibrate his dynodynamics. Dynodynamics also reads 13-15% lower then a Dynojet when calibrated right. This would mean your friend would have did 365+whp on a dynojet. So hard to believe its impossible.

[Initial_R90]

think he's getting it back today so ill post sheet if he gets it

[Emperor_Tha]

dyno sheet yet. i just install the z32maf, big noticable power increase on stock boost.

[Initial_R90]

Z32 maf is not gonna Add power just lets you have 500HP max insted of 250

[idahotuner]

I am not so sure about that. it might give you soem notice able power. becasue look at the diameter of the stock MAF and then look at the Z32 it is twice the size, so the intake air isnt bottle necked going through it, which seems like it would add more HP some how

[Emperor_Tha]

it was a big noticable difference when i swap it in. mainly in the 2500-4500 rpm range. well i retune it myself

[idahotuner]

that is sweet. i was goign to ask if you got a retune to compensate for more air flow

[DrifterProdigy85]

I am not so sure about that. it might give you soem notice able power. becasue look at the diameter of the stock MAF and then look at the Z32 it is twice the size, so the intake air isnt bottle necked going through it, which seems like it would add more HP some how

Z32 MAF wont help make more power on stock T25. The compressor inlet of the T25 is very small at 2.5" i think, which the inlet elbow and rubber intake pipe to the stock MAF are all the same 2.5" diameter. There is no bottle neck running the same size piping all the way. Alot of peoples setups get bottle necked when they upgrade there turbo and it has a 3" inlet but they continue to use the 2.5" intake pipe and a 3" Z32 MAF.

[Emperor_Tha]

you are correct about how it bottle up at the end. however the greddy super suction pipe is not as restrictive as compare to the stock rubber hose. the airflow is more smooth and also the car is more responsive.

with the stock maf, i have to take out fuel through out the rpm band. avg about -10 to -15. but with the z32 maf i have to add 0 to +7. a/r running 11.8 from 3500- 6500. full boost at 3500 at 7 psi.

[IanS]

Dyno sheets?

[idahotuner]

dyno sheets would be sweet.

[Initial_R90]

sorry gonna be sometime this week turns out we melted his wiring harness running it around the back of the motor

[idahotuner]

oh wow not good. i am a little worried about melting mine as weel. but i dont thin k iwill be running it any where super hot.