Dr. Dynamics

Just want to know your guys opinion on how much hp a 2.5L 951 with the following mods should be doing

- Vitesse Stage III turbo Kit w. fuel management/MAF etc...
- Lindsey 4" full exhaust
- lindsey Wastegate
- Custom Head Port w/ racing springs and 5 angle valve job
- Matched Ported Stock Intake
- Lindsey fuel rail & Pump
- SFR Stage I header
- SPEC Clutch
- Raceware studs (low and high)
- AFR = 12
- 21 psi boost

toddk911

350whp

pete95zhn

Let me make a wild guess based on your write-up:

Not as much as you thought it would do...?? Like 330 rwhp?

wi54545

At 21psi? 400

Landjet

I have some other internal and external mods you don't have but it's pretty close to the same stuff. I hit 360 HP at the rear wheels running 18 psi of boost and still have a miss that I can't figure out, so there is still room for improvement. You should easily get my numbers at 21.

cantresjr

Sounds like Juancho's car

SoloRacer

My car made in the range of 300 rwhp at 15 psi with a Vitesse Stage III, SFR Exhaust, Stock Head. I believe John says to expect 13 rwhp per each psi of boost over that which should put you in the 350-375 rwhp range. Just a guess.

MPD47

400whp +/-

From someone who owned that turbo.

Here is a chart from me, except I had a crank trigger miss that day which caused us to call it quits on the dyno (my own stupid fault).


That was 20psi(?) if I recall correctly. Less intake/head mods than you, but MAP/Tec3R instead of MAF.

RolexNJ

So Mike, were your mods the same as is - apples to apples? Or no. And man, you guys kill me with scanning these dyno charts, I can't see crap. It's dark, no RPM to see, and no A/F plots too. Then again pal I can't blame, for this is pretty much the norm around here somtimes, no offense pal.

hosrom_951

If i recall, ST pushed out just a tad over 400whp at 25psi (race timing + xyline) on a bone stock engine. With you're uprades (exhaust + head) you should be pushing in that ball park with the same ignition/fuel and 21psi boost or so.

*just thinking out loud*

MPD47

I never scanned it as it was a crap chart. When I have a CLEAN chart, I'll scan one with all the info.

As for mods, it was
Lindsey Rail Kit - 72# Hour injectors
Vitesse Stage III
Tec3R - MAP Sensor - Coil packs
Lindsey 3"
Spec clutch
Lindsey Stage V

Everything else was stock IIRC. So he has a bigger exhaust, worked head/intake over what I had. But I was running different management/spark.

Porsche-O-Phile

Isn't the AFR of 12.0 a bit rich?

Porsche-O-Phile

With a k26/6? That sounds wildly optimistic, IMO.

You might get 25 psi with a k26/6 (IIRC Laust Pedersen did this to test out some water injection stuff a while ago) but at that point the turbo is so totally inefficient and is making so much heat it's probably a detriment rather than a benefit.

MPD47

Jeff, no, stock engine other than Turbo/managment/MAF/injectors is what he means.

hosrom_951

Jeff, as Mike pointed out, i missed out on something....

A VR Stage 3 Kit on a bone stock engine (stock internal block/head/valves, exhaust system + headers).

For obvious reasons, the injectors were not stock (72lbs at that time i believe).