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Old 03-15-2013, 02:29 PM   #656
Scooby Guru
Member#: 261612
Join Date: Oct 2010
Location: Minneapolis, MN
2002 WRX - 750WHP
9.5s @ 150mph


Originally Posted by sponaugle View Post
Here is a look at the 50-100 for my 08 STI. Full build details:

This is now running E85 on the pump tune with injector scaling changed. I'll do an E85 tune here in the next week and see if I can get a bit more out of it.

Vehicle: 2008 STI
Motor: Built WJ257
Turbo: EFR7670
Boost: 24-25.0 psi
Transmission: Stock 6-Speed
Redline: 7800

Cobb AP SD
Weight: 3450 lbs empty, with me 3648lbs
50-100MPH: 3.99 (24-25psi, 480ish whp), 4.99 (21-22psi 430ish whp)


You can see that the higher boost makes a bigger difference at the lower RPMs in 3rd gear. The slope once in 4th is almost the same.

I also did a run in 4th gear only, and indeed it is slower. The 60-130 might be different, and I'll be curious to give that a try.

Also, here is a look at boost for the faster run:


I really should turn on flat foot shifting.. that boost drop sucks.

Nice times. Must be a quick car! The comparisons are great to see as well. I think you could easily shave a few 1/10th's with a flat foot shift!

Originally Posted by Slimsti View Post
Wow Jeff thats sick man and some really detailed graphs. Nice post. Seems like you dropped a full second off 50whp. I wonder if that carries over through to other build and setups? Your making huge power for only 25psi, that turbo is pretty happy.
My car dropped about 1/2 second per 40WHP on Virtual Dyno. Loosing a full second with 50WHP is a bit surprising based on what I've seen, but all my testing was within a single gear.
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