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Old 01-14-2009, 12:11 PM   #18
Scooby Specialist
Member#: 143264
Join Date: Mar 2007
Chapter/Region: RMIC
Location: Utah
2006 WRX TR
Obsidian Black Pearl


Originally Posted by RallySport Direct View Post

After doing the re-tune for the intake, we ran into another problem. The 65mm cat back on the car started backing up the motor in the higher RPM(past 6K), not allowing us to run more then 18degrees of timing. The boost is set at 22PSI tapering to 17psi by redline. Giving a safe and conservative tune, that will make the car easy to drive at the road course. So next up will be a 3" cat back, and the power should jump up another 15-20WHP! Then add a larger TMIC, and another 10WHP or so will be had

First off you say 22 psi. The dyno says 20.8 Kirill you are at 21 psi if you round up, not 22. Conservative would be 19 psi peak tapering to 17 at redline and 15 degrees of timing advancement. Your not on a "conservative" tune for 91 octane pee gas.

I am glad that you are happy with your tune. Now get the proper supporting mods!!!!

I don't mean to be a critique Kirill, I just like to give you crap. Kind of like how Les likes to give me crap about my Dom III.

Edit: Kirill remember when I said that for some reason Cobbs dyno always gave the same power numbers when You use my formula for torq and hp. Peak boost multiplied by 15.2 equals peak torq. and peak boost at redline multiplied by 18.2 gives peak hp +/- some 5-10 torq/hp. give it a try... 20.8 x 15.2= 316 (you were 311) Your dyno shows about 16.5 psi at redline... 16.5 x 18.2= 300.3 (you are 297) seems pretty accurate. The formula also works for the stage 2 dyno you posted. Looks like they have it calibrated back to the old calibration bud.
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Last edited by Stames_wiltz; 01-14-2009 at 12:19 PM.
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