293 awhp, 303 awtq. SAE corrected, dyno is at 5300' + elev., about 63* F, 18% humidity.Stock airbox and filter
XS Engineering downpipe
Test Pipe (no cat)
HKS Hi Power exhaust
Forge manual boost controller
Evo IX diverter valve
T-bolt clamps
Walbro 255 LPH fuel pump
21psi. according to DynoJet boost reading (supposedly high), boost gauge in car reads about 19psi, so not much over stock, if at all.
Don't ask why the chart only reads to about 6700 RPM. I wasn't driving so I don;t know. Maybe it was just falling off after that? I would have liked to see how much though...
We had some runs with more power (>300hp+) but started seeing a little bit of knock and some strange boost and hp/tq fluctuation, so we tuned rather conservatively. After about 9 or 10 pulls the car was getting pretty hot and we started to lose some power. It didn't look like we were going to get much better power during the session so we stopped there.
Driving away from the dyno facility I definitely had a boost leak at 5k RPM, which has since subsided for the time being, but this would explain some of the inconsistent numbers, and perhaps some lost power. I did a boost leak test just a few days before this and the pipes were holding 22+ psi pretty well, and only taper off after a few minutes down to about 17 psi where it would rest for 10 min+.
The car definitely feels significantly more responsive after the tune. Driving it really seems to reflect what the dyno sheet shows, more power sooner and smoother than before, with more at the top where it used to run out of steam, and a much more stoich and stable A/F ratio throughout the powerband. I was pleasantly surprised by the peak power and gains we made yesterday and am allot more confident in the car's performance. Driving it now, although we
produced pretty good peak gains, I am also happy about where in the RPM range the power was added. I am satisfied with the results we made for what I have so far, but not satisfied for the long run of the car though :) I'll be in touch with you in the future for more tuning.
272 cams are next, and I have some other special fueling plans underway.
