I went back to TurboXS today for another dyno run. This time I had my ATP racepipe in. When I first arrived I had about 1/8 tank of 94 octane. After several runs we put 1/2 tank of 100 octane unleaded race fuel (CAM2 GT 100).
I was a little dissapointed with the results. The racepipe didn't seem to make much difference at full boost. There is a little more HP from 3000 to 4400 rpm, but not at peak power. (Hector, you were right man.) The power curve is a little smoother tho'. The torque is hard to compare, since the HP is SAE corrected but the TQ isn't. The weather today was warmer and more humid than the first time I dyno'd it, so the results are probably a little lower today because of that.
Interestingly, we ran the car at stock boost (12 lbs) for one run, and it measured 240 HP, so it's possible the exhaust mods are accounting for that extra power, but it doesn't seem to make a difference at full boost. The speculation is that most of the resistance in the exhaust system is catback, but time will tell.
The 100 octane fuel allowed me to run a little more boost and gave me about 8 more HP, but it seems that the ECU is not able to take advantage of the better fuel. Perhaps the timing advancement is already max'd out.
Anyway, it was worthwhile for the learning experience alone. It's going to take us awhile to figure out what makes this car tick.
Later,
Dan
Bottom line, today's measurements: 265.3 WHP (SAE Corrected), 293.4 WTQ.
Legend:
Dashed red line: My baseline run on 4-18.
Dashed blue line: My run today with no cat + 94 octane + 16.6 psi boost.
Solid red line: My run today with no cat + 100 octane + 18.1 psi boost.
http://import.h8rs.com/drolander/2003-04-26-TXS-HP.PNG
I was a little dissapointed with the results. The racepipe didn't seem to make much difference at full boost. There is a little more HP from 3000 to 4400 rpm, but not at peak power. (Hector, you were right man.) The power curve is a little smoother tho'. The torque is hard to compare, since the HP is SAE corrected but the TQ isn't. The weather today was warmer and more humid than the first time I dyno'd it, so the results are probably a little lower today because of that.
Interestingly, we ran the car at stock boost (12 lbs) for one run, and it measured 240 HP, so it's possible the exhaust mods are accounting for that extra power, but it doesn't seem to make a difference at full boost. The speculation is that most of the resistance in the exhaust system is catback, but time will tell.
The 100 octane fuel allowed me to run a little more boost and gave me about 8 more HP, but it seems that the ECU is not able to take advantage of the better fuel. Perhaps the timing advancement is already max'd out.
Anyway, it was worthwhile for the learning experience alone. It's going to take us awhile to figure out what makes this car tick.
Later,
Dan
Bottom line, today's measurements: 265.3 WHP (SAE Corrected), 293.4 WTQ.
Legend:
Dashed red line: My baseline run on 4-18.
Dashed blue line: My run today with no cat + 94 octane + 16.6 psi boost.
Solid red line: My run today with no cat + 100 octane + 18.1 psi boost.
http://import.h8rs.com/drolander/2003-04-26-TXS-HP.PNG