Made the switch to XFI and had it tuned on the dyno (thanks Cal). There was a problem with the rpm pickup so the dyno operator switched over to the roller pickup. The rpm readings were a few hundred rpm low. I have the XFI logs and I know what the actual rpms were from the these logs.
I know that the dyno measures torque and uses the rpm to calcualte HP with the formula:
HP=Torque x RPM/5252
I have the dyno logs and corrected the rpms to what was recorded on the XFI logs. With the new rpm I recalculated the HP with the above formula. Anyone see anything wrong with this? Get more HP since the rpm was actually higher for each torque reading. But more importantly, the shape looks more reasonable and I can use it for looking at my power curve.
I'm surprised my power starts falling off so soon, thought it would have pulled to a lot higher rpm. I have a 224/224 roller cam, T&D 1.55 roller rockers, GN1 heads. Running a PTC converter.
The good news is that it made quite a bit of power on 93 and alky at 24lbs boost, 18-19 degree timing. The pics are the original dyno, a dyno with the rpm corrected and new HP calculated, and the XFI log.
I know that the dyno measures torque and uses the rpm to calcualte HP with the formula:
HP=Torque x RPM/5252
I have the dyno logs and corrected the rpms to what was recorded on the XFI logs. With the new rpm I recalculated the HP with the above formula. Anyone see anything wrong with this? Get more HP since the rpm was actually higher for each torque reading. But more importantly, the shape looks more reasonable and I can use it for looking at my power curve.
I'm surprised my power starts falling off so soon, thought it would have pulled to a lot higher rpm. I have a 224/224 roller cam, T&D 1.55 roller rockers, GN1 heads. Running a PTC converter.
The good news is that it made quite a bit of power on 93 and alky at 24lbs boost, 18-19 degree timing. The pics are the original dyno, a dyno with the rpm corrected and new HP calculated, and the XFI log.