Wandered across this

[JasonZ34]

I know ben will love me for this one but I don't post in GP forums cause they bore me..

http://www.intense-racing.com/shatter.html

[RacerX11]

Good numbers, but I don't agree with their claims of 670 HP. Anyone who makes chassis dyno runs and claims crank HP figures has their head up their ass. They just took the WHP numbers and scaled them up using 20% for the drivetrain loss figure. This isn't very accurate, especially at these power levels.

Also, note how all the dyno plots are versus speed (mph) instead of engine speed (rpm)? They claim they couldn't get engine speed or torque numbers due to a dyno error. This is BS. The Dynojet measures wheel torque, and scales it back to engine speed to get engine HP and torque. If there was not a valid engine speed reading, the HP numbers are not accurate.

Marty

[3100 MPFI]

When I dynoed my car, the MPH dyno was WAY off. My car surges when it shifts gears, so it was saying that my car had 280 HP at the WHEELS. When reading the dyno chart, however, it was just the spike when it shifted.

[GPXSS]

winpep is the worst software ever.. they should have scanned the printouts from the dyno facility.