Quote:
Originally Posted by neovb
I had my car dynoed earlier this week (Saturday the 22nd) at Moore's Automotive in Fairfax, VA. The car put down good horsepower numbers, however the technicians there were not able to get a torque reading as they could not pull an RPM signal. Three runs were conducted using a DynoJet dynamometer. All readings were done in 4th gear. Mods to the car are JBD set at 100% and intake with heat shield.
Run 1: 319.27 WHP
Run 2: 328.27 WHP
Run 3: 328.61 WHP
In order to get a torque reading, I took the car today to Mach V motorsports in Sterling, VA. They use the same DynoJet however they were able to pull a RPM signal from the ECU. We ran the car in both 5th and 4th gear, same car mods aside from one run done with the JBD set a 0%.
5th gear:
Run 1: 296.88 WHP, 474.31 WTQ
Run 2: 299.58 WHP, 468.57 WTQ
Run 3: 299.01 WHP, 465.29 WTQ
4th gear:
Run 1: 300.17 WHP, 445.08 WTQ
Run 2: 301.51 WHP, 442.44 WTQ
Run 3: 267.16 WHP, 415.57 WTQ (JBD set to 0%)
Ignoring the 5th gear runs (comparing directly to the 4th gear runs at Moore's Automotive), there was a ~28 WHP difference. I'm not sure why there is such a big difference, and its not clear which reading was the most accurate. Since the results were measured on the same machines, Mach V generally attributed the horsepower difference to the car itself (i.e. ECU adjusting fuel/timing differently today than on the previous run).
However, I can say that I'm pretty happy with a wheel torque of 474 ft/lb. It is interesting to note that the car makes substantially more torque in 5th gear vs. 4th gear - this being attributed to more engine load in the higher gear.
I dont have a scanner, so I cant upload the printouts. I'll try to get them scanned in soon so that you guys could actually see the HP/TQ curves.
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How did they get the rpm signal from? I'm currently on a dynojet and can't find the rpm signal.