Reply to "engine dyno vs chassis dyno"

joules"Racing is Life, anything before or after is just waiting" - Steve McQueen

Daniel,

I think most chassis dyno's report 'to the rollers' numbers, at least the ones around here do. That said to make an 'apples to apples' comparison we all need a standard set of criteria to compare to and elevation is probably one of the biggest factors in that with 3% HP (generally accepted) loss per 1000 ft elevation. So at our local Carson dyno (~4,700 ft) I'd get about 15% less than someone at sea level, which I well believe as at Monterey last year my car was noticeably different. Some guys have to re-jet the carb to go.

We also have a guy here who ran 510HP at the rear wheels on the same dyno (i.e. at 4,700 ft), he can get away with 12:1 comp and pump gas at these elevations.

The drivetrain loss in Pantera is 19-20%.

Julian

6/20/074:51 PM

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