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We have a chassis dyno that we use to tune, On motors that we have engine dynoed and then chassis dynoed depending on the converter have been from 21-28% loss difference. With a stick it has been 18-20% loss This is not something i live by but just reference. The chassis dyno should only be for tuning and not see what THE NUMBER IS. I dont care what the number is I tune to see if there is any more. We also determine if converter is right for the outcome.


This sounds like a calibration difference between dyno's. 28% loss - ask yourself where is it going ?? I would love to believe that my 928 RWHP dyno pull yesterday could be actually that much higher at the crank.

Allan G.

1970 Challenger w/572 Hemi street car and my pride and joy. 1986 T-Type with 272 Stage 2 Buick V6 engine - True 8 second street car. Just updated the engine and put down 928 HP @ 35# boost to the ground on chasis dyno. 1976 Cee Bee Avenger Jet Boat - 460 Ford powered.