On 01/05/07, Herbert Graf wrote: > > Note that the hp figures in NA > differ from those in Europe since North America measures horse power at > the flywheel: AFAIAA, all car manufacturers quote flywheel power - i've never come across them quoting anything else. Rolling road or axle type dynamometers measure wheel horsepower- which is usually quite a chunk less than flywheel power (due to losses in the gearbox and transmission). Many car owners and dyno operators have "formulas" (usually based on invalid assumptions) to "convert" back to flywheel horsepower. It's all about how big is my ****. Jon -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist