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...NO current engine computers actually determine or calculate engine horsepower, that's a derived value that needs to know engine torque vs. rpm. The only exception I know of is the Bugatti Veyron, but I don't know how they do it.
...most add-on devices simply 'estimate' HP from other inputs, and are almost guaranteed to NOT be accurate...close, sometimes, but almost always somewhat in-accurate 100% of the time.
Last edited by gone-ot; 06-05-2010 at 09:53 PM..
Reason: added reference to Bugatti Veyron.
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