Thread: M3 dyno
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      02-22-2013, 03:11 PM   #6
GIdriver
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Quote:
Originally Posted by CanAutM3 View Post
"Wheel torque" as expressed here is a number that does not exist in real life. The actual wheel torque should be multiplied by the gear and final drive ratios.

The torque numbers presented on dyno charts are simply calculated from the wheel horsepower and engine RPM to represent an "equivalent" flywheel torque number. The real flywheel torque number is actually higher as it does not see powertrain losses.

Either you show wheel torque multiplied by the gear ratio or flywheel torque without the drivetrain losses. Anything else is a fictive number.

Torque numbers as presented on most chassis dyno charts should only be used as a reference to get an idea of the shape of the torque curve.
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