Thread: More N55 info
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      07-12-2010, 04:08 PM   #37
bradleyland
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Quote:
Originally Posted by maxnix View Post
Yes, "dyno" runs that predict HP are just that, guesses. Most cannot determine what true crank torque is, much less wheel torque under real world running conditions.

Stationary with the hood up and the powered tires on rollers is not real world.
Are you kidding? You should read a physics book. A dynometer doesn't "predict" anything, it measures force. If you know the force that is exerted at any given RPM, you can calculate the horsepower being produced. If anything, a crank dyno reading is less relevant for real world application than a wheel dyno, because the crank dyno can't predict driveline losses. For comparing car to car, apples to apples, a wheel dyno is far more effective. Granted, you need to run both cars back to back on the same dyno for the purposes of direct comparison, but a dyno is a very effective tool for assessing the real output of your modifications.
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