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Calculating HP at the crank

Im just curious about whether there is any reason why this method isn't accurate. Let's say you do a baseline dyno and get 270 at the wheels. The crank hp

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Old 04-12-2012, 10:09 PM   #1 (permalink)
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Default Calculating HP at the crank

Im just curious about whether there is any reason why this method isn't accurate.


Let's say you do a baseline dyno and get 270 at the wheels. The crank hp that Nissan claims for the Z is 332. So that means the crankhp/whp ratio for your car is 332/270 = 1.23

Then after all your mods let's say you dyno at 310.

Would it then be accurate to assume your new crank hp is 310x1.23 = 381.3 ?
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