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      07-05-2019, 08:53 PM   #40
hans007
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Drives: 2020 BMW M340i
Join Date: Aug 2012
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Quote:
Originally Posted by nullspace View Post
I know I'm being pedantic, but a 15% loss with 373.5 WHP would be 439 at the crank.

I suspect people are multiplying by 1.15, but that's incorrect. You have to divide by .85 since the 15% figure relates to the original crank value, not the WHP.
Quote:
Originally Posted by nullspace View Post
I know I'm being pedantic, but a 15% loss with 373.5 WHP would be 439 at the crank.

I suspect people are multiplying by 1.15, but that's incorrect. You have to divide by .85 since the 15% figure relates to the original crank value, not the WHP.
the 15% number is always bandied about as what it is , but probably inaccurate these days as transmissions are more efficient. they all have lock up clutches etc. I am not sure what the real number would but that rule of thumb 15% is probably not an accurate rule of thumb these days
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