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Discussing horsepower in the Modular Mustangs Forum. I have looked online for a way to calculate your power to see the difference ...

       

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Old April 22nd, 2007, 11:08 AM   #1
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horsepower


I have looked online for a way to calculate your power to see the difference from the rear wheels to the engine. I thought that it was 20% but I'm not sure. All of the ones online you had to have the 1/4 mile time and car weight. Does anyone know how to calculate this without that info, just the HP and FT-Lbs?
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Old April 22nd, 2007, 11:23 AM   #2
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the general rule of thumb is you lose 15% if you drive a stick and 20% if you drive an auto..

so if your car is stock

390 X .15 =58.5

then 390 -58.5= 331.5rwhp stock....

mind you this is inaccurate because your Cobra is underated in power.
same math applies to the TQ numbers.

i also looked online and didn't see the caculator man..
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Old April 22nd, 2007, 11:46 AM   #3
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Thanks alot, now I can find out what I am making with my new parts.
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