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Discussing compression 9 to 1 VS. 11 to 1 in the 5.0 Mustangs Forum. My question is , if you have 3 high proformace engines all with the same parts ...

       

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Old May 4th, 2007, 12:16 AM   #1
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compression 9 to 1 VS. 11 to 1


My question is , if you have 3 high proformace engines all with the same parts and the only difference is the compression ratio, for example lets say the 9 to 1 compression engine has 225 hp, what would the horse power be at 10 to 1 and 11 to 1? is there a mathethmatical formula to this?
 
Old May 4th, 2007, 12:59 AM   #2
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It depends....


There is no formula that I know of. I've heard engine builders say 1 compression point is worth 20-25 horsepower but it really depends on the rest of the combination.
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