4.9 engine rebuild and bored over

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11-29-2010, 12:33 PM

Dan92

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4.9 engine rebuild and bored over

is there any way to know how much extra HP i got from boring out my engine .30 over? without having to dyno it?

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11-29-2010, 02:35 PM

DBGrif91

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There is a math equation you can use but I don't know what it is. Maybe try google or yahoo?

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11-29-2010, 06:01 PM

88F-150pimp

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* * Automotive Programs by Bowling & Grippo * *

There is a calculator for rough hp calculation and a roadway vehicle dyno calculator. The latter is more accurate, the former is quicker - I got +2 horsepower, but that's assuming nothing else has changed with a bore increase of .030, or 5 ci.

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