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There is no honest way to determine the HP of an engine without knowing the specifics. The camshaft specs, the cylinder head specs (ported? Valve sizes? Valve springs? ) , the piston type (flat top, dome, dish, etc) etc. They can range from 150 HP to as much as 400, though the 400 would take an incredible amount of money. I know this is an old question, but the SA answer that was previously here was insulting.

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โˆ™ 2015-03-15 03:11:43
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Q: What is the specific horsepower of a 1963 283 bored 060 over?
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Horsepower is simply a measure of the rate at which work is done. Any physical work done over a specific period of time will yield a calculation of the work performed, and that's called horsepower.

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Sounds like a 343 to me. But for parts its a 283 bored 60 over

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That would be called a Chevy 307 bored .40 over.

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How many cubic inches is my 340 bored .30 0ver ?

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Each cylinder has been re-bored to a diameter .030" larger than it came from the factory. .030 oversize isn't much. It's done to correct slight cylinder tapering and to put the engine back into condition that it will last. It really isn't enough size difference to produce noticably more horsepower. Note that when the cylinder is bored .030 over, you'll also need pistons and rings that are manufactured to that size.

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No a 383 is a 350 with a 400 crank. A 350 bored 60 over is 361 cubes.

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Produce more HP depending on much much they were bored. The engine can generally be bored up to .060 over in most cases.

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