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There are many variables incuding camshaft selection, headers, is it carbureted or fuel injected? Turbo (s)? Nitrous? Etc., etc. Normally a good rule of thumb for a mild rebuild with 4 barrel and headers is approximately .75 to 1.25 horsepower per cubic inch.

Example:

302ci @ .030 over is 306ci.

306ci x .75hp = 229.5hp

306ci x 1.25hp=383hp

With an average 306hp It will move out pretty quick in a light car like a Mustang.

These are just averages and could range greatly one way or the other depending on how radical or mild you decide to build it. With a single turbo and some good tuning 475-500hp isn't out of the question. At that point you will want to seriously consider strengthening the bottom end with a forged crank. I could ramble but it will get edited out anyway Good Luck with the build!

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12y ago
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Anonymous

Lvl 1
3y ago
slight cam, 4 barrel carb,gas

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Q: How many horses does a 302 engine bored 030 over have?
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