horsepower question

Ive got the f-head engine in my jeep, its bored .80 over. Each .10 the f-head gets bored over, how much horsepower does it to the crank and the rear tire? Thanks in advance!
-Em.

 

It would be pretty minimal, nothing you'd feel by "seat of the pants". Consider head, valves, intake, exhaust, cam, etc, etc, is all the same.

The small amount of displacement increase doesn't amount to much, even on a dyno to see the results.

 

I poked a couple out .080 and there was a very notable increase in power- 99.99999% of which I attributed to actual functioning rings

Greatest bang for buck will still be a high compression head. You might get a hp or two out of .020 or .040 overbore, but it will not likely be something you will actually notice.

 

Calculate what the displacement increase is and the power increase will be close to that amount. Might be a little more than that, because the compression goes up slightly too.

<edit> The bore of the 134 is so small, that 80 over (remarkably) increases the displacement by about 5%. If I knew the combustion chanber volume, I could figure the increase in compression too.

I expect the larger bore and the increased compression ratio will make a noticeable difference in this case.