The Ford Barn - View Single Post - Rebuilding An 8Ba

tubman · 04-14-2016, 04:09 AM

As far as a bore goes, I've done 3 8BA's and bored them all to 3 5/16" (1/8" over) with no problems. I figured since I had to buy a set of pistons anyway, why not go for a decent increase in displacement. (an 1/8" overbore increases the displacement by about 6%). Unless there are other problems (severe rust pitting or core shift which I have never seen), there should be room for a couple of more overbores, should they be needed. Realistically, in the entire scheme of things, most builds from this time period will probably be the last any of these engines see. For an engine that is not going to be raced, I wouldn't hesitate to go to 3 3/8" if I got as good a deal as I got on my last set of 3 5/16" pistons.

04-14-2016, 04:09 AM	#4
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 10,319	Re: Rebuilding An 8Ba - Tips & Suggestions? As far as a bore goes, I've done 3 8BA's and bored them all to 3 5/16" (1/8" over) with no problems. I figured since I had to buy a set of pistons anyway, why not go for a decent increase in displacement. (an 1/8" overbore increases the displacement by about 6%). Unless there are other problems (severe rust pitting or core shift which I have never seen), there should be room for a couple of more overbores, should they be needed. Realistically, in the entire scheme of things, most builds from this time period will probably be the last any of these engines see. For an engine that is not going to be raced, I wouldn't hesitate to go to 3 3/8" if I got as good a deal as I got on my last set of 3 5/16" pistons.