Inliners International Forums General Discussion Engines engine boring

How far can you bore a 250 six. Can i go 60 over?. My engine was bored 40 over at one time.

I believe you can bore out to 60 over. But I don't have the book in front of me to actually confirm this.

Yes you can go .060 over Some have gone as much as .125 But that does nake for some Very thin cyl. walls. But with .060 You are still safe Hope this helps }[oooooo]

i wouldnt try for high compression though after that...are u looking for pistons as well?

Thanks everyone, thats all i wanted to know. Your always a big help on this forum.

thetrueslayer

What many have done is to sleeve the block so that they still have a pretty thick wall and also fill the block with one brand or another of block filler to stiffen the blocks But these are not daily drivers some only have very little water to None at all.And the ones that I know about are also running Elky not reg. race fuels. hope this helps.}[oooooo]

I have decided to have it sleeved, and then rebored to get back to the 40 over piston.Like i said this engine only had 30,000 miles on it, and this way i just have to do the one cylinder.