Bored too much??

Topic: Bored too much?? (Read 863 times) previous topic - next topic

Bored too much??

April 07, 2012, 08:56:07 PM

Just a curious question. How long do you all think a 302 bored .060 over would last?? I didn't have it done but I have a not-so-fresh short block that's never been installed. I didn't think a "Professional" shop would bore a production block that far.

Bored too much??

Reply #1 – April 07, 2012, 09:48:34 PM

You can have the block sonic checked for thickness. If it checks out and i am going to say very rare it can be punched out to .060. But ford only recommends .030. Hope this helps.

Bored too much??

Reply #2 – April 07, 2012, 10:01:50 PM

Thanks Tom. It's just I've never seen one bored that much. I always was under the impression that the max overbore was .040 because of the thin wall construction. If it did indeed pass a sonic testing, I don't think ANY form of power-adder would be wise with this one.

Bored too much??

Reply #3 – April 07, 2012, 10:14:32 PM

Choice of piston may be somewhat limited for .60 too. You'll be stuck w/the stock 3" stroke for anything off the shelf. A stroker requires a custom piston.

Bored too much??

Reply #4 – April 08, 2012, 09:29:12 AM

Ive seen them bored .060" before, for stock rebuilds. On a performance build it might have a overheating problem and the cylinder walls are a little thin for high rpms. The short deck height (8.2") causes a lot of side load on the cylinder wall, at high rpms the piston will try to push trough the wall. Ive seen a lot of cheap circle track guys break piston skirts on cast pistons because the side load from the short deck on the 302s.

Bored too much??

Reply #5 – April 08, 2012, 06:29:48 PM

I had thoughts of getting it from the guy, but the amount of over-bore has me concerned, although I don't have anything to put it in anyway.