Thread: 283 punched out pass .060?

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I got a 283 chevy engine from a 1958 corvette with dual 4 barrels that when I took it apart found out that the cylinders have already been punched out .060 over. They just need another .020 to clean them up. Is there enought cylinder thickness to go another .020 over with out hurting the block? I engine didn't cost me anything but would like to save it if I can.

all is well the expert is here yes you can, althought most will say no. you can go .155 ive seen pistons for them althought im not that brave, i stop at .125. just make sure you have found a set of pistons 1st as sometimes they can be a pain to find.

Sonic check to be certain. After spending hours cleaning and painting my 283 I took it to Fowlers machine shop here in town to have it sonic tested and the crook that came out to take it out of the back of the van demanded they clean it first(extra charges) and I told him I had a little more sense than to fall for his rude ways to manufacture work for them and to forget it! I stuck with a .060" over,,,at another shop of course. They should have had to pay for my gas to get there. Crooks,,,,I know when a motor is clean as well as a grown-up! I'm only 53

Sonic test the block before you spend any money on any pieces like pistons or anything.... doesn't take a lot of core shift to make the overbore beyone .060 a problem. If the walls are too thin, overheating usually becomes a problem on street cars.... Not every block will go to .125 and be good for street use...

Originally Posted by Dave Severson

Sonic test the block before you spend any money on any pieces like pistons or anything.... doesn't take a lot of core shift to make the overbore beyone .060 a problem. If the walls are too thin, overheating usually becomes a problem on street cars.... Not every block will go to .125 and be good for street use...

Thats what the 30 year machine shop owners are saying around here.Some won't even do the job without payment up front. But they do say that some blocks will do the .125 but sonic test first or take a 90% chance of loseing your money and motor.

Sonic checking is just like insurance, you don't have to have it but........

I check all mine. With quality control being what it is these days, I've seen some core shift that would make a standard bore scary!!!!!!

We usta check 'em with a set of indicating calipers down through a water passage in the deck surface. I've seen 283's over 1/8" that worked perfect, and some that wouldn't take .060. I put .040 over sleeves in one, and it was great.

I have sleeve all the cyl back to .030 over bore on a 55 chevy brfore and no problem.

guy here just picked up his .100 over 454

Originally Posted by gassersrule_196

guy here just picked up his .100 over 454

so ? they at that size there junk you can go .125 but not all of them will go out .100 or should i say not go out that size .boring out any block this far you are asking for it less you fill the block

well enough people do it that the pistons are readily availbe, they were forged domes so i take it alot of people must do it if the parts are there. not many people do what i do therefore my pistons are hard to find but they are out there. 454's have monstorous cyl. walls!

well we did 100 and 125 over 454 you are not telling me any thing about 454 and boring then out. i was running them down to diamond to get them sonic check and a bore over 21 years ago if you take one out all the way to 100 or 125 you are never going to bore it out any more and you may find the walls moving all over there is easer ways like just a 4.250 crank if you want more CID

You should be ok at a 4 inch bore on an early block. The later 283s were thiner in the cyl walls. Just to be safe I would have the block checked for thickness.

Bob
http://members.kos.net/willisb/

"Back in the day" it was common to punch a 283 out .060 for 292 cubic inches, and you could go .125 for a 301, but that would be the safe limit.

I would have the block checked before you made the decision.