How far can you bore

I'm almost through with the 350 I want to use, not numbers matching. All I need is the oil pump and paint. The guy I bought my car from just sent me the numbers matching block after ten months. He blew the engine and installed another before I bought the car. I don't plan to do anything with it right now because, well because I can't afford to. He thought he was doing me a favor and boiled, baked and magna fluxed the block, fine. He also had it bored 60 over. I was told he had a ring brake and make a mess and to clean it up they had to go .060 over. Any problems taking a block out .060? Overheat etc. ? Sorry Adam I don't know what I did but it doubled. I wish I had the same problem with my stock.

|UPDATED|1/21/2003 2:44:07 PM|/UPDATED|

pozz33 said: Sorry Adam I don't know what I did but it doubled. I wish I had the same problem with my stock.

That ok...I just deleted the duplicate one.

pozz33,
.060 overbore is about the limit for a small block chevy engine. It's a good thing that he had the block magna fluxed. That ensures that there is no cracks in the block.
Just make sure that you have a good radiator, shroud, waterpump and cooling fan. This should prevent a potential overheating problem. You may have to experiment with the different thermostat ratings. IE: 180 deg, 160 degree.

Sarge

I agree with Sarge.
The guy did do you a favor by doing the work, even though you may not think so. It cost me $300.00 to have that work done to the block I bought. If he took it to a responsible machinist, I am sure it was bored as little as was necessary to clean it up CORRECTLY. If the bottom of the engine is not right, there is not much sense in doing anything to the top of it. Sounds like he gave you a real good starting point for a solid healthy engine.
Good luck with the build-up.

Depending on the casting you can some times safely go as far as .100 overbore. However I wouldn't go that far unless you are building a race engine. .060 is fine. It should not make a noticable differance in your engine cooling. If you are going to use it, I would suggest having a machine shop check the cylinder walls for equal thickness. If the shop that did the work did not check this, there is a possibility that the walls could be thinner on one side of each cylinder because of poor cast centering. A good way to tell if a block has been cast properly is to look at the cam bore from the front of the block. If the cam bore is centered in the boss, then it is a good even casting. If it is off to one side or the other, then it was not cast very well. A good machine shop can correct this by moving the bore to one side or the other.

Thank for all the info. Once I finish the engine thats going to move the vette I'll start on the numbers engine. I most likely will not install it.