|
|
Post by jeffries on Oct 8, 2007 12:14:00 GMT -5
This is possibly a question for Stephen Fields but anyone that could help me would be great.
I am wondering what is the most i can safely over bore a chevette cylinder? Also where is the best place to have overbore pistons made?
|
|
|
|
Post by Racer 33 on Oct 8, 2007 13:03:02 GMT -5
i kno theres a few ppl runnin .100 over motors but alot of ppl choose to run .060 over
|
|
|
|
Post by DOCTOR FIELDS on Oct 8, 2007 18:22:44 GMT -5
Alot of people have their own opinions on bore size. Some have gone up to .132" over and used Chevy Luv pistons. My personal opinion is no more than .080". Not all Chevette blocks are casted exactly perfect and you may get one that the core has shifted during the casting process. This will lead to cylinder walls being thinner on one side, which will determine how much you can bore it. Cylinder walls that are too thin will flex and become out of round. This can cause you to lose compression and cause more fricition.
Before boring any block, have it sonic tested. This process measures the thickness of each individual cylinder. You may want to have a couple sonic tested and pick the one with the thickest and most uniform cylinders.
Depending on how much you want to spend, you can get any type of piston made. I've had custom sets made through CP Pistons @ $551 a set including free floating wrist pins and a Total Seal ring set. Wiseco is around the same price. Most places charge about $100 - $110 per piston.
If you need more info send me a PM. I'd be glad to help you.
Stephen
|
|
|
|
Post by jeffries on Oct 8, 2007 20:00:21 GMT -5
Thanks Stephen if I come up with any more questions ill let you know. Your a big help thanks again.
Anthony
|
|
|
|
Post by rad15E on Oct 8, 2007 20:23:34 GMT -5
altho bore is a factor in engine performance its not the biggest factor,one of the fastest motors in tenn. is .040 over-other than bore you should really look at a good crank,rods and the most important part is the head,build each cylinder as if you building 4 seperate motors,porting intake and exhaust have to be the same to have a even flow to each cylinder , cam geometry is also a big factor-a lot of small things is what makes these motors run,it doesn't have to be a big motor to run will but it does have to be well built-that being said we have some big bore motors here in ky. that really scream, the clem motors are strong from what iv've seen,don't no the man but here good stuf
|
|
|
|
Post by DOCTOR FIELDS on Oct 8, 2007 21:20:35 GMT -5
Radford has some good points there as well. Not bad for an old fart.. lol  |
|
