boring my 318

toolmanmike said
I read the responses twice and everybody forgot Duster Boy's original question.

Dang, you read into the question somewhere.

DusterBoy15 said
when i build my motor i want to run pump gas and the max is 91 im in CA so go figure. So i want to know what the max i can bore the motor to increase the C.I and would using a 340 crank help thanks

I read overbore max. Unless the first sentence is about ratio. I didn't really see the go figure part as a seperate question on ratio.

toolmanmike said
You can also install thinner head gaskets for a slight increase.

Stock engines came with the thinest head gasket.

toolmanmike said
Boring the block doesn't actually raise compression and neither does a different crankshaft. Those two options just force you to install different pistons with the ratio you want.

This is what I was trying to say earlier.

Two, 318's, 1 with a stock bore and 1 @ .030 overbore, while both useing the same flat top pistons and same cc valve reliefs, the overbored engine will spec out with a ever so slight increase in the compresion ratio.