Hello everyone, I have a question about over boring the cylinders, should I do it and if so by how much?? I have a ZC engine and I am planning on running a turbo after building the bottom end. I am looking at getting JE pistons and Eagle rods, right now the engine is apart and sitting in my front hall way I just have to take the block to the machine shop and than I can start to order parts..... So please give me your input.

Chris

 

personally i wouldnt do it but different people like different ----

 

I was thinking of boring it .20 over, but will that make the cylinder walls too thin?? If so, I will just get the machine shop to hone out the cylinders....

 

Exactly, have a professional do it..

On my built ZC, my engine is .20 over, and am using stock sleeves, Their is enough meat their.

Jeff

 

On my built ZC, my engine is .20 over, and am using stock sleeves, Their is enough meat their.

how much PSI?

 

It will be at 20psi when I am done.. still needs more work on the chasis.

Jeff

 

Sounds good to me, I'll get the machine shop to go .20 over, I was concerned with the cylinder walls not having enough meat to withstand 8-10 psi, since you are running 20 psi, I think I will be fine. Thanks for the reply.

 

But I do have support on my cylinder walls. its called pinning/posting.



You can get this done through. www.theoldone.com runs around 300 bucks.

I dont recommend a block guard either..
Jeff

 

Did you have the pinning done because you plan on running high boost or because you over bored your cylinders?? Will I be fine without pinning running 8-10psi?

 

mainly for high boost, you should be ok with 10psi

Jeff