Which is why I chose not to overbore mine. I wanted the HG to have as much sealing surface as possible.

 

+100

 

the way i look at it, if you overbore to start with, you cant go larger when you have problems. if stock is 87, you can **** up the sleeve and bore to 88 or 90 and still use them case in point, i sleeved my h22 block with stock size 87, and it blew. when i sold it the dude bored to 88 and just bought new pistons. if you are already at the end of the spectrum your resleeving if anything goes wrong.

and +1 for what price is he charging? after i found out what laskey charges for full built motors assembled, it better be a great deal to buy someone elses project.

 

I agree, I went from 89mm to 90mm.

 

 

In my experience, in the overbore sleeved F20's the space between cylinders gets thinner and thinner. It doesnt leave much sealing surface there, and that is where the headgasket will usually fail.

The only thing I think might resolve the problem would be to Oring the block.

But these failures occured in high boost applications, a 400-450hp application might not have as much trouble.

If you have any other questions, feel free to PM me

 

I should not have a problem. Installation as well as the machined surface must be perfect.

 

I was aiming for 600+ hp
Has anyone used a 89mm bore without problems?
Thanks
fadi

 

U WILL NEED A 3MM COPPER HEAD GASKET FOR SURE!!!!!!!!!!
i went threw 3 cometics gaskets on my 89 bore sleeves.....

 

Elite, what head stud did you use and how did you torque them?