As you may have read in my other postim planning on turboing my zc and doing some head and block work. First off, would it be a good idea to bore out the cylinders? Im definitly getting new pistons and rods. Also, what woud be a safe number to bore them out to? Im doing all of the work myself because im in engines class at school next semester. Any info you can provide me would kick ***.

 

I think rule of thumb is no more te .5mm due to weakining of the wall and such without having to get new sleeves.

 

anyone else?

 

I agree with DrLantino, 0.020 maximum service overbore.