In Jan-Feb Im going to be rebuilding my b18b, I need to know, How far can i bore it out to, while maintaining a boostable (Is that a word) engine.

Im going with 8.8:1 or factory compression. I want if i don't have to re-sleeve 300hp.

If i have to resleeve im going with 400+hp.

 

there is no guaranteed size that some one can give you it seems to very from motor to motor

 

But is it possible to bore it over and it still be boostable.