https://honda-tech.com/zerothread?id=158474

I have a question for you guys. I have a 96 prelude vtec and I am installing a turbo and I was searching this website and trying to see how much I should bore out my block. I already sent my head out to portflow and having them do their headwork and oversizing my valves .5 mm. As well as the whole ferrea valve train. Anyways I saw one post where someone said that vince from golden eagle said to bore it out .2 mm over for turbo cars, but later on someone posted 2 mm over. Does anyone know which ones right? I been dealing with vince also at golden eagle, and he told me that he suggest the stock bore. Before I ship it out to him I wanna exactly how much to tell him. Thanks guys.

 

Stock bore on your h22 is good enough!

 

I agree.