i have a b18c5 swap in my civic. and i am about to take it out and build it. so i was wondering what is the highest i can go on the compression ratio and still run on pump gas? i was hoping for like 12:1 to 12.5:1. would that be possible?

 

wow thank you for all the replies they really helped

 

You just posted it yesterday. Chill. If you're that desperate for a quick response try honda-tech.