Thinking of doing a LS/Vtec engine for my new boosted engine. I wanted to use the stock bottom end (b18b) with a b16a head. What will my compression ratio be with this combo? Can this combo take 9lbs daily driven not being revved past 7800?

Thanks, Jeff

 

Don't quote me on this, but I think it'll be around 9.5 to 1 on stock pistons, with Si head.

Should take 9psi with no problems. Use a blockguard. Back off timing to 13 degrees BTDC too, and run 1 step colder plugs.