I need help, I dunno how to figure out what Compression Ratio I want for my B20 right now. I'm gonna be running a straight B20 turbo but I might swap a vtec head later on. So I want 9.5:1-9.6:1 with a vtec head, what would the CR be with a LS head?

 

Ls head and b20 haed are exactly the same. Compression would be 8.8 or 9.6 depending on your year of b20(B or Z)

 

If you want a B20 w/ B16 head to give you 9.6:1...
then a B20 with a stock head and the same pistons would give you about 9.2:1