You guys are incredible.

How many engines have you built?

I know what I'm doing, and as I said, your idea of high compression and mine on a street engine are two different things. This isn't a B18c, this is a 2.0L, large bore, PITA to tune if you start getting stupid. 10:1 is plenty to make over 200 HP, and any higher than that you start turning a rather torquey setup into a peaky one.

Besides, when talking about race engines [what I mainly deal with], the B18C5 could use a CR boost itself.

Everything is relative to what you have to work with and what you want to do.