Hi all,
just after some advice on a turbo engine I am building. I have the choice between 4 heads, two giving a CR of around 7.5:1, the other two 8.0:1 and 8.3:1.

This is for a daily driver so the 7.5s are out, but I'm not sure which other head to use. My options are
EDIT: should be asleep, I meant to say

L16 open chambered, 38.5cc giving a cr of 8.3:1
L20b closed chambered, 41cc giving a cr of 8.0:1

I know the open chambered heads are supposed to flow better and resist detonation, but 8.0:1 sounds better from a more boost perspective (hoping for ~11/12 psi max). I want the car to be fun whilst still driveable.

Any advice/info would be appreciated.
Oh, and do we have any megasquirt masters on 1200.com?