Originally Posted by m3an
I had to comment this, but that's def off; no one I have seen w/ a built motor is running over 15-20psi and on a built LC motor that will make a very big increase.
I would def do a 9-10:1 over a built 12:1 all day long. Nicer to be able to run higher boost
A built engine record is around 650 whp right?