[GScivic7]

The only problem with turboing a b20 is the cylinder sleeves. They are a one piece design and are prone to getting hot spots which can warp and damage them. If you resleeved the B20 it would be the way to go. About the same hp as the b18, but more displacement + boost = a lot of torque.

As for being able to run 20 psi, new sleeves, forged pistons and rods. That will get you started.