13.5 vs 16.5 psi from our TDX57 journal bearing turbo. This is on e85 with a full 3 inch exhaust, large stock mount intercooler, and a medium streetport. Adaptronic FD pnp with ign1a smart coils. I did not put an agressive tune on it. Clutch slipped when I started turning up the boost controller for more response.