[ZL1Atlanta]

We saw 29 psi on mine with a 416ci stock casting block (built bottom end). The block itself was the weak point and didn’t live long. The current setup is a 427ci and on the same pulley’s made 23 psi. The cam is also much more aggressive to help bleed off boost. In talking with Mike Sitar, the blower really shouldn’t be operated at higher than 25 psi or you’ll start seeing diminishing returns. Max efficiency is up to 20 psi.

On DA, we’ve only ran the car at the track on a pulley setup that made 20 psi on the dyno, but it made 18.5 psi in 3100 DA. I don’t recall what the DA was in the dyno room but obviously less. As a frame of reference, from 20-23 psi on the dyno it gained 100 RWHP.