I've been exploring ways in which to optimize the amount of boost my supercharger is producing, but seem to be a bit limited for the time due to the 6-rib belt setup that the Procharger kit came with. At this time I won't be upgrading to an 8 rib setup, due mostly to the cost.
Therefore, I'd like to see how much boost folks who are running a D1SC are seeing, as well as your pulley combinations? ( supercharger/crank )
Currently with my 331, AFR185, custom cam, I'm seeing about 12psi @ 6200rpm, with the following setup:
* stock D1SC inlet and a distorted filter
*3.15" supercharger pulley
I ran this same setup on a 302 with smaller heads and cam, and lost about 1psi at the same rpm due to better flow of the motor.
With this pulley setup, I have very little to no belt slippage problems, but after speaking with one of the Procharger techs who is currently replacing the seals, he mentioned that the next step would be a 3.00" pulley, and that I may not see any more boost due to increased belt slippage.
So my thoughts are to purchase a filter which is less restrictive, per Mike Plummers post on horsepower tips: Your HP tips
I also have a 7.00" crank pulley that I will be installing to help spin the supercharger up quicker.
This pulley setup will spin the impeller to: 56,489rpm, with the D1SC having a max speed of 62,000rpm. ( crank pulley/blower pulley x step up ratio ) x max rpm