Evidently the published formulae for supercharger boost are summarized with "assemble and instrument the unit, then test and change pulleys as necessary" ???
While I don't feel that that a change from Radial TA's to BFG drag radials is necessary at this time, I was impressed with the power increase.
The MP90 is flowing about 260 cfm at 6760 rpm and is now starving above 3000 engine rpm due to my expert surgical mod's to the junk Edelbrock 500. This seems to be quite evident as the boost drops off above 3000 rpm. We need a Holley 0-8007 390 cfm with vacuum secondaries.
Now with 1000 miles on the installation, a few clutch bugs have shown up and the Saginaw transmission ratios are no fun to drive. With the 3.11 low and 4.10 rear axle gearing, I need to shift before crossing an intersection and can start in 2nd gear with better results. I am going to change to the single ring Saginaw gear set with the 2.54 low gear. I will rip it all apart in a couple weeks and take care if all of this at one time.