A former member here "BLOWN" had a powerdyne supercharger on his Bronco.
Unfortunately he left FSB and deleted every single one of his posts.
The guy just couldn't take constructive criticism.
Funny thing about that ..we did not see that in practice. Before about 4500 RPM or therabouts, the boost gage never passed the 'zero' mark. I'm sure we could have gotten more with teh smaller diameter 11 psi pulley..but from post on the Mustang forum and other places, we had already been warned the the 11 psi pully was prone to belt slippage, during fast throttle-up and at high RPMs, and wore the belt out quickly as a result.Powerdyne claims to add boost earlier, at lower RPM than other centrifical blowers, .