Quote Originally Posted by D1Camaro
Making boost with a large serpentine pully doesnt seem to be a problem. Its when you want to make more boost and order a smaller pully. That when the problems start. I evern tried adding idler pully under the blower pully to add more of a wrap around effect to the blower pully but it didnt seem to help.
mine was a 3.85" upper which is pretty common sized, not exactly large. When you get into the old P600B blowers, they took a very small pulley to make any boost. The F series do not require a small pulley, shouldn't be an issue. Just make a brace to stop the main bracket from flexing under throttle (which looses the belt tension), and use a good tensioner from Scott.

Jody