I was wondering where everyone spins their superchargers to. Do you spin to the Max Eff., Max Limit, Overspeed?

I am thinking about a change to a smaller supercharger pulley. I am in between the maximum efficiency and maximum limit right now.

Let me hear anything you got.

-Scott.

 

No input on the optimum rpm to run the blower, if you haven't bumped up to a larger crank pulley yet, I suggest to increase the crank pulley before going with a smaller blower pulley. The increased crank pulley change helps reduce belt slipage. I run the 7" crank pulley and stock 3.3" blower pulley and rev my engine to 6,200 rpm.

 

Thanks,

A blower pulley would be cheaper. Can you still get a 7" crank pulley other than a used one? Is a belt change typically nessesary when changing either a crank or blower pulley?

Also, is there a good place to buy pullies other than Vortech?

-Scott.

 

www.aspracing.com

I would change the crank, not the blower. Belt change, yes, usually.

 

I've got an old A-trim and I'm trying to get the most out of it. A swap to a 2.75" pulley would yield me 45,163 RPM, which is about 0.4% over the absolute RPM limit.

I think this might be the right way to go.

-Scott.

 

I supposedly have a A-trim too, and I bought a 2.95" pulley and I thought that would max mine out. where did you get the calculation from? maybe I did it wrong, or got the wrong info. also what boost are you looking to get?

 

BMoney:
I just made a quick excel sheet using the formula given at the Vortech site. I can email it to you if you like. I am also assuming I have the 6" crank pulley.

I am not really looking for a particular boost pressure.

How did that 2.95" pulley work?

-Scott.