pulley

Hey everyone,y idler pulley has gone out and looking to replace it. I have contacted whipple but they are out of stock. Can someone let me know what the smooth and Ribbed pulley part numbers are for this?

Anybody ever seen this before? I've now had three pulleys do the same thing. The supercharger pulley keeps shearing off from where the faceplate of it bolts on to the hub. I'm not ready to blame the pulley, I'm more concerned that maybe the supercharger shaft is locking up. Turning the shaft by...

Hello, I know this has been asked numerous times, however, I keep finding different information and nothing seems to be concrete enough. I currently have a Stage 2 Gen 5 3.0 Whipple 6-rib stock balancer 3.875" pulley for a 2017 Mustang GT which is my daily. My question is: What is the...

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Can any of you members tell me from your knowledge what a pulley at 3.75 or 3.5” would put out on my car for boost? Procharger told me on the phone my 9psi is produced with the 4.0” pulley. I’m looking to hit 12psi so 3.75” sounds close but I wanted to see if any guys on here with 350’s could...

Strapped the car down this week to try and get a full pull to get a log and boost amount on my setup. My boost gauge seems to be inaccurate on my dakota digital stuff. Also finally found my false knock issues coming from the metal hood tapping on the procharger head unit. Setup is a GenII...

When they talk about boost and size of pulley in superchargers this thing which I don’t understand. So the higher the psi the faster or slower? And in size if pulleys usually they higher the size of pulley the slower it is?