pulley size

  1. C

    2.3 Whipple Pulley Size Help

    So I've come to find that I will be upgrading to a Gen 2 2.3 Whipple. My question is what size upper pulley should I get? I wanted to shoot for 600WHP, but a friend told me that with the setup I have, I can expect to safely max out at 580WHP. The mods to my car (engine/tuning related) are: JLT...
    • carguy96
    • Thread
    • horespower pulley pulley size tuning upgrade whipple whipple 2.3
    • Replies: 17
    • Forum: Tuning À la carte
  2. S

    How much Boost Lost due to Altitude?

    I posted this in the "Taste of Home" forum as well, but maybe this is a better choice. I have recently installed a Procharger on my 17' GT with a P-1x headunit, and a 3.5" Pulley. I live in Colorado and was wondering how much boost loss others at this altitude are seeing? I was under the...

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