The great debate! !4mm vs 8mm vs 11mm

Discussion in 'PSI Superchargers Tech Questions' started by Ted Elrod, Mar 19, 2023.

  1. Ted Elrod

    Ted Elrod New Member

    Joined:
    Feb 24, 2013
    Messages:
    23
    Likes Received:
    0
    I have talked to several people about which belt to run on a alcohol Aj 526 with a K11 blower. Turning about 9000 rpm. Like to hear from the guys who run this combo. I have been told the 11mm will jump teeth. I always ran 14mm but am putting a new combo together, Have no belts or pulleys yet so open the any combination. Any roots blower guys left? What is everyone tried or are running.
     
    #1
  2. kosky racing

    kosky racing Comp Eliminator

    Joined:
    May 11, 2003
    Messages:
    890
    Likes Received:
    48
    8mm
     
    #2
  3. td3829mk

    td3829mk Member

    Joined:
    Dec 31, 2015
    Messages:
    180
    Likes Received:
    19
    I switched from 14mm to 8mm a few years ago and haven’t looked back. Does a lot less damage when it breaks.
     
    #3
  4. jay70cuda

    jay70cuda Well-Known Member

    Joined:
    Sep 30, 2009
    Messages:
    1,139
    Likes Received:
    35
    I've ran 14 my whole life at 20% with your combo. Shifted anywhere between 9200-10400. Never broke or had issue. Put a whole season on 1 belt then rotate it to a spare. Carbon gt belts. With lower OD 8mm is the only way to go for nhra. It's the only pulley that makes the correct OD
     
    #4
  5. Ted Elrod

    Ted Elrod New Member

    Joined:
    Feb 24, 2013
    Messages:
    23
    Likes Received:
    0
    I run 34% OD
     
    #5

Share This Page