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  1. #1
    Le Mans 2010 Sponsor pe2unia's Avatar
    Join Date
    Dec 2006
    Maryland, Boynton Beach Fl, Bethany Beach Delaware

    Default "Whipple" Ultra grip pulley's (no more belt chirp)

    We now have our patented Ultra Grip Pulley’s available to offer to our forum members for the Whipple super chargers or the stock OEM Eaton super chargers. For those of you that have a Whipple on their cars and have belt chirping as well as belt wear we now have the answer that you have been looking for. These Ultra grip pulley's have been around for a long time now with most of the customers coming from the Ford Mustang family (For years Lethal Performance has sold hundreds of these pulleys that were installed on Mustangs with rave reviews). Attached you will see a dyno test with a OEM pulley and the Ultra Grip of the same diameter on a super charged Ford Mustang and notice with the OEM style the humps and peaks due to belt slippage then the after with the Ultra Grip a very smooth more linear dyno graph. My machinist has engraved (“FORD GT”) around the face of the pulley as an added feature for our forum community. Shadowman has just installed the prototype on Ed Simms car and they are both very happy with the results from the pulley. These pulley's will come in raw billet form and made from Virgin 6061 T65 Aluminum and will be sold in a variety of sizes (3.25 & 3.50 for the 3.4 liter) and (3.75 & 4.0 for the 4.0 liter). If anyone would like a specific size not listed please contact me.

    The Ultra Grip pulley was designed to reduce belt slippage in 4 manners.

    It has a tighter tolerance "V" groove to better grab the belt
    It has a flatter tooth as to not go beyond the gripping area and giving the belt a lager surface area to grab
    It has a slot that creates a vacuum that keeps the belt from hydroplaning
    It has a positive edge to grip the belt better
    I has a opposite edge to keep from tearing a belt

    For those of you that are interested the pulley will cost $240 plus $15 shipping and handling.

    Here is the feedback from Shadowman on Ed Simms car.

    Whipple list:
    1. Shadowman 3.625 PD/Shipped
    2. Shadowman 2-3.500 PD/shipped
    3. 2112 3.500 PD/shipped
    4. jaxgt PD/shipped
    5. CJ428 3.25 PD/shipped
    6. GTFUN 3.500 PD/shipped
    7. HeritageBruce 3.500 PD/shipped
    8. Lorenzo 3.500 PD/shipped

    Eaton list:
    1. Kingman OEM stock PD/Shipped
    2. DanQ
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    Last edited by pe2unia; 10-25-2011 at 11:00 AM.
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  2. #2
    Blue/white 06' 2112's Avatar
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    Feb 2010
    People's Republic of Washington State


    I am in.

  3. #3


    Wow. That looks great!
    2006 Ford GT - Black Mark II #1393 - SOLD
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  4. #4
    GT Owner
    Join Date
    Jul 2006


    Want one
    Gen 2 Whipple, 3.5 inch pulley !
    Last edited by jaxgt; 09-02-2011 at 08:28 AM.
    2005 Black Stripe delete Ford GT with lots of goodies
    Some old slow stuff and some newer fast stuff
    Rally III, IV, V, VI, VII, VIII, IX, X, XI, XII ...
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  5. #5


    Darm ... my hands......

    Yes the pulley is wonderful on many levels

    Takes care

    Last edited by Shadowman; 08-30-2011 at 04:14 PM.
    "RIP my friend Daniel Bonyhadi aka Bony"

  6. #6
    Totally ****** Up Fubar's Avatar
    Join Date
    Aug 2006
    Dallas, TX


    Looks nice... can you guys explain this:

    It has a positive edge to grip the belt better
    I has a opposite edge to keep from tearing a belt
    I'm sure it makes sense to the engineers but I'm just a rocket scientist.
    I'm Just Say'n!!!

  7. #7


    Quote Originally Posted by Fubar View Post
    Looks nice... can you guys explain this:

    I'm sure it makes sense to the engineers but I'm just a rocket scientist.
    It is not an increased grip as in tearing action but rather it is the lack of air pressure between the belt and the pulley that insures a constant and consistent grip; the slots that you see insure that no pressure can build up.

    They work and very well

    Takes care

    "RIP my friend Daniel Bonyhadi aka Bony"

  8. #8
    GT Owner Kingman's Avatar
    Join Date
    Aug 2006
    Surf City, USA


    I'm in for an OEM version please.
    Faster faster faster, until the thrill of speed overcomes the fear of death.
    Hunter S Thompson

  9. #9
    Farm GT CJ428's Avatar
    Join Date
    May 2008


    I'll need one of those.

  10. #10
    GT Owner DanQ's Avatar
    Join Date
    Aug 2005
    Lake Zurich, IL


    I'm interested in a mild one for the stock eaton charger.
    Quote Originally Posted by zrchris View Post
    Brand dia PSI
    1. stock = 3.307 = 12.50
    2. Roush = 3.150 = 13.13
    3. Metco = 3.000 = 13.78
    4. FRPP = 2.884 = 14.33
    5. Whipple = 2.870 = 14.40
    6. Metco = 2.800 = 14.76
    7. Hefner = 2.750 = 15.03
    8. Whipple = 2.700 = 15.31
    From that thread I think that means I'm looking for a 2.884" or 2.870". Want to stay with stock belt. Do you have that size?

    PM is Ok
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