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underdrive pully

This is a discussion on underdrive pully within the External Engine forums, part of the LSx Technical Help Section category; anyone have a preferance on which underdrive pully to get?...

  1. #1
    NY Representative basballny2's Avatar
    Join Date
    Aug 2007
    NeW YoRk

    2001 ws6

    underdrive pully

    anyone have a preferance on which underdrive pully to get?

  2. #2
    Moderator 35th-ANV-SS's Avatar
    Join Date
    Oct 2008
    Wherever life takes me

    02 35th LE Camaro SS

    This is a quote from Hi-po's sticky...not sure if it helps you or not.

    Under Drive Pulley's -
    ATI -
    SLP - $179.00
    ASP - $214.00 - Crank
    ASP - $24.00 - Alternator
    PowerBond - $200.00
    BBK - $229.00

    SLP, Powerbond, and ATI are all good underdrive pulleys with higher walls to aid in belt alignment. They will all show the same average horsepower gains. They don't so much add any HP, rather they reduce HP loss by spinning the accessories slower. Generally people don't have charging issues. If your having problems throwing belts, the Katech solid belt tensioner is great. My belt began to 'walk' off and after installing the Katech tensioner, I never had a problem again. Its a great piece that looks sharp.

    Katech Solid Belt Tensioner - $135.00

    Consider reading this webpage. Its very basic, but is a good way to remind you of the smaller things.

  3. #3
    Junior Member
    Join Date
    Oct 2007
    Cushing, OK

    2000 Z28 M6 HT

    My vote goes towards SLP or Powerbond. I have a Powerbond
    25% UDP that I plan to install in the next couple of months.
    The reason I picked it is because of the high belt retainer walls.
    I've heard that ATI makes a quality product, but I have no experience.

    ASP is a little lighter, but it's belt retaining wall aren't as high.

    You should be fine with whatever brand you chose. Just stay
    away from March. There UDP has an odd bolt pattern & you
    can't use a normal tool to remove it.

  4. #4
    formally 01 T/A 0verkill's Avatar
    Join Date
    Jul 2007
    San Diego ca

    "Arrest Me Red"
    2001 trans am

    i think the slp is made by powerbond but im not for sure on that. i have the slp on my car and have no issues with it. it looks cool to

  5. #5
    Member joedude02's Avatar
    Join Date
    Mar 2008
    Goose Creek, SC

    Victory Red
    2002 T/A WS6 A4

    pm sent

  6. #6
    Awaiting Activation
    Join Date
    Oct 2007

    1998 T.A.

    ATI is hands down the best pulley out there but is in the $400 range. There is a reason it is on virtually all pure track cars I have ever seen. It has the ability to dampen the widest frequency range of torsional crankshaft vibration. It is also the lightest available and is rebuildable.

    In the last year or so they came out with a 25% UD. Before that 10% was the only UD offered

  7. #7
    Member cuzimoto's Avatar
    Join Date
    Feb 2008
    Newport Beach

    99 Formula

    I've had ASP for 7 years, tons of track slips never a problem. 5 stars from me.

  8. #8
    Member Blue28's Avatar
    Join Date
    Nov 2007

    Navy Blue
    1999 Camaro Z28

    You forgot Fluidampr, I would rate it high on that list.

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