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Thread: O4 Cobra belt/ pulley questions

  1. #1
    Member USAWIT2's Avatar
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    O4 Cobra belt/ pulley questions

    What's the best belt for the supercharger? Got a gatorback on it now.

    Also it's probably time to change the inner accessory belt, looks to be alot of cracking.
    Best belt?
    Figure since I'm there I should replace the tensioner and idlers.
    Just stick with OEM ones?


    Thanks

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    Admin ZR's Avatar
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    Not seeing a clear win between any of the aftermarket belts.
    Yes for sure inner belt and idlers need attention. Beauty of the OEM Ford pulleys, bearings can be pressed out / replaced. While the aluminum aftermarket ones look fantastic, oddly some are causing never ending belt noise.

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    Quote Originally Posted by ZR View Post
    Not seeing a clear win between any of the aftermarket belts.
    Yes for sure inner belt and idlers need attention. Beauty of the OEM Ford pulleys, bearings can be pressed out / replaced. While the aluminum aftermarket ones look fantastic, oddly some are causing never ending belt noise.
    Thanks in my searches it seem to go back n forth between Gatorback and Gates HD belts.

    Still have to get that lower pulley off, can't wait heard its fun to do.
    Should I stick with Ford for the bearings or can you get the same quality at the local Carquest

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    Admin ZR's Avatar
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    Exactly that on belts.
    Lower cage is not considered rebuildable, yes some can be an absolute bastard to get off. Thats why you see so many running a Metco lower kit. You stock blower?
    Any quality bearing stands up find in the idlers / tensioners.





    Stock cage.


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    Quote Originally Posted by ZR View Post
    Exactly that on belts.
    Lower cage is not considered rebuildable, yes some can be an absolute bastard to get off. Thats why you see so many running a Metco lower kit. You stock blower?
    Any quality bearing stands up find in the idlers / tensioners.





    Stock cage.

    Stiegemeier Stage 4,
    2.76 upper, stock lower pulley.

    Haven't really had a good look at the lower pulley to check for wear, hoping it's fine.

  6. #6
    Admin ZR's Avatar
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    Don't let anyone talk you into driving the stock blower at crazy RPM.

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    Quote Originally Posted by ZR View Post
    Don't let anyone talk you into driving the stock blower at crazy RPM.
    No I good with where it's currently at.

    No luck with that lower pulley, just wouldn't budge. Guess the inner belt will have to wait.


    Hard to get a good pic, belt has some small cracking, thinking it's probably original

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    Admin ZR's Avatar
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    Do you have the correct stub tool and a mega breaker bar?
    Car in gear, park brake on, second person to hold brakes hard, jack or similar under your breaker bar, hands n everything else well outta the way.
    Lil easier to do on the hoist, all in place then lower car to push breaker bar. Odd one, will not come with the above and require action that could damage it.

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    Admin ZR's Avatar
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  10. #10
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    I had the car on blocks (under wheels) ebrake on, in 6 gear, 3ft breaker bar with a 14mm hex 1/2 drive socket. Using my 2 tonne jack to lift on the bar.
    Probably would be easier with a lift

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