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Belt flies off at high RPM? - What to fix?

This is a discussion on Belt flies off at high RPM? - What to fix? within the External Engine forums, part of the LSx Technical Help Section category; This is the 2nd time now, at WOT high RPM, the belt flies off. Once at the track, now today ...

  1. #1
    Member 666ws6's Avatar
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    Belt flies off at high RPM? - What to fix?

    This is the 2nd time now, at WOT high RPM, the belt flies off. Once at the track, now today on the highway. Leaves me stranded.

    I have an ASP crank pulley, and am wondering if that's the issue. Should I look at a different pulley?

    (A4, LS6 intake, tS 228r cam, plus lots more bolt ons.)

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    Senior Member 01ws6er's Avatar
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    could it be that you have the wrong belt size for the pulley??? Also check your tensioner and idler pulley, but just make sure you have the right size belt 1st.

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    King 0f n00bz shady milkman's Avatar
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    blacker than wesleysnipes
    98' trans am

    ls1 pulleys are known for that issue..get one with high walls ..i hate to say it..but slp has one uke:

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    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    Lat week, my belt almost walked completely off just cruising. Chances are, it is your tensioner pulley. The sides of it are not tall enough.

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    Katech has a really nice tensioner/pulley. Used same on the Lemans C-5R Corvettes.

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    Veteran 0rion's Avatar
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    if I'm not mistaken the powerbond pulley is the same one that SLP uses and it's the one I run.

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    They appear to be identical. Good parts!

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    Member 666ws6's Avatar
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    I saw the KATech tensioner, Looks like I may go for that.

    I'd be willing to re-invest in the SLP crank pulley too, but wonder if I should get the tensioner, and then if I slip the belt again, then go for the SLP crank pulley later. Thoughts?
    Last edited by 666ws6; 07-13-2008 at 01:13 PM. Reason: corrected thought

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    the pulley is available with the tensioner. Call them. My "kit" came with the pulley
    installed on the tensioner. Very nice parts, available in several colors too.

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    Member Sunset T/A's Avatar
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    Quote Originally Posted by 666ws6 View Post
    I saw the KATech tensioner, Looks like I may go for that.

    I'd be willing to re-invest in the SLP crank pulley too, but wonder if I should get the tensioner, and then if I slip the belt again, then go for the SLP crank pulley later. Thoughts?
    The Katech is a solid tensioner, NOT spring loaded. I have it. It works good.

  11. #11
    Member chieftransam's Avatar
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    +2 for the SLP pulley. I've got and it works great.

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    King 0f n00bz shady milkman's Avatar
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    blacker than wesleysnipes
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    make sure it is harmonic

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    Member 666ws6's Avatar
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    OK, I bought the Katech tensioner and another belt. Plus that Thunder Racing T-shirt with the TA wheel stand! I'm a sucker for TA stuff!

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    Member Sunset T/A's Avatar
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    Quote Originally Posted by sunsetta View Post
    The Katech is a solid tensioner, NOT spring loaded. I have it. It works good.
    Have the SLP pulley works GREAT, even though many bad-mouth SLP. I have had good luck with many of their products.

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    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    Any of our sponsors carry this upgraded piece?

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    Member 666ws6's Avatar
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    If you mean who carries the Katech Tensioner... yes, Thunder Racing carries it as well as some others. You can go to Katech's site and see who their distributors are as well.

    If you mean the SLP pulley... almost every sponsor has that.

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    Veteran Hi-Po's Avatar
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    I have the LQ4 6.0 motor.

    Will the Katech tensioner still work for my set up? Any body know???

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    King 0f n00bz shady milkman's Avatar
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    blacker than wesleysnipes
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    Quote Originally Posted by Hi-Po View Post
    I have the LQ4 6.0 motor.

    Will the Katech tensioner still work for my set up? Any body know???
    stfu ...yes i dont see why not.

  19. #19
    Veteran Hi-Po's Avatar
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    Well, I think I am about to buy the Katech tensioner. Solid.

    Anyone have any comments on not buying solid and going spring loaded? I am about to click the button!

  20. #20
    Veteran Hi-Po's Avatar
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    Ah, screw it... I ordered it. Victor is very close to me. Hopefully have it Saturday at the latest! My belt didnt come all the way off, it was hanging on by about 2 ribs. Ive read quite a few very good reviews on this tensioner. Hopefully all works well!

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