TVS2300 Rear Cog
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  • 1 Post By ArthurJGuy
2009-2014 Cadillac CTS-V Performance Mods Discussion, TVS2300 Rear Cog in Cadillac CTS-V Series Forum - 2009-2014; i have the latest rear 1:1 cog system from LPE installed on TVS2300,, it grips great making around 15psi of ...
  1. #1
    kj217's Avatar
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    TVS2300 Rear Cog

    i have the latest rear 1:1 cog system from LPE installed on TVS2300,, it grips great making around 15psi of boost but am sick of the constant noise it makes all the time,,

    is there any quieter alternatives?

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    Karch's Avatar
    Karch is offline Cadillac Owners Fanatic
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    Re: TVS2300 Rear Cog

    Talk with Joe at LeftCoast'32. Great guy, and a Magnuson dealer. He's done some work on custom parts, so he might have a solution.

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    kj217's Avatar
    kj217 is offline Cadillac Owners Member
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    any feedback on LPE 14 rib rear belt system?

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    Re: TVS2300 Rear Cog

    Take and drill small tiny holes in each of the upper and lower ribs every so often in a pattern, it will reduce the noise.

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    kj217's Avatar
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    Quote Originally Posted by wait4me View Post
    Take and drill small tiny holes in each of the upper and lower ribs every so often in a pattern, it will reduce the noise.
    not sure I got you,, you mean I drill holes into cog belt?
    any pics?

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    Re: TVS2300 Rear Cog

    No not into the cog belt. You do it into the pulleys.

    The noise is from the trapped air. When you drill tiny holes into the cog pulley it allows some air to get out. The smallest drill bit you can find. Tiny Tiny.


    Even loosening the belt some will make it a little quieter, but not by much. But when there are holes in the pulleys it gets quieter.

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    Quote Originally Posted by wait4me View Post
    No not into the cog belt. You do it into the pulleys.

    The noise is from the trapped air. When you drill tiny holes into the cog pulley it allows some air to get out. The smallest drill bit you can find. Tiny Tiny.

    Even loosening the belt some will make it a little quieter, but not by much. But when there are holes in the pulleys it gets quieter.
    2 to 3 holes in every upper and lower rib?

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    Moparman4444 is offline Cadillac Owners Fanatic
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    Re: TVS2300 Rear Cog

    Now that's the first time I heard (no pun intended) that drilling small holes in the pulleys will reduce the noise of a whining belt. heck I'll make my pulley look like Wisconsin Swiss cheese if it would quiet down the whine w/o reducing slippage. Very interesting. I'm wondering how much of a whine reduction there would be and how many holes in a 2.5" pulley or 9" lower pulley are recommended. Pictures would be helpful.

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    Re: TVS2300 Rear Cog

    Quote Originally Posted by Moparman4444 View Post
    Now that's the first time I heard (no pun intended) that drilling small holes in the pulleys will reduce the noise of a whining belt. heck I'll make my pulley look like Wisconsin Swiss cheese if it would quiet down the whine w/o reducing slippage. Very interesting. I'm wondering how much of a whine reduction there would be and how many holes in a 2.5" pulley or 9" lower pulley are recommended. Pictures would be helpful.
    we are not talking about the front regular rib pulleys,, we are talking about the cog toothed pulleys,,

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    ArthurJGuy is offline Cadillac Owners Member
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    Re: TVS2300 Rear Cog

    I used to sell silenced cog pulleys and I can tell you that if you just go and drill holes in it #1 it will eat up your belt quickly and #2 you will burn up the bearings at high RPM due to the pulley being out of balance.

    That is how I quiet them down, however it has to be done correctly.

    I tried the 14 rib rear and it wouldn't hold, so cog was the only option for me.
    PerformanceDefined likes this.

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    Re: TVS2300 Rear Cog

    I fail to see how the belt will not last as long. I have been doing that to pulleys for years and the belts have not shown more or less wear than with or without holes.

    As for balance, If you are taking the exact same amount of material off all the way around the pulley, how is it out of balance? Also we are talking about a small diameter pulley that is aluminum and doesn't weigh much of anything to begin with. If you take 3 holes out of every deep groove, all at the same spots and distance from center, you have nothing to worry about. I would be more worried about an unbalanced belt. lol...

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    any pic jesse?

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    ArthurJGuy is offline Cadillac Owners Member
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    Re: TVS2300 Rear Cog

    Quote Originally Posted by wait4me View Post
    I fail to see how the belt will not last as long. I have been doing that to pulleys for years and the belts have not shown more or less wear than with or without holes.

    As for balance, If you are taking the exact same amount of material off all the way around the pulley, how is it out of balance? Also we are talking about a small diameter pulley that is aluminum and doesn't weigh much of anything to begin with. If you take 3 holes out of every deep groove, all at the same spots and distance from center, you have nothing to worry about. I would be more worried about an unbalanced belt. lol...
    Without deburring the ragged edge will eat away at the belt. I have seen it happen dozens of times.

    If you think the average person can get this type of precision from the center axis on every single rib by hand, best of luck to them.


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    any of you guys sell them modified and ready to run?

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