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underdrive pulley

This is a discussion on underdrive pulley within the External Engine forums, part of the LSx Technical Help Section category; are there any disadvantages to them? anything harmfull? and whats a good company that sells a good one with an ...

  1. #1
    Member tav8ws6's Avatar
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    underdrive pulley

    are there any disadvantages to them? anything harmfull? and whats a good company that sells a good one with an alternator pulley to keep it at a normal pace? is it worth the HP? thanks

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    Pathelogical Liar BlackLT1Z28's Avatar
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    The only thing I can think of is if you have a huge stereo pulling on the alternator. But you already addressed that by looking for a smaller alternator pulley. If you don't have a big stereo, then the stock alternator pulley should be fine.

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    Member Huskerz1's Avatar
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    Quote Originally Posted by tav8ws6 View Post
    are there any disadvantages to them? anything harmfull? and whats a good company that sells a good one with an alternator pulley to keep it at a normal pace? is it worth the HP? thanks
    Early versions were known to throw belts and some couldn't be used with double roller timing chains. Those issues have been corrected. Good brands are ASP, SLP, and Powerbond. TSP usually has the best deals on Powerbond. $199.00 with belts and crank bolt I believe. I got mine for 209.00 I don't think anbody will tell you that they noticed a gain in HP they could really feel. I bought mine because I am getting a new cam put in and the stocker pully has to come off anyway, so why not put a underdrive one one in it's place. I just wanting the faster revs myself. I seriously doubt I'll notice 6-8 HP on a near 400HP car.

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    Member tav8ws6's Avatar
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    so if it gives faster revs itll increase acceleration reduce 1/4 mile times pretty well wouldnt it? (obviously not a whole lot- maybe .1-.2 ?)

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    Member tav8ws6's Avatar
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    oh, and i have a stock monsoon radio. i wont be upgrading my stereo or anything like that, im not into that- i want more power not more sound

    anyway, so being that i have a stock stereo, i wont need the alternator pulley? or should i get the 2 pulley set incase it desides to take a dive? i have an automatic by the way

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    Nitrous Tuner LS2Tuner's Avatar
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    In Jersey you'll be ok. Out here in AZ in thbe heat we have issues sometimes in the summer running warm.
    Get the 2 piece and even though you don't have a stereo put the alt. pulley on.It will give you a nice voltage increase at idle.
    Don't be afraid of the bottle!!! Be afraid of your tune!!!

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    Member Empatho's Avatar
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    Quote Originally Posted by LS2Tuner View Post
    In Jersey you'll be ok. Out here in AZ in thbe heat we have issues sometimes in the summer running warm.
    Get the 2 piece and even though you don't have a stereo put the alt. pulley on.It will give you a nice voltage increase at idle.
    I agree get the alt. pulley you never know if you are going to need it in the future
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