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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; just curious about the gain from going with the 25% underdrive pulley i see available?...

  1. #1
    Junior Member
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    blk
    99t/a

    underdrive pulley

    just curious about the gain from going with the 25% underdrive pulley i see available?

  2. #2
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    2000 Trans Am

    Less than 10 rwhp and some better gas mileage most likely.

  3. #3
    NY Representative basballny2's Avatar
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    Red
    2001 ws6

    not sure but i can say its a good mod. i have LTs, CAI, exhaust and UD pulley and put down 370 rwtq and 365 rwhp with an m6......usually CAI lts and exhaust get you around 345-355 so im going to venture and say 10rwhp is a good estimate.....also easy to do yourself if you have the right tools, should only take about an hour nd a half

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    Auto Painter RyanJM's Avatar
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    White
    1998 Trans Am

    I have the asp set with the alt pulley since I have a A4 gives you about 10 HP and took my friend about 30 min to install. G
    1998 Trans Am 85k miles.
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  5. #5
    NY Representative Vertiviper's Avatar
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    99 Trans Am, M6

    Quote Originally Posted by basballny2 View Post
    not sure but i can say its a good mod. i have LTs, CAI, exhaust and UD pulley and put down 370 rwtq and 365 rwhp with an m6......usually CAI lts and exhaust get you around 345-355 so im going to venture and say 10rwhp is a good estimate.....also easy to do yourself if you have the right tools, should only take about an hour nd a half
    you got that right.

  6. #6
    Impounded
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    VW BEETLE W/ FLOWER
    88 CRX

    U/D pully should only take about 30 minutes lol (with a puller.)

    normally the U/D pulleys are good for 10 HP on the dyno if that is the kinda thign your lookin for!

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