# Underdrive Pulley?

**URL:** <https://forums.speedlife.net/t/underdrive-pulley/86901>\
**Category:** SON240sx Automotive\
**Created:** [July 2, 2005, 10:12pm UTC](https://forums.speedlife.net/t/underdrive-pulley/86901 "2005-07-02T22:12:45Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![Twitchy](https://avatars.discourse-cdn.com/v4/letter/t/d9b06d/32.png) [@Twitchy](https://forums.speedlife.net/u/Twitchy)\
**Post date:** [July 2, 2005, 10:12pm UTC](https://forums.speedlife.net/t/underdrive-pulley/86901/1 "2005-07-02T22:12:45Z")

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Hey folks

I have removed my heavy clutch fan and was toying with the idea of an underdrive crank pulley…but for the price, can i do any better with something else?

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**Author:** ![Hector](https://avatars.discourse-cdn.com/v4/letter/h/43a26b/32.png) [@Hector](https://forums.speedlife.net/u/Hector)\
**Post date:** [July 2, 2005, 10:35pm UTC](https://forums.speedlife.net/t/underdrive-pulley/86901/2 "2005-07-02T22:35:29Z")

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underdrive pullys = bad vibrations

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**Author:** ![KoukiS14](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/koukis14/32/5522_2.png) [@KoukiS14](https://forums.speedlife.net/u/KoukiS14)\
**Post date:** [July 3, 2005, 5:10pm UTC](https://forums.speedlife.net/t/underdrive-pulley/86901/3 "2005-07-03T17:10:15Z")

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They also underdrive your alternator which lowers your voltage and if you are running electric fans makes it even worse…ask me how I know 🙂

Id personally skip it.

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**Author:** ![Twitchy](https://avatars.discourse-cdn.com/v4/letter/t/d9b06d/32.png) [@Twitchy](https://forums.speedlife.net/u/Twitchy)\
**Post date:** [July 3, 2005, 8:57pm UTC](https://forums.speedlife.net/t/underdrive-pulley/86901/4 "2005-07-03T20:57:26Z")

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what would put the $90 to better use

i have intake and full exhaust / header

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**Author:** ![Hector](https://avatars.discourse-cdn.com/v4/letter/h/43a26b/32.png) [@Hector](https://forums.speedlife.net/u/Hector)\
**Post date:** [July 3, 2005, 10:16pm UTC](https://forums.speedlife.net/t/underdrive-pulley/86901/5 "2005-07-03T22:16:41Z")

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> [@Twitchy](#):
>
> what would put the $90 to better use
> 
> i have intake and full exhaust / header

well if ur thinking of going with a underdrive pully id say go to the casino, play black jack, hopefully you win alot of money, buy a turbo, and if u dont win anything and lose all your money its still better than having to replace a blown motor due to the lack of a harmonic balancer on the motor

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**Author:** ![Twitchy](https://avatars.discourse-cdn.com/v4/letter/t/d9b06d/32.png) [@Twitchy](https://forums.speedlife.net/u/Twitchy)\
**Post date:** [July 4, 2005, 4:12am UTC](https://forums.speedlife.net/t/underdrive-pulley/86901/6 "2005-07-04T04:12:51Z")

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LOL there has to be something else…

i dont gamble

well wait i do…i have a 240

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**Author:** ![Theo23](https://avatars.discourse-cdn.com/v4/letter/t/43a26b/32.png) [@Theo23](https://forums.speedlife.net/u/Theo23)\
**Post date:** [July 4, 2005, 4:21pm UTC](https://forums.speedlife.net/t/underdrive-pulley/86901/7 "2005-07-04T16:21:58Z")

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-subframe spacers from Bing  
-High voltage coil  
-save more and get MSD

that is my “cheap” mod list.

Theo