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Underdrive Pulley + or - ????

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Old Sep 4, 2007 | 04:29 PM
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Eddie 70's Avatar
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Default Underdrive Pulley + or - ????

I am considering an underdrive pulley for my LS swap. Any plus or minus experience you have with them please chime in. I am not going to be running any stereo equipment or power accessories. As a matter of fact the LS will be the only draw as far as electrical goes.

What kind of life should be expected from this as compared to the stocker?


Thanks for any help you can offer.
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Old Sep 5, 2007 | 10:54 PM
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i dont have a ud pulley, but from what ive been reading. most ppl gain about 10 hp. most ppl dont have any problems with them. even the ppl with big stereos and power accessories dont have problems.
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Old Sep 5, 2007 | 11:09 PM
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Yahelou, thank for the reply. Is there any preferred brand or type to be looking at for this. I have been looking at the ASP brand because of price alone. I will be running a G5X2 cam with this if that makes any difference at all.
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Old Sep 6, 2007 | 07:32 AM
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no problems with mine.

charge is fine but i don't have a system.

i have the ASP, and have only thrown a belt once...
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Old Sep 6, 2007 | 09:51 AM
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Originally Posted by teke184
no problems with mine.

charge is fine but i don't have a system.

i have the ASP, and have only thrown a belt once...

Never thought about throwing the belt. Is the ASP prone to this? What RPM were you running to throw the belt?
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Old Sep 6, 2007 | 10:20 AM
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I have the ASP is the reason I was wondering but have not installed it yet.
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Old Sep 6, 2007 | 10:36 AM
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ASP has had a belt throwing issue from what i have read but the fix for that is a Katech belt tensioner.It has the high lip on the pulley. I have the ASP Underdrive pulley and Katech tensioner on my car right now and have not had a single problem
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Old Sep 6, 2007 | 10:42 AM
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I've been running the asp for 3 years now with no problems at all. Never thrown a belt.
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