underdrive pulley

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Jan 29, 2006 | 02:03 PM

BOTTLE ROCKET

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From: GA

underdrive pulley

I have to replace my balancer on my C5, and I was wondering if the 10% underdrive pulleys have really proven to be worth the extra cash.
I found a lot of concerns about throwing belts with them in the search area, but not a lot of hp #s
Does anyone have any #s

Jan 29, 2006 | 03:43 PM

bad6as

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every one says .1 off e/t 1 mph and 10hp

Jan 29, 2006 | 04:39 PM

gr8whte

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I have seen on 2 differant cars 1 tenth and 1 mph, I have never heard of belt throwing, it's worth getting.

Jan 29, 2006 | 04:54 PM

BOTTLE ROCKET

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From: GA

10hp for couple hundred bucks would be good. Guys pay $2000 for 25hp with heads
I had seen some new ones for sale on e-bay for $180 (although I wasn't able to find them today) Are these any good??

Jan 29, 2006 | 05:00 PM

Dave88z

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Seems like most of the belt issues are caused by high RPM and factory belt tensioners-not underdrive pulleys.

Jan 29, 2006 | 10:04 PM

dannyz

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From: olympia, wash

Quote:

Originally Posted by bad6as

every one says .1 off e/t 1 mph and 10hp

I think that's with the 25% underdrive pulley.
The 10% would probably be less then 5hp.

Jan 29, 2006 | 10:16 PM

TARZAN

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Jan 30, 2006 | 03:57 AM

BOTTLE ROCKET

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From: GA

Quote:

Originally Posted by dannyz

I think that's with the 25% underdrive pulley.
The 10% would probably be less then 5hp.

I thought that was what I had been seeing; The guys running the 25% have been claiming the 1 tenth, but I had not really seen any hp feedback on the guys running the 10% pulleys