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Old 01-29-2006, 02:03 PM
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Default 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
Old 01-29-2006, 03:43 PM
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every one says .1 off e/t 1 mph and 10hp
Old 01-29-2006, 04:39 PM
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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.
Old 01-29-2006, 04:54 PM
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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??
Old 01-29-2006, 05:00 PM
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Seems like most of the belt issues are caused by high RPM and factory belt tensioners-not underdrive pulleys.
Old 01-29-2006, 10:04 PM
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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.
Old 01-29-2006, 10:16 PM
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I've got an ASP on mine, and I've got no problems...

-Will
Old 01-29-2006, 11:27 PM
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ive got the slp balancer on mine and have had no problems. got a pretty good seat of the pants difference too!!
Old 01-30-2006, 03:57 AM
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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




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