Underdrive Pulleys
Saw these on ebay. The specs sound decent.
http://cgi.ebay.com/ebaymotors/03-04...Q5fAccessories
Developed by Vision Motorworks using the latest in CAD design and then CNC machined from a solid piece of 6061 Aluminum billet.
- HARD COATED: Vision Motorworks hard coats all high wear surfaces to increase pulley life. Surfaces are hardened to 65 Rockwel "C" scale. Harder than steel, and two times harder than forged aluminum!
- Will increase Horsepower & torque across entire RPM range.
- CNC machined.
- Reduces the weight at the crankshaft (an average of 2.7 HP is gained from every pound lost off the crank shaft), and parasitic drag loses of the accessories thereby increasing horsepower and torque.
- EXCEEDS ALL OEM belt fitment, alignment and balance specifications.
- Very light for MAXIMUM weight loss at the crank.
- Crank pulleys underdrive all the accessories about 15-20% for maximum horsepower gains without any cooling or charging issues.
- Polished aluminum.
http://cgi.ebay.com/ebaymotors/03-04...Q5fAccessories
Developed by Vision Motorworks using the latest in CAD design and then CNC machined from a solid piece of 6061 Aluminum billet.
- HARD COATED: Vision Motorworks hard coats all high wear surfaces to increase pulley life. Surfaces are hardened to 65 Rockwel "C" scale. Harder than steel, and two times harder than forged aluminum!
- Will increase Horsepower & torque across entire RPM range.
- CNC machined.
- Reduces the weight at the crankshaft (an average of 2.7 HP is gained from every pound lost off the crank shaft), and parasitic drag loses of the accessories thereby increasing horsepower and torque.
- EXCEEDS ALL OEM belt fitment, alignment and balance specifications.
- Very light for MAXIMUM weight loss at the crank.
- Crank pulleys underdrive all the accessories about 15-20% for maximum horsepower gains without any cooling or charging issues.
- Polished aluminum.
Last edited by Escobar; Aug 9, 2010 at 12:09 PM.
I would not personally say that about a product I have not tried or seen a reputable review about.
I have used UR products and they make great pulleys. For my money I would rather go with a proven product.
If you do get them write up a review so people know if these are a good buy.
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I would not personally say that about a product I have not tried or seen a reputable review about.
I have used UR products and they make great pulleys. For my money I would rather go with a proven product.
If you do get them write up a review so people know if these are a good buy.
I have used UR products and they make great pulleys. For my money I would rather go with a proven product.
If you do get them write up a review so people know if these are a good buy.
Last edited by Escobar; Jul 31, 2010 at 05:31 PM.
i have been debating doing pulleys, but it sounds like they are all bad. if i were going to get some I sure wouldn't cheap out on them, cause that's a pretty important part on your engine.





it just sounds more professional