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CHRIS67 · 04-14-2010, 07:18 AM

Steve - I ran underdrive pulleys on a Sonoma for years without any issues with belt wear or otherwise. With very minimal HP increase felt from the change. I did it after a chip, cold air intake, TB spacer, and exhaust. If you are looking at more HP then the electric water pump is the way to go. I've read that they have better flow than a belt driven water pump and are just as reliable as long as they are from a quality manufacturer and all connections are made correctly.

04-14-2010, 07:18 AM	#4
CHRIS67 Join Date: Jul 2008 Location: Columbia Posts: 928 iTrader: (0)	Steve - I ran underdrive pulleys on a Sonoma for years without any issues with belt wear or otherwise. With very minimal HP increase felt from the change. I did it after a chip, cold air intake, TB spacer, and exhaust. If you are looking at more HP then the electric water pump is the way to go. I've read that they have better flow than a belt driven water pump and are just as reliable as long as they are from a quality manufacturer and all connections are made correctly. __________________ Praise the Lowered 67' Camaro - Worked 327, Hotchkis TVS suspension, 4 wheel cross drilled discs, AM radio FTL 05' Silverado - Stock, stock, and stock.