underdrive pulley help - Subaru WRX Forum
 
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#1 Old 11-14-2008, 03:06 PM
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underdrive pulley help

where can i get a belt that fits the an underdriven crank pulley
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#2 Old 11-14-2008, 04:13 PM
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Is it underdriven or lightened? I don't have pullies but I would think the adjustment would take up enough slack to run a standard belt on an underdrive pulley. If it lightened as most Subaru pullies are you use the same belt.
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#3 Old 11-14-2008, 09:25 PM
 
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Ka-Pow !!

These are the belt sizes for the Unorthodox Racing pulley (underdrive)

New Belt Sizes (The belt sizes used may vary slightly. We recommend the use of Gates Brand belts.
• Alternator / Water Pump Belt – Gates K050330 (33 5/8” or 855MM), alternate belt size use K050336 (34.25” or 870MM).
• Air Conditioning Belt – Gates K040340, (34 5/8” or 880MM), alternate belt size use K040335 (34” or 860MM).
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#4 Old 11-14-2008, 09:52 PM
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Ka-Pow!?!
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#5 Old 11-14-2008, 10:06 PM
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Yeah, he's hitting you with some knowledge... batman style, apparently

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#6 Old 11-15-2008, 09:30 AM
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I'd avoid using anything that's underdriven. You'll run into more problems then what you'll gain. If you insist on using them, you could also stop by an Advance, ask for a belt a little smaller then yours. Try it out, if it doesn't work, go back and get another one since it'd be free to exchange.

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#7 Old 11-15-2008, 07:28 PM
 
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I went with an underdrive on my '95 impreza L, because it was available cheap ($26 e-bay), and only weighed 1 lb. Since I deleted the power steering on that car, as I did on my spec944 car, it was necessary to size "custom" belts. If you measure the pulley length with a string and count the ribs, a parts store should be able to get a fit for you. For instance on the L it was 25" around the pulleys and they had 5 ribs. NAPA hooked me up with one that fit perf !

Ka-pow was just the excitement of still having those sizes sitting in an e-mail from when I bought my ## pulley.
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