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I have the Speedway Adjustable Aluminum Water Pump (short). What part numbers will i need for my 30% reduction set? I assume I have to machine the center of the new upper pulley out to 3/4"??
Asked on 1/24/2012 5:15:15 AM by from Michigan
Lower pulley 91015494 and upper pulley 91015462 will work for your 30% reduction short water pump application. Yes you will need to machine or drill the upper pulley to 3/4" for that water pump. I recommend using a step drill bit (Uni-bit) in a drill press or take it to a machine shop to have the center hole enlarged to 3/4". Do not use a hand drill as there is no way to keep the hole straight and centered.
Answered on 1/25/2012 2:19:11 AM by Eric from Speedway
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