Water pump pulley diameter
Thread Starter
Melting Slicks
Joined: Nov 2010
Posts: 2,216
Likes: 113
From: Michigan
Water pump pulley diameter
What is the diameter of an 88-91 water pump pulley? Looking at March performance they have two sizes it looks like, 84-87 & 88-91. Of course NOT the LT cars, just the sbc gen1 cars. I have an 86 and it's in storage so I can measure it later. I am aware of underdrive and overdrive ratios, their effects and know what I want. My car only has PS, WP, alt with the correct rotation pump for my belt routing.
I would like to know why there was two size/diameters used if anyone knows.
I would like to know why there was two size/diameters used if anyone knows.
Last edited by BOOT77; Nov 27, 2018 at 06:21 PM.
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Joined: Sep 2003
Posts: 25,393
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What is the diameter of an 88-91 water pump pulley? Looking at March performance they have two sizes it looks like, 84-87 & 88-91. Of course NOT the LT cars, just the sbc gen1 cars. I have an 86 and it's in storage so I can measure it later. I am aware of underdrive and overdrive ratios, their effects and know what I want. My car only has PS, WP, alt with the correct rotation pump for my belt routing.
I would like to know why there was two size/diameters used if anyone knows.
I would like to know why there was two size/diameters used if anyone knows.
Last edited by WVZR-1; Nov 27, 2018 at 08:45 PM.
