BBC Crank Pulley size
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Instructor
Joined: Feb 2018
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From: Usa
BBC Crank Pulley size
Im installing a BBC into my 68 vette that was originally a 427 car. I bought it as a roller. I began installing the engine and 4spd this week and the engine had a 3 shive pulley on the crank. The outer shiv is bigger than the other 2, and hits the crossmember. I dont need 3 belts, its just the one that came with the engine. Question is, are the crank pulleys unique to corvettes or will most work? The crossmember has the notch in it, and its not a concourse car at all. I just want it running/driving. I dont have power steering rn, I plan on adding it in the future and can face that issue then.
If anyone can measure their bbc crank pulley I'd appreciate it. Thanks!!
If anyone can measure their bbc crank pulley I'd appreciate it. Thanks!!
Race Director
Joined: Apr 2011
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From: North of Toronto - Ontario
The OD on my 72 454 is just a little shy of 6-3/4"
Thickness from the mounting face to the outside 1-1/2"
Distance from the center of the first groove to the second is .78"
M
Thickness from the mounting face to the outside 1-1/2"
Distance from the center of the first groove to the second is .78"
M
Is my vette stock?? HAHA
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2020 C3 of the Year Finalist - Modified
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Do you have an AIM for 68. It lists the part numbers and yes there are corvette specific pulleys.
Other year c3 pulleys will work. It depends on how you are going to run your belts if you need 2 or 3 grooves. I have mine set up like the original 427 and I run the crank 2 belt pulley belt to the power steering pulley, the power steering pulley is 2 and the outer belt runs the alternator...You dont have to do it that way , I just like it, I think it looks cool like the tripower
Other year c3 pulleys will work. It depends on how you are going to run your belts if you need 2 or 3 grooves. I have mine set up like the original 427 and I run the crank 2 belt pulley belt to the power steering pulley, the power steering pulley is 2 and the outer belt runs the alternator...You dont have to do it that way , I just like it, I think it looks cool like the tripower
Last edited by Rescue Rogers; Nov 21, 2022 at 08:58 PM.
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,222
Likes: 9,359
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
