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Distributor Gear Size

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Old 05-23-2010, 06:31 AM
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Car: 85 Iroc-Z
Engine: 383 TPI Procharger D1SC
Transmission: TKO600
Axle/Gears: Strange S60 3.73
Distributor Gear Size

For my current engine build, I have decided to get a new composite distributor gear. What size gear do I need to get? .491 or .500 diameter shaft? It has a factory coil in cap HEI distributor. Thanks
Old 05-23-2010, 10:44 AM
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Car: 1987 Camaro Z28
Engine: 355ci, XE262 , 650dp
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Re: Distributor Gear Size

all of the factory HEI's that ive had to deal with (1987 and up) have a shaft diameter that is smaller than .491 and .500. i had to go junk yard shopping for a different gear or wait for a part out of canada.
Old 05-23-2010, 03:55 PM
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Re: Distributor Gear Size

My distributor is the pre 87 model. Anybody know the size for that one?
Old 05-24-2010, 02:01 AM
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Re: Distributor Gear Size

Originally Posted by 85Iroc-Z
My distributor is the pre 87 model. Anybody know the size for that one?
.491" is Factory sizing, .500" is for aftermarket distributors such as a MSD

Edit: to clarify, yours will have a .491" shaft

Last edited by 1986Z28OWNER; 05-24-2010 at 02:20 AM.
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