ZZ4 Distributor Gear on OEM HEI!???
#1
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ZZ4 Distributor Gear on OEM HEI!???
Hey 'sup guys.
I've bought a ZZ4 camshaft to put in my new 350. My previous engine was an all mighty 305 TBI from a 89 Camaro.
The 305 was using a HEI 2 connectors type distributor. I red somewhere that if I wanted to use that distributor with my new ZZ4 camshaft, I'd have to change the gear on the distributor. So that's what I did, and bought a 10456413 melonized gear... and it's loose on my distributor shaft. There's a lash of about 1/16...
How come? So I need to change my distributor? What if I run the engine with my old gear?? What's the difference between 'em (exept what they are made from).
Any help would be GREATLY appreciated.
Thanks a lot.
I've bought a ZZ4 camshaft to put in my new 350. My previous engine was an all mighty 305 TBI from a 89 Camaro.
The 305 was using a HEI 2 connectors type distributor. I red somewhere that if I wanted to use that distributor with my new ZZ4 camshaft, I'd have to change the gear on the distributor. So that's what I did, and bought a 10456413 melonized gear... and it's loose on my distributor shaft. There's a lash of about 1/16...
How come? So I need to change my distributor? What if I run the engine with my old gear?? What's the difference between 'em (exept what they are made from).
Any help would be GREATLY appreciated.
Thanks a lot.
#3
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Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
You know I've got a ton on the shelf, but never looked at 'em side by side. I'm told they are different, and it will chew up the cam..
#4
Originally posted by anesthes
You know I've got a ton on the shelf, but never looked at 'em side by side. I'm told they are different, and it will chew up the cam..
You know I've got a ton on the shelf, but never looked at 'em side by side. I'm told they are different, and it will chew up the cam..
~M~
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
If you are re-using the distributor from the '89 LO3 TBI, you do not need a different gear for the ZZ4 cam. Both are factory roller types, and like madmax said, they use melonized gears on factory roller engines.
You don't want to use a bronze gear on a factory roller cam.
You don't want to use a bronze gear on a factory roller cam.
#7
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I wanna jump in on this. I know that you need a special gear to run roller cams, but what if you going the other way putting a ZZ4 dist. onto a flat tappet cam?
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#10
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GM factory roller cams don't require a bronze gear like most aftermarket roller cams do. They somehow integrate a hardened gear onto their roller cams that is basically the same as on their flat tappet cams.
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