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Old 10-15-2003, 02:41 PM   #1
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Join Date: Sep 2003
Location: New Mexico
Posts: 784
Car: 1991 Camaro Z28 5.7 G92
Engine: L98 Tuned Port Injection
Transmission: TH700R4
Axle/Gears: 3.23 Posi G80

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Which distributor gear w/GM HOT cam?

I need to know if I need to change my distributor gear when using the HOT cam. The gear I have now is just a production GM HEI gear from 1978. I know that I don't need a bronze gear because GM recommends a melonized gear. What is this melonized gear and do I have one? Please Help!
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1991 Camaro Z28
L98 G92 Performance Package
All stock
ET 14.7 @ 93.2 MPH 1.91 60' in Albuquerque, NM Elev 5400 ft.
Dyno 231 RWHP 332 RWTQ

Corrected ET 13.74 @99.5 MPH
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Old 10-16-2003, 11:14 AM   #2
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Join Date: Jul 2001
Location: South of Heaven, North of Hell
Posts: 1,263
Car: 1985 Camaro
Engine: .040" over 350
Transmission: T56
Axle/Gears: 9-bolt with 3.45s

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Check out the GM Performance Parts catalog. The distributor with the melonized cam drive (whatever the heck that is) is p/n 1104067.

I'm editing to let you know that you can also get just the melonized steel distributor gear as p/n 10456413.

Last edited by Parrydise7; 10-16-2003 at 11:18 AM.
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Old 10-16-2003, 11:23 AM   #3
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Join Date: Apr 2003
Location: Mount Forest, Ontario, Canada
Posts: 90
Car: 1990 RS
Engine: 305
Transmission: T-5

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FYI Melonizing is a patented process similar to nitriding in that it imparts a very hard wear resistant surface to steel, and has a low coefficient of friction.

Melonizing is different from nitriding in that the surface is porous and retains oil for lubrication for longer life.
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Old 10-16-2003, 12:37 PM   #4
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Join Date: Sep 2003
Location: New Mexico
Posts: 784
Car: 1991 Camaro Z28 5.7 G92
Engine: L98 Tuned Port Injection
Transmission: TH700R4
Axle/Gears: 3.23 Posi G80

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Cool! I guess I am going to have to dish out the cash for a little weenie gear. Too bad I was hoping to be able to use my stock gear. I still have my distributor from the TPI days and it is the small remote coil HEI. If some how I could make that gear fit my old school distributor it would work, right? Aren't the shafts different by like .1 inches in diameter?
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Old 10-16-2003, 12:37 PM
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