Bronze, iron, steel distributor. whats the dif? - Team Camaro Tech
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post #1 of 5 (permalink) Old Sep 30th, 05, 10:25 PM Thread Starter
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Mark
 
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Red face Bronze, iron, steel distributor. whats the dif?

Whats the difference between the different types of material used in the gear and why is it important. I know ive seen this somewhere but for thel life of me I cant remember why.

Mark
Long Gone: 1984 Z28, 1989 RS
Current : 1967 Coupe w/350, 2010 2SS

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post #2 of 5 (permalink) Old Oct 1st, 05, 10:17 AM
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Re: Bronze, iron, steel distributor. whats the dif?

The softness / hardness of the gear needs to be matched to the cam gear material. The cam manf. documentation should tell you which gear to use. Perhaps someone here can give you specifics.

One common issue is the use of a brass gear with a high pressure oil pump. The oil pump puts such a load on the gear that it wears out very quickly.

Dave
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68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI
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post #3 of 5 (permalink) Old Oct 2nd, 05, 11:08 PM Thread Starter
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Mark
 
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Re: Bronze, iron, steel distributor. whats the dif?

Well if brass is so soft, why would one want to use it anyway..? why not just use steel for them all.?

Mark
Long Gone: 1984 Z28, 1989 RS
Current : 1967 Coupe w/350, 2010 2SS

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post #4 of 5 (permalink) Old Oct 3rd, 05, 12:08 AM
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Steve
 
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Re: Bronze, iron, steel distributor. whats the dif?

Because certain billet roller cam cores are softer than cast iron flat tappet cores.
If you use a cast iron distributor gear on a "soft" billet roller camshaft, you'll wear out out the cam's drive gear and then you'd have to replace the cam because the cast iron it's so much harder. Obviously, it's much easier to replace the softer, worn distributor gear.
Also, if you use a bronze (not brass) gear on a cast iron cam, you'll destroy it in no time.

..And not all roller cams are billet and require bronze gears. The Crane 138101 roller cam I will be using requires a regular cast iron distributor gear.

Nov 68 Van Nuys. 327 floor-shift-auto, Frost Green and not much else when new.

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post #5 of 5 (permalink) Old Oct 3rd, 05, 07:48 AM
 
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Re: Bronze, iron, steel distributor. whats the dif?

You can use bronze on any cam but it does wear faster. A steel billet roller has to use the bronze gear or the new polymer gear from comp. A cast cam can use any gear but normally uses a cast gear for longevity. If you use the cast gear on the steel billet it wont wear the cam but the distributor gear will be gone in under 50 miles
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