bronze dist gears
04-05-2007, 03:39 PM
#1
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bronze dist gears ok 2nd question of the day! i have a lunati solid roller cam in a bbc, will it need a bronze gear?? both manufactors kind of point the finger. cam card says check dist manufactor.. and dist says check cam!! will a gear on a msd pro billet be ok on a solid roller??
04-05-2007, 05:22 PM
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I just ran into that issue today myself. My builder is finishing my bbc and called me to tell me the pro billet dist I brought him didn't have a bronze gear.It was a new dist and I forgot to order a bronze gear for it.Mine is a solid roller also and i've always been told that the bronze gear is needed,but someone please correct me if I am wrong 
04-05-2007, 06:52 PM
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A standard solid roller cam will require a bronze gear unless you specifically request a special core for the cam or order certain "street" solid rollers such as those from Comp. In particular if a Comp roller part number end in a -8 it will require an iron gear. The cam card usually will provide you a clue.
04-06-2007, 06:19 AM
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ok i knew alot of new roller cams dont need the bronze, i would buy a bronze gear regardless as long as a bronze gear could get along with the new cam gear, may be an answerless question!! ill try to call lunati today -
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04-06-2007, 04:13 PM
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The metal used in solid rollers was much too strong for the dist gear,
so it was much easier to change the gear on the dist. We just bought a new solid roller from Howards, it had the coolest thing. They now have a 2 piece solid roller, the gear section comes on & off. So it's not billet gears like it always was. We didn't ask for it or knew it until I opened it to get the card out. Just more for u to watch out for, just be careful, if it's a solid roller with a solid billet core, I would use the bronze gear, if it's the newer style do as Andereck said and check the card or call.
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The metal used in solid rollers was much too strong for the dist gear,
so it was much easier to change the gear on the dist. We just bought a new solid roller from Howards, it had the coolest thing. They now have a 2 piece solid roller, the gear section comes on & off. So it's not billet gears like it always was. We didn't ask for it or knew it until I opened it to get the card out. Just more for u to watch out for, just be careful, if it's a solid roller with a solid billet core, I would use the bronze gear, if it's the newer style do as Andereck said and check the card or call.
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04-07-2007, 10:48 AM
#9
The metal in a factory hyd roller and solid rollers are the same hardened cores. Ask about the melonized and see what the manufacturer says. Bronze is self sacraficing and needs to be monitored over time. The melonized GM gear should last the life of the engine.
04-07-2007, 11:22 AM
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The cores for most hydraulic rollers are cast, as the lower cam in the picture below. The upper cam is typical of most solid rollers and is ground from a steel billet. These cams require a special gear, unlike most hydraulic rollers and some street solid rollers.
The upper cam is a Comp -9 and the lower is a -8
The upper cam is a Comp -9 and the lower is a -8
04-08-2007, 07:10 AM
#13
Originally Posted by andereck
The cores for most hydraulic rollers are cast, as the lower cam in the picture below. The upper cam is typical of most solid rollers and is ground from a steel billet. These cams require a special gear, unlike most hydraulic rollers and some street solid rollers.
The upper cam is a Comp -9 and the lower is a -8
The upper cam is a Comp -9 and the lower is a -8
Those are definitely different cores. My comp hyd roller looked like the top cam...but it had a iron gear installed so its moot.
However as I stated what one will eat the other will too. Thats why GM came out with the melonized gear. The option I was listing I was told could be used in both instances whether it had the standard roller or the iron drive gear. I also used a bronze tipped fuel pump pushrod when I was using a mechanical fuel pump.
So are you saying the gear I'm talking about won't work with a solid roller?
BTW this is a GM LT4 HOT cam. It sure looks like your first core. Gm recomends the melonized gear for this cam.
http://i17.ebayimg.com/06/i/08/00/cc/ag_1_b.JPG
Last edited by The stunningman; 04-08-2007 at 07:24 AM.
04-08-2007, 12:15 PM
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The melonized iron gear is specifically for GM hyd roller cams and cams made to their spec. They are not to be used for standard aftermarket billet steel camshafts such as the picture above. Ford also used melonized iron gears with their hyd roller camshafts.
The cam below is typical of an aftermarket cam and can use a non surface treated iron gear. With the billet roller above requiring the bronze drive gear.
So, use a melonized gear with an OE cam, whether its a straight OE application or a GMPP cam, otherwise check with the cam company.
The cam below is typical of an aftermarket cam and can use a non surface treated iron gear. With the billet roller above requiring the bronze drive gear.
So, use a melonized gear with an OE cam, whether its a straight OE application or a GMPP cam, otherwise check with the cam company.
04-08-2007, 06:52 PM
#15
Is a LT4 cam a -8 or -9 core? BTW I took a look at my stock LT1 hyd roller cam and it looked more like the top cam and none like the bottom cam pictured.
Last edited by The stunningman; 04-08-2007 at 06:58 PM.
