Re: Longer lasting roller cam distributor drive gears?
[Re: scratchnfotraction]
#1041553
07/27/11 07:02 PM
07/27/11 07:02 PM
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Joined: Jul 2010
Posts: 295
Vallejo, CA
ditchdrift
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Vallejo, CA
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Quote:
my SB roller cam has the iron gear pressed on to it to run a stock itermed shaft 
been in since 07 as a daily driver with the lunati voodoo roller cam
Hmm, i can tell that this is a one piece billet cam. Yours must be a two piece cam.
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Re: Longer lasting roller cam distributor drive gears?
[Re: scratchnfotraction]
#1041555
07/27/11 09:23 PM
07/27/11 09:23 PM
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Joined: Jul 2010
Posts: 295
Vallejo, CA
ditchdrift
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Quote:
maybe not all sb cams are like mine,but IIRC it is billet with a cast iron gear pressed/pined on it.
how could that be if the bearing journal is larger?
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Re: Longer lasting roller cam distributor drive gears?
[Re: ditchdrift]
#1041557
07/27/11 10:48 PM
07/27/11 10:48 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
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IIRc,the rear end of the cam shaft has a smaller journal than the rest,the iron gear slides over it and is pressed on its journal and the bearing journal in front of it is bigger..ect.. the BB cam journal is to big to press the gear over and they all need the bronze gear as it is an all billet cam. I could deff see 2 diff colors of metal on my roller cam and could see it was pressed on like they said. for a piece of mind,i used the drive gear from a stock sb roller cam engine, which stock cams have the gear pressed on also. I have one on the shelf and will look it over again 
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Re: Longer lasting roller cam distributor drive gears?
[Re: dusterbd13]
#1041558
07/27/11 10:51 PM
07/27/11 10:51 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
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Quote:
how do you tell if ones going? ive had mine in for about 4k, and it just seems down on power. havent checked timing yet, though.
you will have to  it for wear if your talking the drive gear or cam gear
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Re: Longer lasting roller cam distributor drive gears?
[Re: scratchnfotraction]
#1041559
07/27/11 10:55 PM
07/27/11 10:55 PM
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Joined: Jul 2010
Posts: 295
Vallejo, CA
ditchdrift
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Quote:
IIRc,the rear end of the cam shaft has a smaller journal than the rest,the iron gear slides over it and is pressed on its journal and the bearing journal in front of it is bigger..ect..
the BB cam journal is to big to press the gear over and they all need the bronze gear as it is an all billet cam.
I could deff see 2 diff colors of metal on my roller cam and could see it was pressed on like they said.
for a piece of mind,i used the drive gear from a stock sb roller cam engine, which stock cams have the gear pressed on also.
I have one on the shelf and will look it over again
I wonder how i can tell if mine is that way, its an older crane solid roller that has been reground by comp.
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Re: Longer lasting roller cam distributor drive gears?
[Re: ditchdrift]
#1041560
07/27/11 11:04 PM
07/27/11 11:04 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
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a re-grind would do nothing to the gear check with crane and see what they say,dont recall crane sb roller cams needing the bronze either. on my lunati it was a light color and the gear was a dark color and kinda had the blueing look from heat treating maybe might try posting this on the race board also,much more roller guys over there for sure  I see what the stock cam looks
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Re: Longer lasting roller cam distributor drive gears?
[Re: scratchnfotraction]
#1041561
07/27/11 11:28 PM
07/27/11 11:28 PM
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Joined: Oct 2005
Posts: 8,879
Ontario, Canada
Stanton
Don't question me!
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Don't question me!
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Ontario, Canada
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Quote:
on my lunati it was a light color and the gear was a dark color and kinda had the blueing look from heat treating maybe
The roller I just got from Lunati is the same - kinda has me curious - can't se why the gear would need any different treatment than the lobes !!
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Re: Longer lasting roller cam distributor drive gears?
[Re: Stanton]
#1041562
07/27/11 11:34 PM
07/27/11 11:34 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
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the iron gear pressed on plays nice with the drive gear the cam core is billet steel and much harder,will eat the billet/iron gears up in short order. hence the bronze gear for the BB,it takes the wear and is replaced more often. the lobes and rollers are billet steel and do well with each other as far as hardness. I am no guru but this is what I found doing my research for my sb roller cam swap. what spring do you have for your lunati? the lunati springs are doubles and need machine work,i went with the comp 901-16 spring and droped them on and swaped the cam with heads on. the comps drop on and use stock seals and retainers, are with-in 10# of the spring rate of the lunatis and no valve float at 6200 rpm. I used 5 lunati sb cams with the comp springs now,they work great had a set of the lunati double springs for a door stop for a while was the only down side on my research 
Last edited by scratchnfotraction; 07/27/11 11:41 PM.
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Re: Longer lasting roller cam distributor drive gears?
[Re: scratchnfotraction]
#1041563
07/27/11 11:35 PM
07/27/11 11:35 PM
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Joined: Feb 2004
Posts: 4,501
Gainesville,FL
goldmember
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Gainesville,FL
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Quote:
IIRc,the rear end of the cam shaft has a smaller journal than the rest,the iron gear slides over it and is pressed on its journal and the bearing journal in front of it is bigger..ect..
the BB cam journal is to big to press the gear over and they all need the bronze gear as it is an all billet cam.
I could deff see 2 diff colors of metal on my roller cam and could see it was pressed on like they said.
for a piece of mind,i used the drive gear from a stock sb roller cam engine, which stock cams have the gear pressed on also.
I have one on the shelf and will look it over again
Stock cams do not have the gear pressed on,it's a 1pc cast core. The billet 2pc crane cores a easy to spot, copper between the lobes but not the rear gear/journal area which is not machined,but cast,with a large pin in the end of the bearing journal. Crane is back and has the 2pc cores. If this is a weekend toy/bracket racer just use the cam you have and check the drive gear every year. Some last for years and I'd avoid Comp cams for this item.
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Re: Longer lasting roller cam distributor drive gears?
[Re: 451Mopar]
#1041567
07/28/11 10:53 AM
07/28/11 10:53 AM
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Joined: Mar 2007
Posts: 3,285
West Coast, USA
jbc426
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West Coast, USA
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I am running a locking collar on my distributor shaft to help keep not only the timing steady, but also to keep the bronze gear down where it's suppossed to be, in the hopes it will lengthen it's life.
I'm wondering if having the indermediate shaft and gear cryogenically treated will help it last longer.
Last edited by jbc426; 07/28/11 10:54 AM.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
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