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BBM solid or hydraulic roller cams on the street questi #1345223 12/03/12 12:23 AM 12/03/12 12:23 AM
Joined: Sep 2004 Posts: 516 Hanover, Ontario, Canada Moparmatty OP mopar
Moparmatty OP mopar Joined: Sep 2004 Posts: 516 Hanover, Ontario, Canada	I've been getting some information lately that running roller cams on the street in our beloved Mopars is bad news. Ive been hearing stories of the distributor gears burning up rather quickly. I want to run a hydraulic roller in a 500" motor. I also want to be able to drive it 2000 miles at a time if I choose to do so. Is the burning up of distributor gears an actual problem that exists? If so, what's the fix? GM and Ford small blocks have been running rollers for years from the factory with out issue. Matt Tebbutt Ontario, Canada

Re: BBM solid or hydraulic roller cams on the street questi [Re: Moparmatty] #1345224 12/03/12 01:29 AM 12/03/12 01:29 AM
Joined: Dec 2010 Posts: 1,035 Missouri U.S.A. 7 71yelladustr super stock
71yelladustr super stock 7 Joined: Dec 2010 Posts: 1,035 Missouri U.S.A.	FWIW, I built a 496 stroker with a solid roller cam w/ MP bronze oil pump drive gear for my buddies 70 challenger. He has put quite a few miles on it on the street over the last 5 years. I too have heard stories about them not lasting so, I pulled the oil pump drive gear to inspect it recently. It had little to no wear on it. Looked good enough to me, so I stuck it back in. The timing has stayed put and no bronze has been found in the oil filters. I wouldn't worry about it if I were you. 392 gen III hemi on E-85 727 trans Dana 60 10.02@134

Re: BBM solid or hydraulic roller cams on the street questi [Re: Moparmatty] #1345225 12/03/12 04:50 AM 12/03/12 04:50 AM
Joined: Aug 2003 Posts: 43,097 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,097 Bend,OR USA	I heard the same urban myth years ago. I called Crane Cams to order two piece BB Mopar roller cam, stock front distributor drive welded onto a steel core, and they ask me why I wanted one, I siad for the street. The rep siad that they had a employee that had a Roadrunner with a big inch Indy motor in it that had been on the Hot Rod tour multiple yeas as well as the One Lap Around America, I assumed it was a advertisement for the company, and it had around 77,000 mile ssn the original bronze distributor drive with no porblems at that time. My 518 C.I. pump gas Duster has going on five years of street(under 2000 miles total) and strip use on its gear and still looks new The other alternative is a composite gear Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: BBM solid or hydraulic roller cams on the street questi [Re: Moparmatty] #1345226 12/03/12 09:52 AM 12/03/12 09:52 AM
Joined: Mar 2007 Posts: 3,277 West Coast, USA jbc426 master
jbc426 master Joined: Mar 2007 Posts: 3,277 West Coast, USA	I'm running a locking collar on the distributor shaft to keep the bronze gear from climbing up the cam gear. It stabilized the contact interface and decreased the wear on it. It helped stabilize my timing too. About 1500 miles on the motor and it still looks good. If I have to change it again, I will have the next one cryogenically treated too. Last edited by jbc426; 12/03/12 09:56 AM. 1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)

Re: BBM solid or hydraulic roller cams on the street questi [Re: jbc426] #1345227 12/03/12 07:23 PM 12/03/12 07:23 PM
Joined: Oct 2003 Posts: 3,698 NE Oklahoma V Von master
Von master V Joined: Oct 2003 Posts: 3,698 NE Oklahoma	Quote: I'm running a locking collar on the distributor shaft to keep the bronze gear from climbing up the cam gear. How does the locking collar (I use two on my dist drive) help the oil pump/dist grive gear from climbing cam gear when the dist drive is fully seated against the oil pump/dist drive gear? 72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72. Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.

Re: BBM solid or hydraulic roller cams on the street questi [Re: Von] #1345228 12/03/12 08:45 PM 12/03/12 08:45 PM
Joined: Mar 2007 Posts: 3,277 West Coast, USA jbc426 master
jbc426 master Joined: Mar 2007 Posts: 3,277 West Coast, USA	Quote: Quote: I'm running a locking collar on the distributor shaft to keep the bronze gear from climbing up the cam gear. How does the locking collar (I use two on my dist drive) help the oil pump/dist grive gear from climbing cam gear when the dist drive is fully seated against the oil pump/dist drive gear? The first few hours I ran my motor without the collars on the distributor shaft. I could clearly see that the wear marks on the gear were bigger on the gear teeth than they should be with the gear all the way seated on the bushing. The only way the cam gear could make such long wear patterns on the gear, was if the gear was moving up off the bushing while the motor was running, causing the longer contact marks. Once I installed the collars(I run two as well), there was no more free play. The bronze gear stayed down on the bushing in the block, and the wear pattern of the gear became smaller/shorter. 1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)

Re: BBM solid or hydraulic roller cams on the street questi [Re: jbc426] #1345229 12/03/12 10:32 PM 12/03/12 10:32 PM
Joined: Oct 2012 Posts: 1,106 Northeast V VincentVega super stock
VincentVega super stock V Joined: Oct 2012 Posts: 1,106 Northeast	Does anyone want to explain WHY this happens? What's different about a roller cam setup that causes this interaction? Looking for 1975 through 1978 B body 4 door sedan sheet metal or parts cars - monaco, fury, coronet. Please let me know

Re: BBM solid or hydraulic roller cams on the street questi [Re: VincentVega] #1345230 12/04/12 01:08 AM 12/04/12 01:08 AM
Joined: Mar 2007 Posts: 3,277 West Coast, USA jbc426 master
jbc426 master Joined: Mar 2007 Posts: 3,277 West Coast, USA	Quote: Does anyone want to explain WHY this happens? What's different about a roller cam setup that causes this interaction? I think they all do it to some degree, and that's part of the reason the timing jumps around without the collars on. The gear floats up and down as it spins within the up & down freeplay. That changes timing slightly. Once you tighten it up using the collars on the distributor shaft, the free play is reduced and the gear has to spin within the reduced freeplay. It has less up and down motion because the collars restrict that motion. The steel gears just handle abuse and wear better. I wonder if anyone has tried cryogenically treating the bronze gears and seen what the results are. Last edited by jbc426; 12/04/12 01:09 AM. 1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)

Re: BBM solid or hydraulic roller cams on the street questi [Re: jbc426] #1345231 12/04/12 10:49 AM 12/04/12 10:49 AM
Joined: Jan 2003 Posts: 4,395 The Pale Blue Dot Skeptic master
Skeptic master Joined: Jan 2003 Posts: 4,395 The Pale Blue Dot	Crane cams has developed a gear that is compatible with a roller that isn't bronze. I don't remember exact material right now, it's a little early yet.

Re: BBM solid or hydraulic roller cams on the street questi [Re: Skeptic] #1345232 12/04/12 11:02 AM 12/04/12 11:02 AM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	hughes sells a coated gear going by the PN may be crane. http://www.hughesengines.com/Index/produ...mp;partid=26734

Re: BBM solid or hydraulic roller cams on the street questi [Re: Dodgem] #1345233 12/04/12 10:50 PM 12/04/12 10:50 PM
Joined: Jan 2008 Posts: 795 Glendale Az D Darryls-Demon super stock
Darryls-Demon super stock D Joined: Jan 2008 Posts: 795 Glendale Az	I have a solid roller cam in my 440 and the timing does not jump around and I do not use a collar, motor has appox 2500 miles on it.

Re: BBM solid or hydraulic roller cams on the street questi [Re: Moparmatty] #1345234 12/04/12 11:46 PM 12/04/12 11:46 PM
Joined: Jan 2006 Posts: 281 NEW HAMPSHIRE AND MAINE B BIGSTROKER enthusiast
BIGSTROKER enthusiast B Joined: Jan 2006 Posts: 281 NEW HAMPSHIRE AND MAINE	i have a solid roller in my 500 inch motor 12000 street miles no problems at all bronze gear with the collar crane ultra pro rollers $800

Re: BBM solid or hydraulic roller cams on the street questi [Re: Darryls-Demon] #1345235 12/04/12 11:55 PM 12/04/12 11:55 PM
Joined: Jan 2007 Posts: 7,664 IN A ahy master
ahy master A Joined: Jan 2007 Posts: 7,664 IN	I went the solid FT route. I've got about 10k miles on an aggressive MM lobe cam without difficulty. I like the benefits of roller but don't care for the bronze gear wear. I understand the collar helps, a standard volume oil pump helps (hope you don't need high volume for hot idle OP on the street), running light oil helps. Still its a wear item while the steel gear is reliably good for the life of the engine and isn't bothered by a high volume pump. Plus roller is expensive.

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