Re: I hate bronze oil pump gears!
[Re: 70Drop]
#2908300
04/09/21 04:49 AM
04/09/21 04:49 AM
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Joined: Nov 2020
Posts: 348 Isle of Sheeps
Gtxxjon
enthusiast
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enthusiast
Joined: Nov 2020
Posts: 348
Isle of Sheeps
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Go to 'for a bodies only' there is a big discussion about, 'melonized hardened gears'!
One gear is steel and the other is iron, then all you have to know is what your cam is 'made of' to get the right one?
Most billet cams are steel 'of course' and some factory rollers are iron based cores...
Last edited by Gtxxjon; 04/09/21 04:52 AM.
Carpe diem, quam minimum credula postero, thanx Horace!
There’s no point trying to fix stuff that ain’t broke,,, 'but if ain’t broke',,, you is not trying hard enough...
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Re: I hate bronze oil pump gears!
[Re: 70Drop]
#2908302
04/09/21 05:14 AM
04/09/21 05:14 AM
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Joined: Mar 2007
Posts: 3,291 West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,291
West Coast, USA
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Do you run a collar on your distributor shaft? I installed one and it reduced the wear rate on my bronze gear dramatically by limiting the up and down movement of the gear.I was going to have my next gear cryogenicaly treated, but ended up using the melanized gear when i switched over to a new cam. I also installed a Milodon oil pump, which is claimed to take less power to spin at any given rpm.
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)
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Re: I hate bronze oil pump gears!
[Re: jbc426]
#2908309
04/09/21 06:48 AM
04/09/21 06:48 AM
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Joined: Jan 2003
Posts: 8,038 Tulsa OK
Bad340fish
master
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master
Joined: Jan 2003
Posts: 8,038
Tulsa OK
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I don't know if you can do it on a big block or not but on my small block I drilled a small hole in the plug at the end of the galley, that hole squirts pressurized oil directly on the gear. I don't know if this will help or not because its a recent modification but I am sure it can't hurt. It doesn't have to be a big hole at all. I don't recall the size I used but I tried a few different sizes and was alarmed at the volume of oil that came out while pre-oiling. IIRC I used the smallest drill bit that I could use with a hand drill going into steel.
Also running thinner oil helps work that gear less.
Last edited by Bad340fish; 04/09/21 06:49 AM.
68 Barracuda Formula S 340
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Re: I hate bronze oil pump gears!
[Re: 440Jim]
#2908399
04/09/21 01:01 PM
04/09/21 01:01 PM
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Joined: Dec 2013
Posts: 4,715 Wichita
GY3
master
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master
Joined: Dec 2013
Posts: 4,715
Wichita
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That's what I'm running! Hundreds of dragstrip passes, over 7,000 miles and showing virtually no wear.
'63 Dodge 330 11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs. 10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.
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Re: I hate bronze oil pump gears!
[Re: jbc426]
#2908400
04/09/21 01:06 PM
04/09/21 01:06 PM
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Joined: Jan 2005
Posts: 223 California
70Drop
OP
enthusiast
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OP
enthusiast
Joined: Jan 2005
Posts: 223
California
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Do you run a collar on your distributor shaft? I installed one and it reduced the wear rate on my bronze gear dramatically by limiting the up and down movement of the gear.I was going to have my next gear cryogenicaly treated, but ended up using the melanized gear when i switched over to a new cam. I also installed a Milodon oil pump, which is claimed to take less power to spin at any given rpm. I'm running a collar. It helps keep my timing stable, but I'm not sure if it's helped with gear wear
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Re: I hate bronze oil pump gears!
[Re: 70Drop]
#2908402
04/09/21 01:08 PM
04/09/21 01:08 PM
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Joined: Jan 2003
Posts: 17,926 S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,926
S.E. Michigan
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Howard's sells just the gear (without the shaft) for $76.95.
Inexplicably, Howards uses the same marketing photograph as CAT uses.
The CAT part is $19.95, free shipping.
You have to press the gear off and on, yourself.
I wouldn't be super surprised to learn that not only is the marketing photograph the same, but the part itself just might be the same too.
I should probably buy them both and see.
The MP part used to be manufactured locally in Mt. Clemens MI, but I am not sure about nowadays, and the "made in" sticker might have only referred to assembly and packaging....for all I know it may have had a $19.95 imported gear on it all along.
Rich H.
Esse Quam Videri
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Re: I hate bronze oil pump gears!
[Re: 70Drop]
#2908406
04/09/21 01:15 PM
04/09/21 01:15 PM
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Joined: Oct 2007
Posts: 4,213 New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,213
New York
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Both the the Slant 6 and Chevy stovebolt cam drives appear to benefit by a pressure squirt directly to the mating surfaces. I have a feeling (and no more than that) that the rotating gears' centrifugal force tends to spin off any splash oil, and more may decrease surface temperature. Metering sizes: anything above .030" is supposed to be safer from debris floating in the oil which may block it.
Boffin Emeritus
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Re: I hate bronze oil pump gears!
[Re: polyspheric]
#2908469
04/09/21 05:22 PM
04/09/21 05:22 PM
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Joined: Oct 2005
Posts: 8,928 Ontario, Canada
Stanton
Don't question me!
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Don't question me!
Joined: Oct 2005
Posts: 8,928
Ontario, Canada
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The CAT part is $19.95, free shipping. Talk is cheap ... post a link !!
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Re: I hate bronze oil pump gears!
[Re: dvw]
#2908511
04/09/21 08:17 PM
04/09/21 08:17 PM
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Joined: Nov 2013
Posts: 728 Southern Alberta
Uberpube
super stock
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super stock
Joined: Nov 2013
Posts: 728
Southern Alberta
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My used gear has 700+ passes on it. Looks fine. Doug What material, what oil pump?
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Re: I hate bronze oil pump gears!
[Re: Uberpube]
#2908527
04/09/21 09:28 PM
04/09/21 09:28 PM
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Joined: Jan 2003
Posts: 10,780 North Dakota
6PakBee
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,780
North Dakota
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I know this is AMC but it illustrates what lengths AMC went to when it came to lubricating the oil pump drive gear. AMC Oiling Video
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: I hate bronze oil pump gears!
[Re: 6PakBee]
#2908529
04/09/21 09:34 PM
04/09/21 09:34 PM
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Joined: Oct 2005
Posts: 8,928 Ontario, Canada
Stanton
Don't question me!
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Don't question me!
Joined: Oct 2005
Posts: 8,928
Ontario, Canada
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but you can move the cam forward, or backwards, and the gear up or down. This accomplishes absolutely nothing on helical cut gears.The clearance is what it is. The only way to adjust clearance is with a gear that's cut oversize or undersize. And the same applies to straight-cut gears.
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Re: I hate bronze oil pump gears!
[Re: Uberpube]
#2908531
04/09/21 09:36 PM
04/09/21 09:36 PM
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Joined: Jan 2005
Posts: 4,463 Michigan
MarkZ
Worthy
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Worthy
Joined: Jan 2005
Posts: 4,463
Michigan
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I trashed one with only 3k street miles and a couple strip passes. I was running 20W50 Brad Penn the whole time and never even thought about it. Was recommended, just like in this thread, that I check contact pattern on the new gear before running it. Haven't done that yet.
1987 Fifth Avenue - 512/518/D60
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Re: I hate bronze oil pump gears!
[Re: Uberpube]
#2908595
04/10/21 05:15 AM
04/10/21 05:15 AM
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Joined: Mar 2006
Posts: 9,897 MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,897
MI, usa
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My used gear has 700+ passes on it. Looks fine. Doug What material, what oil pump? \ Bonze gear. Indy single line pump cover with the Melling thick rotor pump. 5w20/30 JR1 synthetic. Cam endplay is controlled with a Jessel belt dive. Doug
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Re: I hate bronze oil pump gears!
[Re: dvw]
#2908645
04/10/21 09:18 AM
04/10/21 09:18 AM
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Joined: May 2005
Posts: 2,015 Apollo, PA.
B1MAXX
top fuel
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top fuel
Joined: May 2005
Posts: 2,015
Apollo, PA.
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My used gear has 700+ passes on it. Looks fine. Doug What material, what oil pump? \ Bonze gear. Indy single line pump cover with the Melling thick rotor pump. 5w20/30 JR1 synthetic. Cam endplay is controlled with a Jessel belt dive. Doug Maybe thrust has some thing to do with it I have a Milodon gear drive that sets thrust of the cam and the bronze gear in my 512 is sill in good shape too.
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