I know there has been a lot of testing on the hardness of the gears. Is there a harder oil gear available but one thats not harder than the cam gear?

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67Cuda,FAST EZEFI,340cu,CR=10.25,RollerCam&Rocker (XR268HR,#20-810-9)(#1622-16)(EddyRPM#60779,#7576), (MSD6AL,#6425) A904, GearVendorsOD, 8 1/4,3.55:1, ClassicAir

How hard is the gear on your cam?
Hint: I have seen them as low as 19 and as high as 33 Rc (Rockwell hardness scale)
If your cam has been nitride hardened, it should be in the 40 to 50 Rc range.
DD

Well the cam has been "double nitrided". I don't know the hardness value. Are there harder gears available or do we send a gear to be hardened?

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67Cuda,FAST EZEFI,340cu,CR=10.25,RollerCam&Rocker (XR268HR,#20-810-9)(#1622-16)(EddyRPM#60779,#7576), (MSD6AL,#6425) A904, GearVendorsOD, 8 1/4,3.55:1, ClassicAir

Brennan, Youve spent 5000 Why not get a good gear from the doc for The Humble Asking Price ( Peace of Mind) So as to not throw your 5G's of Time and Money away on a chewed up oil pump gear Trashed cam,,,etc, etc.



Greg

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http://www.youtube.com/hyperpack

now that there greg is advice that will get nominated as David' Vice President! You've already gone down the path, might as well pay the extra 5% and get the right parts. I have shaved costs before and ended up spending it many times over because of it.

BTW, please remind me of this later on when I am pinching a few pennies when I should be remembering to do it smart!

MJ

That was the question- is there one available. I guess so -I'll get one now that I know there is one to get.

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67Cuda,FAST EZEFI,340cu,CR=10.25,RollerCam&Rocker (XR268HR,#20-810-9)(#1622-16)(EddyRPM#60779,#7576), (MSD6AL,#6425) A904, GearVendorsOD, 8 1/4,3.55:1, ClassicAir

search: hardened oil pump gear

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Yeah....Im the one who destroyed this rare, vintage automobile.....

I'll be using a new Melling pump. Looking at the gear it seems to be the same dark color as my new hardened cam shaft. Is this an indication that I already have a hardened oil gear?

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67Cuda,FAST EZEFI,340cu,CR=10.25,RollerCam&Rocker (XR268HR,#20-810-9)(#1622-16)(EddyRPM#60779,#7576), (MSD6AL,#6425) A904, GearVendorsOD, 8 1/4,3.55:1, ClassicAir

No; I tested the gear off my Melling and it was in the low 20's on the Rockwell C scale.

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Used to own:
'82 Dodge D150
Erson 270 Cam, O/S valves, mild port work, ~9.5:1 compression

Currently fighting with an '85 VW Cabriolet

My other passion

Can this test be done without distroying the gear? A better question would be how is this test done?
It looks like my gear is pressed on. How are these gears removed? Is there a special gig required to remove them and install a new harder one?
It looks to me that the gear needs to be supported from the pump side and the shaft pressed out. Does installing a new gear require disesemble of the pump?
One more thing. Doug offers one with a keyway and one without. Are there some pumps that have keyways or is the idea to cut a keyway in my shaft for a more secure fit?

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67Cuda,FAST EZEFI,340cu,CR=10.25,RollerCam&Rocker (XR268HR,#20-810-9)(#1622-16)(EddyRPM#60779,#7576), (MSD6AL,#6425) A904, GearVendorsOD, 8 1/4,3.55:1, ClassicAir

If you haven't done so, yet, I would suggest reading this article.
http://www.slantsix.org/articles/oil-pu ... report.htm

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

I read that article a couple of months ago and as I recall the conclusion was inconclusive. It seems that the problem is complex and doesn't yield to simple remedies. I'm sure a hardened gear is a good thing to have but from what I recall of the article, that in itself is no guarantee that the problem won't occur anyway.

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David Kight
'62 Valiant Signet, White
'98 Dodge Dakota
'06 Jeep Liberty

Growing older is unavoidable but growing up is strictly optional.

Just Pm Doctor Dodge He will sell you the gear and give you instructions on how to get it off / On


Greg

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http://www.youtube.com/hyperpack

How is this test done? Does it ruin the gear?

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67Cuda,FAST EZEFI,340cu,CR=10.25,RollerCam&Rocker (XR268HR,#20-810-9)(#1622-16)(EddyRPM#60779,#7576), (MSD6AL,#6425) A904, GearVendorsOD, 8 1/4,3.55:1, ClassicAir

Any Heat Treater or machine shop with a Rockwell tester can do the test, it does not harm the gear outside of putting a small dimple on it..
DD