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Discussion Starter #1
I just purchased a new hydraulic roller cam from Howard's for a 90s small block with a factory hydraulic roller. Their tech line is telling me I could use either the iron cam gear used on the flat tappet small block or the melonized gear used on the factory hydraulic rollers. I was always under the assumption that any kind of roller cam needed to have the harder cam gear. I am posting to get some opinions from those who have been down this road before. I really don't want to take a chance of trashing a $350 camshaft. Any professional advice would be greatly appreciated!
 

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My personal choice would be the melonized gear.


Also, one trick that is worth doing is to cut a small groove in the dist housing between the oil feed band and the gear. No bigger than 1/8" x 1/8"
 

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The Phantom Machinist
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Depends, is it a cast core or a billet 3 piece core with a cast dist gear? If so, you’re fine with an iron or melonized gear.

If it’s a billet one piece core, use the composite gear. I’ve had great results.
 

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My personal choice would be the melonized gear.


Also, one trick that is worth doing is to cut a small groove in the dist housing between the oil feed band and the gear. No bigger than 1/8" x 1/8"
Seriously....
Have you ever seen how much oil an 1/8" groove would move..
Bad idea, not needed, plenty of splash oil flying around to oil that gear......
Bad advice....
Period.
 

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Discussion Starter #5
I believe the camshaft is ground on a SADI core. Would that make a difference?
 

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Seriously....
Have you ever seen how much oil an 1/8" groove would move..
Bad idea, not needed, plenty of splash oil flying around to oil that gear......
Bad advice....
Period.
It's painfully obvious you missed these words ------ "no bigger than".
 

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Seriously....
Have you ever seen how much oil an 1/8" groove would move..
Bad idea, not needed, plenty of splash oil flying around to oil that gear......
Bad advice....
Period.
Only "mod" I do is to grind of casting flash on the cheap distributors. Some have a big enough ridge it restricts oil to the lifters.
 

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Seriously....
Have you ever seen how much oil an 1/8" groove would move..
Bad idea, not needed, plenty of splash oil flying around to oil that gear......
Bad advice....
Period.
Only "mod" I do is to grind of casting flash on the cheap distributors. Some have a big enough ridge it restricts oil to the lifters.
He is talking about from the oil groove that feeds the lifters down towards the cam/dist gear.
 

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9,367 Posts
Seriously....
Have you ever seen how much oil an 1/8" groove would move..
Bad idea, not needed, plenty of splash oil flying around to oil that gear......
Bad advice....
Period.
It's painfully obvious you missed these words ------ "no bigger than".
It's not....
If you are even grinding a 1/16" groove you are moving a shit ton of oil... it's just not needed... Some of you guys create your problems.....
Kinda like a self inflicted gun shot to the chest....
 

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It's not....
If you are even grinding a 1/16" groove you are moving a shit ton of oil... it's just not needed... Some of you guys create your problems.....
Kinda like a self inflicted gun shot to the chest....
Been doing that mod for years and never had that first oiling issue.
 
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