Cam and follower tests.

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Would cryogenic treatment, as often mentioned by our own Mr Hobot, have any impact on cam, or cam follower, longevity ?
 
Have been wondering if the surface finish of the followers might be improved by judicious and careful use of oilstone
 
comnoz said:
It will be the same price -after the master lobe and grinder masters are purchased.

I will need to complete dyno testing and if that goes well I have a couple options for masters.

Of course the prototype cam that I am beating on was a chunk of change.
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So...you are planning to sell this cam? When do you think it will be available?
 
Fast Eddie said:
Would cryogenic treatment, as often mentioned by our own Mr Hobot, have any impact on cam, or cam follower, longevity ?
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Good question. There are lot's of claims and they come from some respectable sources.

But any changes are not something you will see with a hardness tester.
 
A couple of version Jim?

Like a 312a versions... and then an 86c/12c version by any chance...??
 
We should be blessed to have at one option. Asking for more options is a little greedy.

I hope Jim gets a cut of the action for each cam sold.
 
swooshdave said:
We should be blessed to have at one option. Asking for more options is a little greedy.

I hope Jim gets a cut of the action for each cam sold.
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Well if I do the design and masters they will be proprietary. So no question.
 
swooshdave said:
We should be blessed to have at one option. Asking for more options is a little greedy.

I hope Jim gets a cut of the action for each cam sold.
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?!

Jim said he’s going to do a couple of versions.

I’m simply asking what they might be.

I was eager to send more of my $ his way.

Not sure where the greed comes into that...
 
Fast Eddie said:
?!

Jim said he’s going to do a couple of versions.

I’m simply asking what they might be.

I was eager to send more of my $ his way.

Not sure where the greed comes into that...
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Ah, it's how you read it. I assumed it meant a couple prototypes.
 
Jim,
Reviewing some of your videos.
Is it just me or is there a higher likelihood of cam lobe wear on the T/S exhaust lobe next to the tach gear. I know my core that I sent you was just starting to fail by feel with my fingernail test. What is your experience from all the cores that you get to send for re-weld.
Do you see a pattern.
Thinking out loud.
Cheers
Thomas
 
CanukNortonNut said:
Jim,
Reviewing some of your videos.
Is it just me or is there a higher likelihood of cam lobe wear on the T/S exhaust lobe next to the tach gear. I know my core that I sent you was just starting to fail by feel with my fingernail test. What is your experience from all the cores that you get to send for re-weld.
Do you see a pattern.
Thinking out loud.
Cheers
Thomas
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No one position gives more problem that I have seen.

I used to think it was luck of the draw but now I think it was where the softest follower ended up.
 
If you need a Beta tester for your new cam design, well you can keep me in mind.:D
All in the name of progress.
Cheers,
T
 
Reading an article today about how it's necessary to twist the spaghetti noodles, in order to get a clean break and prevent shattering. And naturally :rolleyes: my mind went to the Norton cam and its flexing propensity, and whether the attempts to control that flexing might possibly be counter-productive. Is it possible that the cam flexing is actually "absorbing" some of the hammering transmitted to the followers?
 
Mr. Rick said:
Reading an article today about how it's necessary to twist the spaghetti noodles, in order to get a clean break and prevent shattering. And naturally :rolleyes: my mind went to the Norton cam and its flexing propensity, and whether the attempts to control that flexing might possibly be counter-productive. Is it possible that the cam flexing is actually "absorbing" some of the hammering transmitted to the followers?
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I suppose it could but given the choice I would get rid of both -flexing and hammering.
 
comnoz said:
I suppose it could but given the choice I would get rid of both -flexing and hammering.
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Impossible in an absolute sense.

Consequential cam flexing and breakage is really when you abuse the living sh*t out of it with extreme speed, high valve spring loading, aggressive valve motions and messed up rephasing of the crank/cam for better and definitely for worse, - for road purposes, cam flexing is, in my opinion, not much of an issue.
 
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