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Cam and valvetrain longevity....??? low duration high lift...

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Old 09-30-2016, 04:43 PM
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What would it matter what side?

I think that is normal MK cam wear Tim.
Heads and Cam have to be tuned up every season. Try some 800 grit.

This is a Marine Kinetics cam after 35 hours, see normal.





Dammit Joe beat me to it.
Last edited by ICDEDPPL; 09-30-2016 at 04:49 PM.
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Old 09-30-2016, 04:44 PM
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Originally Posted by I.C.U.Lookin
My guess is both will look the same. This isn't an anomaly or the first one like this. Quite common actually.
Thought it might be why he had to lean that side down. Wasn't getting as much duration.

I'd confirm 100 % seat and open pressures all good and no coil bind. Then probably making a phone call or going for a drive with cams in hand.
Last edited by getrdunn; 09-30-2016 at 04:53 PM.
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Old 09-30-2016, 04:51 PM
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Originally Posted by ICDEDPPL
What would it matter what side?

I think that is normal MK cam wear Tim.
Heads and Cam have to be tuned up every season. Try some 800 grit.

This is a Marine Kinetics cam after 35 hours, see normal.





Dammit Joe beat me to it.
My crower cams or your crane 8620 billets didn't look like those, and they've been around the block quite a few times.
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Old 09-30-2016, 04:53 PM
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Old 09-30-2016, 04:55 PM
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Originally Posted by MILD THUNDER
Thats the LS firing order cam he got from Bob Madera. Heres another one of bobs cams that was pulled out of an engine with 35 hours. looks like 8620 cam to me.
That is definately 8620
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Old 09-30-2016, 04:55 PM
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Originally Posted by ICDEDPPL
I'd hate to see his lobes if he was spinning more than 5400rpm.
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Old 09-30-2016, 04:56 PM
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Originally Posted by getrdunn
Thought it might be why he had to lean that side down. Wasn't getting as much duration.

I'd confirm 100 % seat and open pressures all good and no coil bind. Then probably making a phone call or going for a drive with cams in hand.
Obviously you want to cover all avenues. However this not being the first or an abnormal ordeal kinda lends to what the issue is.
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Old 09-30-2016, 04:59 PM
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Originally Posted by ICDEDPPL
Right looks like Tim's is a 5150 which is a cheaper core.
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Old 09-30-2016, 04:59 PM
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Mine have a little mark. Can you feel anything with your finger Tim or are you too busy kicking the dog and throwing tools??
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Old 09-30-2016, 05:01 PM
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Originally Posted by Black Baja
Right looks like Tim's is a 5150 which is a cheaper core.
It`s probably not even A Marine Kinetics Cam.
Tim!!????!? WTF!?
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