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Another piece to the lifter failure mystery
Yep, don't disagree with that.- TooManyToys
- Post #37
- Forum: 6.0 Tech
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Another piece to the lifter failure mystery
It was good that you can't read it as I had to make a correction anyway. To the chart I added the Hertzian contact pressure. The box to the left are the force values against the cam, but the box to the right is (I hope) the compression between the roller and lobe. It seems to fit in line with...- TooManyToys
- Post #35
- Forum: 6.0 Tech
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Another piece to the lifter failure mystery
The mass of the pushrod and valve does have an effect, during acceleration of opening and closing, but the open ramp has a higher amount. It does take work to accelerate anything. Using Escobar's graph on the subject with his SVI motor from 20 years ago.... I played around with the values...- TooManyToys
- Post #32
- Forum: 6.0 Tech
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Another piece to the lifter failure mystery
I worked in R&D my entire career and managed vehicle testing for 35 years, so I can go deep into a rabbit hole where there's no light. And doing that work for so long I've learned there's no absolute answer and hypothesis can be wrong, so don't take this as an absolute. There were a number of...- TooManyToys
- Post #28
- Forum: 6.0 Tech
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Another piece to the lifter failure mystery
Guys, this isn't my normal forum so please excuse my jumping in. I've been curious about this as well and over the past weeks have been trying to research as much as I can. I only have my one motor 6.0 experience but have been looking at as many cam and lifter issues online as I can. BTW, my...- TooManyToys
- Post #25
- Forum: 6.0 Tech
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Another piece to the lifter failure mystery
It will be interesting to see what the cam lobe looks like. I've been doing a lot of reading lately about cam lobe fracture failure due to cyclic stress and Mark (Bismic) pointed me here. Not that it's not a roller failure, but my interest is chicken or the egg.- TooManyToys
- Post #5
- Forum: 6.0 Tech
