Cam gone flat? Here's a interesting video.

1MeanA said
Interesting video although I don't think he came to any conclusions about the issue other than to just use roller cams because he doesn't know what the actual issue is. I would love for a cam manufacturer to explain what exactly goes on during the break in phase. The way I see it if either the cam lobe slope/angle or lifter crown are not matching the band of contact will be too narrow and cause partial film lubrication and rapid failure.

What he said although he didn't say it was the actual cause of the failure.

1MeanA said
Often people mix and matches cams and lifters so no wonder there are issues not that buying them from the same manufacturers would be any sort of a guarantee these days as there are supposedly only a few lifter manufacturers left. I read an article last week saying each auto manufacturer used to have its own lifter crown spec. As he mentions these specs and input from the auto manufacturers has probably long ago disappeared. Buying a cam and lifters that match may well be a crap shoot these days.

True that. Not a good idea to mis match cam and lifters if you need warranty later.

1MeanA said
I'm in the middle of a budget build and got my hydraulic cam and lifters from Oregon Cams. They say they haven't had issues with the lifters they supplied (cheapies I think). I checked for lifter rotation and it looks good. I'll run proper break in oil and cross my fingers. I really didn't want to spend another $2k for a roller cam (lifters, cam, springs, pushrods, rocker arms) on a stock 340.

I'm with you there. A roller set up is not cheap. I have been lucky not to have a failure but I haven't swapped many cans either.