Well I only put 8k on the cam, I bought it used from a friend and he had probably about 6-7k of hard miles on it with a ton of dyno time, I mean probably a 100+ pulls... and it was not in that shape when I got it, and he was running the same valve springs as I got his heads and associated setup also, again these were 400+ spring rate Comp dual springs which may have contributed to it also, but luckily it was not driven till it caused lifter damage and lots of metal shavings..... But I guess that does explain the higher than normal content of iron when I sent a sample of oil to Blackstone labs to have analyzed.

 

The other lobes look crappy to me, the couple we can see anyway.
Pulled several stock cams with a lot more miles and had a ZZ4 crate motor cam with easily 50K miles on it and all looked better.

 

I've seen a zz4 cam like that too.

At least now you know what the noise was!

 

No there's a different cam in it now with the valve train noise Started pulling it apart this evening to replace the lifters... This was the cam I pulled out last month, and put it away, then I pulled it out to measure the basecircle on it 3-4 weeks later and discovered the bad lobe
The otehr lobes all look ok, its just the pic I guess. You can tell there's a definite shinney spot where the rollers were traveling but soesn't show any wear or grooves.

 

A 211? If so, you sure about that? I've only read where they have been parkerized. My 211 that I pulled out a few years ago which had over 70K miles had some minor lobe wear on the nose.

 

Not for sure, just going by why it looked so different per this thread and what the general consensus was.
http://web.camaross.com/forums/showthread.php?t=533744
Not familiar with what "parkerized" is? On LPEs site, they indicate"All of the Lingenfelter hydraulic roller cams are produced from a hardened steel core with a unique distributor gear" .. not sure exactly what that means, but its definitely different than any of the other 3 Comp cams I have had, and the LPE cam came from Comp as well.

 

One of the lobes on my old gm846 cam was starting to come apart too and that was a billet cam. Thats back when I was running comp R lifters so I'm not sure if I didn't have enough preload on them since I was trying to get them as close to 0 lash as I could or if it was just a bad grind.

 

Had that same thing happen to a BBC solid-roller I did a few years ago; lifter roller seized and at the cam lobe alive... motor had 12 hours of run time on it before there was no lobe left on the cam.

 

You can look it up here:
http://www.powerandperformancenews.c...s/PAPNV2I4.htm
When I bought my 211 it was black in color. I was told it had been parkerized. If I remember correctly it did not look like a billet cam.

 

Interesting enough it says parkerization is done to flat tappet cams because the soft metal coating used in the process helps break in a flat tappet cam, so I'd hope that would not be what is used on a roller cam. If you notice in the pics in the thread I posted the LPE is not rough like that other Comp cam as the roughness would indicate it was cast rather than machined from a solid core, or solid billet steel core. The finish of the center section was very smooth and not a pit one in it. But even the stocker appears to have been milled also, although not smooth, it has the typical CNC mill machine marks on the center section. None of them were black though..its been a while since I did anything with a flat tappet cam, or even saw a flat tappet cam...maybe 20 years.

I don't know for sure, but even if it is, I guess others have posted they have seen similar issues with a billet cam too. I'm wondering how not setting enough preload would cause the wear though like speed_demon mentioned ealier??