[michaelfind]

Originally Posted by Sirrotica

Good video on XE comp cams:

https://www.youtube.com/watch?v=mH31...BlackLabGarage

As HB said, he engineered the High Energy series of cams, and quit, and after he left comp, the extreme engery cams came about. I used a whole bunch of the HE cams in just about every engine family at that time, only one failure in a sludge ball BBC. I've never used a XE cam because of the failure rates, and noise problems, I've seen, and heard about from other people in the business.

I have to agree, back in the day we probably did every thing today that they tell you not to do when changing cams, and they always just worked. That included factory cams as well as, aftermarket cams. In 1977-78, is when wiped cams and lifters started to show up very frequently, mostly at first in SBCs, and then in everything.

That is what I recall as well. In the 1980s, we saw HFT failures a few times. Seems to be more common in recent years but I remember them happening even in my small circle of motorhead friends well before the 2000s.