[Cliff R]

"Cliff, in previous threads you used the term "lifter crash" with 5200 XE phenonoma."

The term "lifter crash" came from a very well known Buick engine builder, who ran into troubles with XE cams in Buick engines back when they were first introduced. They were unable to get those engines to rev past, or at least make power past apprx 5200rpm's. They also experienced some valve train breakage issues as well in several engines.

I was told by a cam designer that the quick closing/opening ramps can cause valve train instability issues at high rpm's.

Whatever the reason(s), makes no sense to me whatsoever to mess around with any technology, or parts that may have issues associated with them. My personal comments are all based on this simple FACT.

Even more important than that, that particular line of cams doesn't bring anything to the table in the way of total power production over older cams, or cams from other manufacturer's that don't have any trouble(s) with their lobe profiles.

Two very basic reasons I stay away from those parts.

This entire topic really doesn't have any more than that to it. A few folks like those parts, some love them, some avoid them, I'm part of the last group, for the reasons we have mentioned........Cliff