[Jac Mac]

Originally Posted by Barry_R

I've personally gone that far (10,000) and more with plain vanilla Comp lifters - but the next guy you see in the parking lot seems to have trouble getting half that. Never have "figured it out" but it does happen. FWIW - I am a fan of tight lash, really good quality springs that are firm enough, and high idle speeds (1000-1200 min).

Same here, but also add that I cut the groove in the lifter bore to get oil on the lobe & roller, had one car that was getting up to its 6th season with no problems, but 'they' got a bit lazy on the lash checks, put a couple of rockers on with the center pivot upside down & that was it!
I have to wonder when I read threads of this nature what the drivers action was when the noise started, was the get it home factor in play?