Solid roller failed again

[Barry_R]

Opinions are like - you know....

Solid rollers can live just fine on the street with a few habits. All the oiling stuff and idling stuff are nice things to do. I don't buy in on the oil spray concept - windage spray aimed at the cam from the crank is not going to see much impact from a tray down below.

What kills roller lifters are impact loads. Too much lash or too light of a spring. Not real fond of synth oils either - the rollers need to roll - not skid. Look it up - roller bearings of any type do not live with impact loads - most require some sort of preload such as wheel bearings, axle bearings, hydraulic roller lifters, etc. Lacking the ability to do this means we need to run them tight - under .010 cold.

The 235 or so on the seat sounds about right for a 6500RPM stainless valve deal. I like to use the Manley Nextec oval track springs - they give me the seat pressure without getting stupid on open numbers, and they seem to last forever.

You guys are reading a lot more into a chassis dyno plot than I can. For all I know the dip could be wheelspin or...?. I think chassis dyno numbers are nearly worthless other than looking for trends.