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Originally Posted by patrickt;101****
If, after carefully breaking in my solid flat tappet cam, choosing reasonable ramp rates, high quality components, always using Brad Penn and adding the original GM EOS supplement, plus sending my oil off to check the zinc/phos. content (which usally came back over 1500ppm)... if I wiped a lobe/lifter I would indeed throw in the towel and use a hydraulic roller. But I believe that quality components, reasonably ramp rates, and high zinc/phos oil will let your solid flat tappet cam outlive you. I don't know what would be in the current mix that would cause otherwise. |
Don't forget the last step, the one with a two handed finger crossing..
I know there's lots of FEs (and otherwise) out there that have and will continue to survive the incessant onslaught of the EPA and most
oil manufacturers. The point is, as the years pass, the likelihood of survivability is diminishing, both at break-in and the following years. If a failure occurs you're out much more than the original investment for hydraulic rollers. I find (as some respected FE engine builders have found) that worry and risk unacceptable.
I do enjoy a good hearty valve adjustment now and then though..