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Originally Posted by Excaliber
Labor costs and risk management are the PRIMARY reason professional engine builders recommend a hydraulic cam. Thats the PRIMARY reason. It is then justified by pointing out the 'performance' enhancements, high rev potential, blah blah blah. But don't forget the PRIMARY reason, it's easier for them to build, warranty and the parts profit level is better!.
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Excalibur is right on the money -- breaking in a solid lifter cam takes extra work and is a little risky. Breaking in a roller is easy. On the street though you're not going to notice any performance difference between a solid roller and a solid flat. So, if you elect to go with the solid roller be careful about restricting the lifter galleys as you do with a solid flat tappet. Low FE
oil pressures and street idling can limit the life of the solid roller. I believe the problem of a few years ago with the cheap foreign lifters has now passed us by, but perhaps Barry R. could chime in on that. Other than the break-in issue, there is
no real benefit on a street machine to going with a solid roller over a solid flat and, with the solid roller, you still have the specter of limited life. Makes it all simple, huh?
