Most of this is foo-foo nonsense. What makes solid lifters (as someone stated above) a little more vulnerable in street applications is the historically poor oiling properties as idle. What has occured is the bearings break down, cease and the lifter drops it;s inards (yes, I made it up) down the engine and kaboom! However, the bar is not what typically "goes" with these.
Comp Cams is developing a solid roller lifter that increases the
oil supply and direction towards the lifter wheel & bearings for low rpm lubrication. Another alternative is going hyd. roller lifter for street use in that the longevity and maitenance free characteristics make them attractive but with lower revs possible without valve float.
Another thing you need to consider is increased spring wear with rollers due to the much higher spring rates. A mild hyd. roller will help in this area since it doesn't require as much but all in all if your a casual Cobra user like most of our members just buy a small block with hyd. lifters and be "happy"!
