How high can a typical BBM HR setup spin before the extra weight of the roller lifters starts to become a limitation? I know some people have used (made?) restricted plunger-travel HRs to squeeze out more RPM. But that's not the "normal" build, is it?
As I've gone faster over the years, my required RPM ceiling has also been raised quite a bit... 5800... 6400... 7000... 7200. How far up my incremental RPM steps could a HR have taken me?
Weight is not much of a factor on stock builds, but becomes an issue with hi RPM race motors. Everything has to be bigger / stronger ( and heavier ) just to be able to handle the spring loads. And the spring loads aren't variable - same big hit at idle as at ......rpm. And while those spring loads are going up, life expectancy is going down. All things to consider when choosing a cam for a particular application. And IMO, the OP's failure is not in that equation and should not be part of the cam choice decision.
