Aluminum RRs good for only 20-30K miles??

[MiracleMax]

I think spring pressures have alot to do with the expected life of the rocker, probably more than anything else

I've got a set of erson forged aluminum roller rockers on a brand-x engine and the engine maybe has 10,000 miles on it, the rockers are shot to poop. Theres a butt load of play at the trunion, however the roller at the tip is in pretty good shape.

They are 1.6 rockers on a solid roller with fairly high spring pressure. the cam is not to aggressive, but its 278 degrees of advertised intake duration with a gross lift of .599 with some pretty heavy springs. The engine has seen 9,000 on the tach and a bit past it on more than one occasion (one time I lost my temper and floored the SOB for a good 15 seconds trying to blow the engine up. no bad luck though, its still together)