LS Hydraulic lifter limitations

[SSDiv6]

Originally Posted by e vassar

I am running the GM perf LS7 hydraulic lifters in my stocker. It hits a wall in high gear at 7K which occurs between 1000ft and the finish line. Just stops pulling and sometimes has 2-3 light misfires ( banging) . I know the lifters should easily handle 7K ..but is that the limitation? I am running 10-30 oil so staying pumped shouldn't be a problem. I am going to do compression,leak down test and valve spring test as part of off season maintenance. Should I just go ahead and change to solid lifters?... Thanks!

The best guy to field your question is Robin Wright and he is a member here.
He was the guy in charge of the COPO program, a valvetrain expert and also in charge of the engine development for the Corvette and Cadillac LS road racing engines.