LS Hydraulic lifter limitations

[GUMP]

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!

I can't speak for the LS7 lifter, but I wouldn't even try them in a Stocker motor.

I have had good success with the racing hydraulic rollers (88958689) to 8,000 rpm with a beehive valve spring. Currently, I am running a Johnson hydraulic roller lifter in my 302 and turning it to 8,600 rpm without issues. Both are full hydraulic, not limited travel.