Originally Posted by fast68plymouth
FWIW, my suggestion for swapping out the 1.38 net ratio rockers for something that’s in the 1.5-1.6 net ratio range ……in this application……..has almost nothing to do with my concern about the max lift change/increase.

Excessive clearance between peak lift and spring coil bind comes to mind...


2021 Challenger 6.4L Scat Pack 1320
100% stock: 1.680, 11.894 at 113.75 (DA 175 ft)
weight reduction, wheels, tires, Hellcat air box: 1.661, 11.686 at 115.97 (DA 710 ft)

1973 Challenger 452 ci street/strip [2008]
pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)