Not entirely true, they didn`t get a handle on it real quick, but the hemi set up requires a higher rpm than the chevys, thus killing the hemi when they limited it to 10,500. remember when Jenkins couldn't outrun sox-martin for all those yrs, he bitched till nhra put 600 pounds on the hemis, it killed them, and wally parks finally admitted it. And, nascar wont even let the new hemi run . Consequently , mopar engine development has pretty much died, w/ the exception of them putting blowers on the hemi, like the hottest Camaro and mustang has done for yrs.