Comparing Mech To Hyd Cam Adv/.050” Durations

what yr said
you are limited with a hyd because the all collapse, some more than others
but all more with a high rate cam - so camgrinders limit acceleration (there are race only hyd profiles where this is compensated for)
IMHO a proper solid will pick up throughout the rpm range
even given that I do not think that an .842 solid will run with a .904 hyd till you really rev it up
The newer tight lash solids are pretty stable lash wise
not so in the 60's when we had to set the lash after every run- that was in a not so sbc with stock rockers and the "400" degree cam
of course it was not 400 at usual lash- but we did do a major tighten to kill the low end for a top fuel and top gas win AHRA nationals