Originally Posted By Cab_Burge
I have a 400 stroker motor, 4.300 stroke, with a set of 440-1 heads with a set of paired shaft Jesel 1.55 ratio not aluminum, (maybe chrome moly steel?) rocker arms. Jesel tech said they don't make any rocker arm with any other material than aluminmum shock shruggy Mine are not aluminum tsk shruggy
I'm using both pushrod and spray bar oiling in it.
It has a custom grind Ultradyne solid roller cam with right at .770 net lift and either 275 Lbs on the seats with 750 lbs. open or 390 lbs. on the seats with 910 lbs. opened confused I did set them up with between .060 to .080 from coil bind on all the springs up My notes show both pressures so I will have to check that and write down the correct numbers on the build sheet realcrazy
This is my first motor with a paired shaft rocker arm system, I haven't ran it yet but it will go in the bracket car this winter luck I'm hoping it is not a part breaker luck

Cab, i found the only way to catch rocker arm bearing failure early was either visual,(remove rocker from the 5/8 shaft) or turning the rocker a full turn on the shaft to feel if it is somethooth or not.
Keeping a very close eye on lash in my motor is very important, .002 change loose and i will be looking for the problem. Exact same position within about five degrees is a must when checking lash because i see up to .005 lash change due to cam flex.

8..603 156 mph best, 2905 lbs 549, indy 572-13, alky