Stainless, Bushed PRW Rocker Arms

I forget who made that argument but it seemed logical to me. I tend to agree with you and I’ll also add that the oil distribution HAS to also be a function of oil pressure at the interface as well. 5 psi obviously won’t move as much oil as 40 psi through a fixed orifice.


If it’s hydraulic lifters I always groove the shafts.

There is never any clearance between the rocker and the shaft.

I’ve seen more trashed rockers from hydraulic lifters and no grooves in the shaft than any other thing I can think of.