Yep, yep. I left that out. My apologies . These are roller followers
with the cam lobes applying force between the pivots and the valve
stems. There's a hydraulic lifter under it as well and they provide a
1.8:1 "rocker" ratio. The GM Northstar uses the same setup, I believe.

I recall an article on that test bench as well. I have no idea where I
put it though .

I was looking over some F1 stuff too. I realized that the rules don't
limit head/cam configuration other than the number of valves. Those are
3 liter motors turning 18,000 to 20,000 rpms with, typically, five
valves per cylinder. Pushrods aren't excluded explicitly but they
simply are not viable in such an environment both because it would be
almost impossible to design the cam, pushrod, and rocker arrangement
just to drive all the valves, and because the compliance in the
valvetrain linkage would cause them to fly apart dramatically. But
there are still issues with valve springs and cam contact and such.
They have been exploring solenoid activated valves in those motors: no
cams, all computer controlled. Pretty cool .
..
Dan
2003 Cobra convertible
With some stuff and things