OHV question - oil pressure to rocker arms?

[ewdysar]

OK, I am used to running with the oil-soaked felt pad in the valve cover with my iron Rajo head, but as I am setting up my new (to me) iron Roof 8 head, I am considering routing some of the oil pressure up there. At the business end of things, I know that one runs pressure to a hollow rocker arm shaft, with an outlet at each rocker arm bushing. The pressure to shaft can be a fitting at the center of the shaft, or one could go through one of the rocker towers, kind of like running into a main bearing cap on the crankshaft. All of this seems fairly straightforward, so far.

What I can’t figure out is how to get a pressure line to inside the valve cover. Running a line through the side of the valve cover itself seems less than optimal. I know that this has been solved plenty of times by craftier folks than me, how did y’all do it?

Keep crankin’,
Eric

[Craig Leach]

Hi Eric,
On a T-Go head there are two holes tapped to 1/8" pipe, one on the side of the head & one inside the valve cover. A 1/8 ID copper line is used
with two compression fittings. The feral boss is drilled out just enough for the copper line to pass through but not the feral. a length of tubing
is pushed through one fitting then carefully bent in a 90 degree, pushed through the hole on side of the head up into the threaded hole inside
the valve cover area & the other fitting slid over it & treaded into the block. Then the ferals & nuts are installed & tightened. The tubing goes
through the water cavity & leaves tubing to install a compression fittings to on the outside of the head & inside valve cover. It is probably a good
idea to install a needle valve to control the amount of oil going to the rocker arms so it does not fill the tappet valley & run out the throttle
holes.
Craig.

[tman1913]

Both Roof and Frontys I have done the same way fundamentally…. Make a spacer 1/2’ thick. You can then drill and tap a 1/16 pipe thread oil line fittings Sent you a text

Shown is my Fronty set up

[KWTownsend]

Mike,
That is entirely too beautiful.
Those Fronty rocker arms are exquisite!
: ^ )

[Mark Herdman]

Mine are pressurised via the rocker cover hold down stud. Stands are in steel and clamp onto the shaft so shafts can be used for oil ways.