[d.j. moordigian]

Originally Posted by MikeK

The chamber is dry? Who built this pressure system? No pinhole nozzles to squirt oil on the valve stems and lifter contacts? No bleed hole to keep the chamber full with wet felt feed wicks running oil up to the top of the valve stems? No road draft vent hole in the upper rear of the cover to draw crankcase mist across the valves? Anything? What cools and lubes the valves? I'd worry more about that than 10psi to inserts that will run all day with near zero pressure in an A.

Look at a "B". Two quarter size holes in the chamber floor..