[AL in NY]

James, the valve train is lubricated three ways. First, there is a .055" hole drill in the base of the pressure relief valve to continually spray oil to the rear of the valve chamber. Second, any oil with pressure over 35 PSI is released into the valve chamber by the pressure relief valve. Since I am running the Stipe oil pump which produces in excess of 45 PSI with engine speeds over 1000 RPM's, there's plenty of oil in the valve chamber. The third source of oil is another .055" oil spray hole, but this one is directed at the rear of the camshaft timing gear (see photo). The hole sizes were arrived at by trial and error to achieve an idle oil of 20 PSI. The holes started out with 5/32"with less then 5 lbs idle oil pressure.....................now both are .055" and 25 lbs idle pressure.