I've put together a new 440 build and i'm at the point of priming the oil system. the machine shop supplied a standard volume oil pump[ Melling , m-63] .
I,m using driven brand 5w30 break in oil. Using a 1/2 inch electric drill i can only get 40 psi of oil pressure. The crank main bearing clearance is .0027, rod bearing .0024 .it is a solid flat tappet cam with EDM lifters , Hughes engine brand 1.6 roller rockers and 240 trick flow heads. I have oil flow out of the rocker arm assemblies as i rotate the crank. So my question is ... Is this normal / typical pressure with a standard pump ? I have always used a hv pump in the past with 60 psi or better when priming the oil system.