I have a 2.3 ford race motor. When I start it up cold, it has 35 pds of oil pressure and continueously drop as the engine warms to 20 pds. The last race its had fallen to 10 pds as I came off the track. I can't get to race this car because of this problem. I've had this engine apart 3 times this summer. I have installed a new oil pressure gage and oil line. I have changed rod bearings and mains 2 times. I put in a new crankshaft with matching bearing and plastic gaged them with .03 clearence. I've had 2 new high volume melling oil pumps in, and went as far as to shim the spring in one of them. I took the alluminum Essy Head and had it aline bored and new cam bearings installed. I have changed engine blocks and all oil ports have cleaned and all oil plugs put back in. I have no oil in the water or any oil leaks to the outside of the engine. Why can't I get oil presure ? Please, anyone,,lol