My new engine is having an oil pressure issue. At idle I make 25psi hot, 50PSI at 1000 rpm and 65+ above 2000 rpm. I've been doing some freeway testing and after 15 min at around 2,500-2,000 RPM I got off the free way and oil pressure dropped to almost zero. We're not talking hard on the breaks or down hill just sitting at the light. I put my foot in it to bump it up back to 25 so it was not idling at zero. Twice now I've seen it do this. HV pump running 20-50 Joe Gibbs oil. Factory car pan. Maybe 200 miles on a full build. Balance, blueprint the whole nine yards. I'm on my second oil change, I drained it at about 100 miles and cut the filter just to make sure all was well. No metal in the filter. 11.5-1 comp ratio. Big lumpy cam (dont have the specs on hand) Any ideas, I'd hate to pull the engine again but I also dont want to ruin my new engine... Engine was built at a very good, high performance machine shop.