I have a na Rb30 block with vl turbo crank rods forged pistions and vl turbo head. fresh rebuild new bearings bottom end. vl turbo oil pump fitted, test 1 start first go no oil presure/ oil at all. Test 2 change oil pump to standard oil pump, check for leaks on suction side, no leaks. engine starts no oil presure/ oil. Have removed presure switch and oil filter to prime the pump and 2 see if any oil comes out. No oil. Dose anyone know if and what the difference are between a turbo crank and a Na crank. Please any info maybe helpful.