I know about that low oil pressure issue. My dyno guy wasn't exactly sure what it could be, and he has seen it before a few times, but nothing was wrong with the engines. We changed to a high volume oil pump as well, it didn't affect the oil pressure..I talked to Dave at Hughes Engines as well, he is also aware of the oil pressure, but he said the engine will be fine as he said it's a"loose" engine if you will...I guess cause of the clearances of the main and rod bearings...