Boarder Line Low Oil Pressure

Dan the man said

I agree with you. The engine does have a issue big time. Do you believe in the use of full grooved main bearings? I could've misunderstood you but I thought that earlier you said that they are a good idea and yet in post 21 your saying that they are not good for oil pressure.

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Full grooved main bearings are an attempt to provide more consistent oil flow to the rod bearings. Similar is/was cross drilled crankshafts. The problem with fully grooved main bearings is the reduced surface area. Similar is cutting a groove in the main journal, recommended for the old Chev sixes. Abetter option than full grooved is 3/4 grooved.