I am trying to compare the usage of a stock SBC 4 Qt pan (7.5”) depth and a 7 Qt aftermarket deep sump pan (8.25”) depth with the associated matched extended pickup for the pan (below) both pans have baffles and in this case no windage trays are used; also a HV oil pump is used:
I know there is two purposes of using a deep sump pan:
1. To reduce the windage of the oil: the deeper pan in combo with the kick outs lets you run an oil level lower than OEM to keep it further from the crank by running 4-5 qts in the 7 qt pan
2. To run 3 additional quarts of oil to extend oil change intervals, protection of oil starvation due to leakage etc
My question is in a SBC 383 (400 crank) is there an advantage of running oil levels further from the crank ? What would be the noticeable effects of running the oil level too high be ?? Would the oil splashed splashed on the cylinder walls due to windage over power the rings causing oil consumption to a point until the oil was at a level below the crank that would not be effected by windage ?