Quote:

Half groove main bearings oil the rods for half of the the stroke, starve the rods of oil during the other half of the stroke,AKA crankshaft rotation


That is why I don't run half groove main bearings in my race engine. IMO, the rod bearings need the oil in this application. I haven't seen any issue with "less load bearing area" in bracket engines under 900 hp.


1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1