Part of the point I was trying to make was even if you told Mahle clevite you were building a bracket drag motor (which I did) they will still try to convince you to go with a 1/2 groove bearing. There is not a consensus on full grooved.
Yep, from their documents, they believe it is the way to go. I've found test and research articles supporting the use of a full lower, and it is actually more justified the more the engine is powered up.
BUT, like so many things in this world, it all has to be conditioned on other factors specific to the engine.... the limits in oiling the SBM rods at high RPM are a known thing. Where that 'high RPM' range starts, I really can't say.
