[jaykay]

....I searched way back. IIRC on renntech, or Planet I found a Cayman racer that had fitted the old style to help mitigate oil related engine failures. I also know a guy who used to campaign a Cayman all over The States and said he has run both styles but never let on which he found to be better.....I think he has blown more than 6 engines so other failure mode combinations are masking any potential oil problems

I have seen in the past that LN Engineering Site recommends the newer straight discharge style with their latest sump extension arrangements. There was no explaination as to why.

When i was tracking and deep sumped way back I wanted the old style separators returning oil under the windage tray where the pick sits. It seems there are now on top return arrangements; I will be honest and say they make no sense to me. Perhaps they return oil quicker and or reduce foaming.