Originally Posted by KULTULZ
Was this on flat tappet only?
From how I read their site, it appears to be aimed at flat tappet cams. Here is their quote from "cam and lifter failures".
Since the tray is under the crank, I don't see much of a big deal, but i'm just the messenger! LOL
NOTE: Do not use synthetic oil during the break-in period. It is not recommended to use any type of oil restrictors to the lifter galley, or use windage trays, baffles,or plug any oil return holes in the valley. Oil has a two-fold purpose, not only to lubricate, but to draw the heat away from whatever it comes in contact with. The cam needs oil splash from the crankcase, and oil run-back from the top of the engine to help draw the heat away. Without this oil flow, all the heat generated at the cam is transferred to the lifter, which can contribute to it's early demise.