Barry R. As for Nascar I think there motors have spray bars and jets for oiling the most important parts of the motor. The spray bars are part of the valve covers and put
oil on each valve spring to help in cooling it. As for the lifters, I know they are flat tappets but have a mushroom shape on the bottom surface for the high lift cams. I also thought they used small jets to spray directly on the contact point of the camshaft and lifter. They use spray jets on the diesels now to help with cooling of the pistons. Turbo and supercharger guys could learn something from this. Lower combustion temps more power and timing. Rick L. Ps what new with EMC this year??