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My R5 engine has them. They are common in circle track. I blocked the stuff off in my old R3 block.

Thought they may come in handy with street driving and all. Bob was told to leave them be so they are still there.

Problem is the oil gets really warm and of course the pressure drops a lot with hot oil. I thought about a cooler. I suspect a lot of the heat is from the oil sprayed on the bottom of the piston. The piston is being cooled but at the cost of the oil temperature.

Does anyone have an engine that previously had this such as a NASCAR R5 and took them out?

I don't want to make room for an oil cooler.

Leon

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If you don't have an oil temp gauge, it's "guessomatic" time. This might not be your case, but I see too many running coolers unnecessarily - and running oil temps well below the mfgs suggested oil temp operating range. Install a gauge first.