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

Leon,
Make room for an oil cooler! Our first Drag Week was in 06 with a tall fill RB Block. Cruise oil press. would be 50 at the start of a long drive, and 15-20 by the end of it, kinda scary!

Myself I'd put a cooler on it... even if its in the
back of the car with a air deflector to it or a fan

I too would make room for the cooler. It sounds like the oilers are doing an outstanding job of pulling heat out of the pistons. That's a good thing.

Oil gets also pretty hot in my R5 with those oil sprayers. If you are driving anything else than drag race, you need the cooler.
I use full synthetic 5w-50 mobil and it keeps my pressure at 15psi(idle) in really hot days, engine water temp at 200F.

When i flip the throttle above 2000rpm, pressure goes to 65psi.

Just installed oil jets in my 542 turbo street car engine. Has only run on the dyno so far. I have a huge oil cooler in the car. Hoping for good results. I agree with everyone else... keep the jets and figure out how to fit a cooler.

After reading the replies I decided to put the one I removed back and put the pan back. When I tightened the bolt the oiler just kept going the wrong way. So after looking at the other I noticed one was missing a nozzle and the others were aimed all over the place.

Screw it they are coming out.

Leon

Call me crazy, but I would put money on that being where your oil pressure went. I'm putting together parts for an R5 build and the nozzles I picked up are billet aluminum with three screw in jets installed in the end. They just looked a bit more durable than the other style. Guess I will find out someday.

Does the pistons and especially piston pin get enough lubrication without the sprayers? In R5 block you use dry sump and only oil that is in the pan is from bearings? Nothing comes from the top end as the pump sucks it back from the camshaft "galley"

Interesting point. But, there is plenty of oil being slung off the cranks shaft and connecting rods IMO. The rods have oil passages to the wrist pins. Personally I think the NASCAR boys do this to help cool the pistons as their engines are run hot.

Mopars generally drip oil from the cam on to the crank and that is thrown everywhere not to mention the oil from the heads.

R3 race prepped block use tubes over the cam and roller cam bearings. Also we ran very small feed holes in the lifter bushings. Drain back lines from the heads and a big hole next to the oil pump gear to allow oil to fall behind the last counterweight on the crank. Maybe not as dry as an R5 which also has the camshaft tunnel seals but very close.

I actually know it is not a huge issue because there are plenty of EEI aluminum blocks running with the piston oiler passages completely elliminated. But, some have the enclosed cam tunnel cut to clear the crank also. Just depends on how much stroke they are running.

Leon