I was worndering what size oil hole restrictors your using to the shafts, if any? I have a motor with 440-1 heads and Harland Sharp stock shaft type rokers that I want to dyno test soon, I tried using a restrictor in the fitting in the head but I didn't like it so I drill and tapped the bottoms of both of the adapter fittings to 10x32 so I can use a stock Holley bleed in it to limit the oil to the rockers and not end up draining the oil pan by over oiling the rockers

Im running .050's in mine.

Cab,

I never ran them. But because they are needle bearings, they should not requiree much oil at all. I have seen T&D's where guys dont have any plumbed oil and use an oil can between rounds.

.042" in each fitting at the head. Would like to go smaller but haven't found a smaller bit yet.

.050

FWIW, area difference for various orifice size. It many not be exactly flow, but close enough to get the point across.

Mike, I'm a street and bracket racers so pouring oil on them after every round is not a option. I have a set T&D 1.65 ratio stock shaft type rockers on my 527 motor with Indy SR heads, I will convert those restrictors to use Holly carb bleed sizes by drilling and tapping the adapter fittings that the hoses attach to. I did that to the 518 motor with the Harland Sharp shaft rockers yesterday but I'm not sure what size to start with, no sense in burning up the pushrods or shafts so I guess it is better to start to big and go down. I'm going to cut the top off of a old OEM stock rocker cover and intall it on the motor so I can prime the oil pump and rotate the crankshaft assembly over to watch how much oil comes out of the rockers with different sizes restrictor in the fittings I had primed the 527 motor with a piece .080 welding rod stuck into the fittings and the oil pour out profusely, which made me thank that it might not be enough restrictor. I thank the air bleed in the oil line path is the better way to go, I'll post on the results later this week.

.050 in mine 2500 miles, no wear on rockers or pushrod cups.

on my sr,s with t&d,s,i tried no restricters and had low oil pressure.with advice from this site,i tried .060" restricters,in each head.i still had too much oil up top and low oil pressure.i went down to .040" in each head,and it has worked real well. good oil pressure and not too much oil up top.
with the design of the t&d,s,i think you can get by with less oil.the pushrod tips and cups get pressurized oil.

28 air bleeds, one in each head. i have the milodon oil pump thats pumps alot of oil. i believe the restrictor size depends on the oil pump volume. good luck

Indy sells the fittings with restriction built in.
after installing them on my 572 haven't had any issues with oiling.
your more than welcome to measure the hole size or call Indy and ask them.

.042" here as well. Seemed to work well for me with the HS rockers. FWIW this was on my 65 Belvedere with a 451 and SR's. Was a pump gas street car, when i sold it had 150+ passes on it and 4500+ street miles and never an issue. Oh yeah car went 10.50's at 3770.