Fired up my fresh 526 stroker on Friday and was disappointed to see very low oil pressure at idle. Anyhow, had to retorque the heads afterwards and in the process of taking the rockers off I noticed the HS shafts have oil holes drilled all the way through - not just on the bottom as is the norm. There's no doubt this would be at least a contributor to low oil pressure. My question is, are all their BB shafts drilled like this or did I get a something that shouldn't have gone out the door ???

Harland Sharp rockers are made so they can’t be installed wrong. Unlike stock rockers.

I think that’s a pretty dumb idea for a high end race part !!

I’m going on 45 years of running them with zero issues.

Did you groove the cam for full time oiling?
If so did you add a oil restrictor to the shafts? If not do so. I use.039 restrictors to each shaft in the block oil passages to the rocker shaft oil passages from the #4 cam journal with full time oiling
No restrictors on bush rockers, just on the needle bearing rockers with full time oiling

I didn't groove the cam but I did drill into the oil passages in the valley then plugged the outer holes. Installed the cam bearing to block oil to the heads and drilled the bearing to get oil from the main.

Different method - same result ... full time oiling to the heads.

Yes, I did restrict oil to the top end but the hole size is .060

FWIW, I had the standard pump on the motor. I plan to swap it for a HV pump before it gets run again. I also had an adustable pressure relief on there and may have had it backed off too far. Going to use leave that off next time as well.

Put T/D on it. Expensive, but no more problems.

i have old indy heads from late 90s. oil supply from back of the block being full time oil.
i got the roller pivot rockers and had to do some research on here because of 5psi hot oil pressure at idle. i seen people using .030to .040" restrictions. i used .040" and my oil pressure is the best
it ever was using the old gold bushed rockers. and my valve cover gaskets are the driest it ever was.
i should of had restrictions with the bushed rockers.

Pressure is a function of volume and restriction. With a given retriction the only way to increase pressure id to increase volume. With a given volume the only way to increase pressure is to increase the restriction. So when I look at 16 1/8" oil holes in each HS rocker shaft I can't see how there would be any pressure up there at all - the oil would flow out faster than it gets there !! Ok, so they're rollers and they'll get oil BUT they also have provisions to squirt the pushrod cups - and I just can't see that happening with so many places for oil to escape the shafts.

One problem with HS is if you have too much side clearance. Believe they recommend 0.010 - 0.020". I run 0.015". Too much clearance will affect oil pressure, how much I don't know. But I have heard complaints over the years.

Personally I think that's BS. There is so much oil seeping past those roller bearings that side clearance sure as hell wouldn't matter - especially .015 between every pair.

And while we're at it I'm wondering just how much the top end restrictors affect pressure. Case in point: I have .060 restrictors in my motor and another member mentions he uses .040 restrictors. A .060 restrictor is three THOUSANDTHS of a square inch in area while a .040 is one THOUSANDTH in area.

When you look at all the other clearances in a motor - main bearings, rod bearings, cam bearings and lifters - the oil through these restrictors is negligible.

I'm scratching my head about my oil pressure issue but I really think putting the high volume pump in is going to solve my problem.

How low is low? I have a rebuilt 440 that has never made "good" hot oil pressure ever since it was rebuilt twice.... Using bushed Crane ductile iron rockers and now Harland Sharp

Well the Harland Sharps sure as hell won't help !!

We only fired the motor for the purpose of finding leaks but on startup it had NO pressure. I had primed it a week or so prior and figured it would have held its prime. Anyhow, I shut it down right away, primed it then fired it again but it had low pressure (like 10 pounds) below 1000 rpm. Above that it was fine. We did have a small leak at the gauge connection and a mechanic buddy figures that may have been part of the issue. It wasn't "spewing" oil but like he says, it wasn't reaching the gauge at full capacity either.

Bull-crap they won’t help. They are one of the best customer friendly companies out there. Look in the mirror.

Crane rockers vs Harland Sharp didn't seem to have any real effect. I also have what might be considered excessive side clearance because with the recommended side clearance it seemed like the rockers were binding. My 440 will make over 60 psi cold idle, but @ hot idle it will drop down to as low as 10 psi

Mopar need the minimum oil pressure at idle,10 lbs. per 1000 RPM has worked well for me for many years.70 lbs. hot oil at 7000 RPM

I really doubt that this is your issue. If you can't build oil pressure you probably have a problem with the pump or perhaps you have a rather large oil leak inside the engine. Maybe a missing galley plug or something like that.

Maybe you should actually read the post. The friendliest customer service in the world isn’t going to change the fact they spew oil like no other rocker !!

No missing galley plugs. A couple weeks prior I posted my concern that I was getting 70 psi priming with a 2000 rpm drill - which would be equivalent to 4000 engine rpm.

Probably the most used most popular rocker out there for both big and small block Mopar for guys that race. So if you are having problems it may be on your end. Follow the instructions and read what other have said about limiting oil. That has to be done with any rocker you use.