Oil Restriction to the Head

[Endangered Species]

On a Gen II Hemi Mopar ( early 2000's non Mega Block) which didn't have the oil feed holes to the head restricted. I'm getting ready to tap the block put, restrictors in. Has anyone had any experience with the size of the hole?
We are oiling through the rocker stock stands and Stage V roller rockers.

Thanks for your help

 

[Budnicks]

I'd call Stage V 1st, see what they say...

Or maybe Ray Barton, Richard Nedball {he's a member here wrote a book on Hemi's},
Koffels Place, Campbell Enterprises, Keith Black, Paul Phaff etc.
or someone that builds Hemi's for a living & actually knows there ****...

The Stage V rockers IIRC direct oil to the pushrod cups thru the shafts/rockers
so no need to oil thru the push rods
Not sure about adding the restrictions in the block thou...

My old Milodon Mastodon 426 style wet blocks/different animal thou
I used a 3/8" pipe plug with a 0.100 orifice IIRC
{don't quote me}, I had a Milodon FC style pan,
2 line #10 {or #12} external oiling system & Milodon pump too...
I had Stage V heads {orig. Replacement style ported} & Stage V Roller Rockers too,
7/16 ths tapered Smith Bros. custom pushrods, for small base circle camshaft
sorry I can't remember all the particulars thou, sold the stuff &
gave all the literature to the buyers...

not sure that helps you much though

I haven't used any of them I nearly 10+ years now
& wouldn't want to give you the wrong advice...

I know not much help either, I only trust the real experts, I'd call them 1st...

Good luck

 

[Endangered Species]

Thanks Budnicks, I'll fire an email over to Eric and see what he says. Hemi's are notorious for putting a bunch of oil upstairs. If you have 4 or 5 quarts of oil in the valve cover then it's not on the bearings. Some builders are restricting not only the oil to the top but also the oil to the cam.
I know the Cast Iron Mega Blocks are threaded for the restrictors. I have Nedballs book, he mentions pulling the restrictors when cleaning the block... but does not go into much of the way of details about restricting flow up top.

 

[Budnicks]

Yeah way too much oil draining back down on the crank isn't good either
I always ran a 12qt system too, no starvation, but there was always a lot of oil up top
kept stuff cool, especially the exhaust valve-spings

Isn't there a way to restrict the oil under the rocker shafts/stands ?
in the feed/bolt holes in the heads too, {don't quote me}
you could restrict the oil to intakes more, still let the exhaust get a little bet more...

 

[Endangered Species]

No, there is one passage on each bank that goes from #4 cam bearing to the heads.... from there it goes to the rocker stand and it feeds the shafts. (the shafts have banana grooves ground into them to help with oiling)
I hear what your saying about keeping the springs cool. BUT keeping the oil on the mains and rod bearings is important also.

 

[Jeremiah]

Is there any way you can put the restrictors in the cylinder heads so they are removable if you want to adjust the orifice size? I was able to simply slip a brass carburetor air bleed down into the oil hole on my wedge and the rocker stud holds the bleed captive.

 

[Endangered Species]

Jeremiah,

Manton told me that I could restrict it at the stands........ BUT I'm using the stock Hemi Stands it's going to be too much of a PIA.

I'll keep digging and see what more info I can come up with. Thanks for all the input guys.

 

[Budnicks]

Jeremiah,

Manton told me that I could restrict it at the stands........ BUT I'm using the stock Hemi Stands it's going to be too much of a PIA.

I'll keep digging and see what more info I can come up with. Thanks for all the input guys.

I thought so, there was a way, up top...

good luck either way

 

[hangn0ut]

Dont put restrictors. Its already restricted being timed by the cam. Hemi valvetrain is expensive enough so why chance burning it up? Make sure the drains are not restricted. Blowby doesnt help any. Supercharged hemis are real good at keeping oil up top. But restricting the oil can be an expensive fix. At least thats the way I see it. I play with a 470" blown,injected,methanol hemi and I worry about running out of oil at the big end. Thinking accusump or dry sump but definately wont restrict oil to the valvetrain.

 

[Endangered Species]

Hangnout - Yha, I agree. I did a little more research. The Mega Blocks pull oil directly from the galley's so that's where the difference is. By pulling directly from the galley it's a lot more efficient so you need to restrict the oil other wise it will flood the valve cover which is not good. Where as mine pulls from the cam journal and like you said, it's already restricted.
So case closed, I'm moving on.

Thanks for all of your input guys, I appreciate it.

 

[hangn0ut]

If your still concerned about oil to the crank you might look into an older mod of oiling the mains through the maincap crossbolts. At least the three mains with those bolts. I have that set up on my 64 Plymouth and I do get some comfort from that direct oiling when that big dual external line system takes its sweet time to register pressure.

 

[Endangered Species]

I've never heard of oiling that way. Do you have any information on it?
We run a accumulator w/ a pre-luber so when the motor is cold I can make sure I have oil to all the bearings before the motor turns over. I wouldn't build a race motor with out one.

Thanks

 

[hangn0ut]

K B used to have a side oiler kit. Thats what I have in my Belvedere. Kit consisted of fittings,hoses a block and 3 gun drilled side bolts. Still needed caps drilled and bearings too. If you have an older KB catalog its in there. I think I have a picture of my set up in my photo garage,64 Belvedere. I also have a similar set up on a JP-1 block thats apart. I can take a look at the main caps to see how they are drilled and post pics if your interested. Hell, I havent even looked closely at that block,dont know if they are even drilled.lol.

 

[hangn0ut]

K B used to have a side oiler kit. Thats what I have in my Belvedere. Kit consisted of fittings,hoses a block and 3 gun drilled side bolts. Still needed caps drilled and bearings too. If you have an older KB catalog its in there. I think I have a picture of my set up in my photo garage,64 Belvedere. I also have a similar set up on a JP-1 block thats apart. I can take a look at the main caps to see how they are drilled and post pics if your interested. Hell, I havent even looked closely at that block,dont know if they are even drilled.lol.

 

[hangn0ut]

Oops,double post. Dont know how i did it....

 

[Budnicks]

Yep, here's the KB side oiler
http://www.keithblack.com/racing_kboil.html

 

[Endangered Species]

Yha, I like to see it for future reference. I clicked on Budnicks link but there are no pictures.

Thanks guys.

 

[hangn0ut]

My plymouth motor oiling set up.

 

[Hemirunner]

Why on earth???? Did someone try and re-invent the wheel on that? Stock hemis aren't restricting any oil to the top end. The cam journal is grooved on #4 for full time oiling. It doesn't need it. They should have left it like the wedges. I run the RBRE rockers with spray bar oilers in the bed plate. Highly restricted compared to stock. No issues on the street.

 

[hangn0ut]

Hemirunner,what exactly do you mean? The pictures show a mod for oiling the mains. KB and others have this available. And now its built into many blocks with a passage running along the skirt.