Rocker Shaft Oiling

[Anonymous]

I have a roller tip rocker shaft by Rocker Arm Specialties. Was wondering if there is any reason I SHOULDN'T block off the pressure relief shaft tower on the end of the shaft. I can't see there being a problem with too much pressure in the rocker shaft. In addition I will be running a turbo and want to save the excess volume for the turbo instead of bleeding it off at the rocker shaft.
Good idea? Yes? No?

 

[AzCoupe]

If your talking about the cap that goes on the top of the first shaft (right side in pic), absolutely YES. It needs to be capped off otherwise you will not build up enough pressure to properly lube the rockers and you will definitely damage them. The cap should have a relief hole like the one in the pic (do not seal it). If you don't have the cap, call Gary and he can send one to you.

 

[Anonymous]

does the stock assembly have that cap? Mine has a down spout on the side of the first rocker shaft. What if you block that one off?

Later,
Paul

 

[Anonymous]

That was my question. What is the downside of blocking off the "downspout" as you call it, 65'. It will still have all the pressure that was there and more, plus I will have additional volume available for the turbo. I know I have to cap off the top to keep the pressure up.

 

[Hot 6t Falcon]

Hey guys,

If you look at a late model rocker assembly, it won't have that spiffy front stancion that AZCoupe shows in his picture. ALL of the stancions are the same.

If you've got a spare rocker assembly, pull one of the stancions off and put it on your new assembly.

I spend A LOT of time on this when building a engine because I mill the head quite a bit. If you look at the gasket surface of the head where the oil passage from the block to the head bolt is (last bolt, driver's side) much of the indentation that Ford cast into the head gets milled away. So I spend some time polishing and enlarging that indentation. I also round the hole out of the block slightly.

Next for the bolt hole in the head: The '75 up heads are drilled slightly larger from the gasket surface up to the oil passage to the rocker shaft. I make certain it is open and clean.

Finally I use 78 and later head bolts. They taper to allow more oil to pass.

Some pictures -- first the head bolts.

The head passage

The block passage

Good Luck