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Originally Posted by Scufty
curious but I have been told that a guy should have resticters in the heads if running a high volume opil pump ? thoughts?
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It's generally wiser to start a new thread when asking a different question such as this; you'll usually get more answers. That being said,
this thread answers your question to a point. There are varying points of view on this, as with most things here. FWIW, I have Edelbrock heads with Harland sharp rockers, which have a bushing and not a bearing as the Erson rockers mentioned in the thread. You want a larger hole with bushings (or stock rocker arms) than with bearings. My car is a street cruiser, so I wanted more
oil to cool the valve springs. I'm currently running 5/32" holes in the restrictors; this is what I started with, not wanting to have too little
oil. It seems about right for me, others will probably gawk at that large of a hole. The
oil comes to the heads from a hole in the engine deck, into a hole in the head, which comes at an angle to an undercut bolt which holds down the rocker arm assy. Aftermarket heads are a bit different, but they all have the angled hole which feeds oil up one of the rocker arm stands on either side, from there into the center of the rocker arm shaft to a hole in the bottom of the shaft to each of the rocker arms. Drill and tap the angled hole to 5/16-18. Take a 5/16-18 bolt, drill a hole in the center of the threaded portion, and that is your restrictor. Cut the threads off so they’re about 5/16” long, cut a slot across the top of one side for a screwdriver, deburr everything and install in the heads.
Good Luck and welcome to the club,
Dan