I'm pumping too much oil into the heads at race RPM. Does anyone here restrict the oil to the rocker shaft? what size restrictor and can I place it into the pedestal and not the block?
That'd be difficult John, the oil runs up around one of the studs in the ones I've looked at and frequently the threads are larger than the body of the rocker bolt making it more difficult to use a sleeve there as a restricter. Do you have solid tip pushrods? If they are hollow you are getting a double dose of oil. Most recently I've used a head gasket with no oil hole and pushrod oiling.
You might try for a custom stud with a larger body, maybe a clearance to the pedestal in the .005" range. Or maybe a stud with a full diameter body and a sleeve in the hole. That might make it easier to tune the oil flow.
Jim
I was using hollow pushrods, but just changed them out. I haven't had a chance to test since the swap, so maybe this isn't an issue any longer. And I was thinking about the 1800 MGB pedestals, not the Rover pedestals, you are correct about the oil traveling around the bolt and not through a separate oiling hole. Thanks for the clarification!
There is a little "oil way" under one of the rocker posts, the oil comes up and along the shafts.When I used roller rockers I made up a reducer to slow the path of the oil. I completely blocked it off when I went to hollow pushrods