What you will accomplish by pressurizing oiling is getting more oil to the fuel pump eccentric. I'm surprised no body thought of that on this thread yet. not mentioned.
I don't run an eccentric on the race motor. But when eliminating it now on the new motor we will be balancing the top timing sprocket. If you notice small block mopar top sprockets are are drilled to balance the sprocket with the eccentric applied.
We now have a new turner digital balancer so when we do it I'll have my son give me the numbers stating how far it was out of balance without the eccentric. Hope to also lighten it.
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