[Jay S]

Originally Posted by Singleton

Here’s a recent video from Powell’s Machine Shop, where he says the same thing about not restricting flow to the lifter, and shows the damage done to a customers roller lifters by restricting the lifter bore. http://https://youtu.be/KRt55CphSqU?is=zWZhVwuzjss33_W_

That guy in the video had his oil restricted down to about 1 gpm with his .1” orifice before the oil even made it to the lifters. Maybe he had 2 plugs on each bank, maybe 2 gpm at most. Either way, is a lot of restriction before the oil is even close to getting to the top end.