MRL Mild 440
What advantage do you see oiling thru the pushrods? I havent given that any thought..
I changed the adjusters on the Hughes rockers from Ball style to cup style for 2 reasons.
First, they don't get enough oil to the cup on the pushrod and they tend to burn up pushrods and adjusters. We just had a BIG issue with that. Have any of you seen the tops of your Cup style pushrods turn brown or blue??? LACK OF OIL! Period! This is a Big issue with high spring rates and/or high RPM.
So running a Ball/Ball pushrod that oils thru will help eliminate that all together. There are custom made oil thru ball/cup pushrods, but they are $$$$$ and I have budgets to work around, so this is a much less expensive option.
Second is harmonics. A oil filled pushrod will not vibrate as much as a hollow one. Think of it this way- hit a hollow tube with a hammer and what happens? It rings, thats vibration. Now fill that tube with a liquid, say OIL, and hit it. What happens? Thud, no ring, no vibration. Thus a more stable valve train. And it helps to keep the pushrod cooler and the adjuster cooler and well lubed. That translates to less valve lash adjusting because things don't wear out as much.
Does this make sense?
