milling the main for oil passages?

[Croustibat]

Originally Posted by Drift_FX

whats your reasoning on this?

less oil flow throught the main bearing, sure. but sr's dont have issues with main bearing oil supply/wear. it doesnt allow as much oil to squeeze throught the bearing and crank on the main so it forces more into the feed hole for the rod, which is where SR's desparately need more oil flow...

SR dont have oiling issues, except when camshaft sprayers get blocked. Or oil pump is worn.

There are so many people bashing these engines saying they are not reliable, and use ultra thick oil to get "the good oil pressures", when they really should replace their worn oil pump ... The way these pumps are made and regulated means the more pressure, the less flow; and if it cant give recommended pressure with recommended oil thickness, it means it does not produce enough flow. Therefore using thicker oil only leads to even more reducing the flow, ultimately killing the engine. Now if you are making more pressure at the bearings, oil flow will go the easiest way, i.e. the place with the least pressure. I dont know if it will go where you want it; i think it would go to the spray bars.

That is where the "CAs and SRs are crap because they eat their main and end bearings" come from. Not enough pressure while clearances and oil are ok ? Change your damn oil pump. Using fancy bearings wont make the pump work better. Not saying coatings are bad, but really if you get oiling problem, get to the root of it. Which, on these engines, is the pump and the spray bars for head problems. And blocked breathers.