If you recall we read an article that claims that rod bearings are oiled by centrifugal force of the spinning crank. That is how the rods get there pressure and feed. According to the article and to Sanborn, who also never used full groove mains, the mains fill up the drilled crank feed passage and the centrifugal force pressurizes
The rod bearings. I am saying that if that is true, that timing is less critical and fill time or dwell time would be more important. According to that article, the rods are not only pressurized when the oil holes line up. They are pressurized all the time.
