Sorry, I can't make sense of this.
Given, that extra oil is desired to the rockers because of the continuous spring pressure (no "lash" interval), and that they wanted to distribute the oil to the bottom (load bearing area) of the rockers.
Both rocker shafts are continuously fed by the distributor block in the center, and they feed each adjacent pair of rockers through a single hole.
A flat or groove along the length connecting the hole to the inside of the 2 rockers will deliver more oil, but the groove should not extend beyond the edge of the rocker on either side. If the groove reaches this point, the pressure is lost, and the oil will always take the shortest path: out the sides, instead of into the rocker bushing. This means that the rockers closest to the distributor (#3 & 4 intake) gets more oil, the rocker next to it ($3 & 4 exhaust) gets some, and the other 8 rockers farther away (at cylinders 1, 2, 5, 6) get less than before.
The rockers I've examined all have a radial groove to distribute oil inside the shaft hole - but not to the edge. The "squirt" hole on top is not connected to the groove.
The RAS shafts have "banana" grooves that connect each pair of rockers to the original shaft hole - but not to the edge.
Possible explanations:
1. it's not an original shaft, and was made by someone who doesn't understand how it works ("I'll just save some time by making a single groove").
2. it's an original shaft, but a machining error (why it wasn't sold)
3. there are more parts needed to do this
4. ???
Well this was the exact concern of my mechanic. Youve brought up a great point that the shafts could be machining errors. Im hearing about 60% of the responses say Im ok to use these shafts with the grind, and 40% say they're not sure if they will be OK.
