On the journal pin of the crank, machine a very thin 'groove' all the way around the radius of the pin. This groove would only need to be ~0.010 wide - very thin and only about 0.010 deep. What this would do is allow pressurized oil to envelop this space and provide oil all around the bearing itself. This groove would be small enough to allow oil to flow, especially at 60+psi and would maintain an even film on the journal. I am very tempted to do this on an engine and see how it performs. 0.010 is very small so the sacrifice it may seem to be in lessening the surface area of the journal would actually be highly counteracted by the additional oil in the friction zone. I have an engine I am building for a friend and I may drop this idea on his plate to see if he would be interested in going with it. This is similar to what was done on the SCC Project Z where they 'teardrop' shaped the oil hole - it simply provides a longer track of oil dispersion. Why not extend that further?
