been doing a bit more research and reading on dipper fed big end oiling, and generally old engines
seems as though the general recommendation as of 1939 was to run you new car no more than 500 miles and then to have the oil pan removed so as to clean out...
1. swarf, left over machine cuttings that found there way down into the pan
2. Casting sand! the was referred to as inevitable!
3. dirt, from the assembly process,
4. sludge and varnish.
this was the recommedation for american made automobiles and trucks. funny they dealt with much the same issues as the
indian listeroids.
i am still working on the dipper design, and have most all the parts made up an ready to assemble, soon as i can spare a bit of time to do so.
the design incorporates the following
1. check valve
2. filter
3. pressure accumulator, for a second shot of oil when the dipper is out of the oil
4. air purge function to reduce of eliminate the air that is taken up the tube when it is out of the oil
5. much higher volume of oil delivered, (target is between 5 and 10 times the amount delivered by the top holes)
concerns that have to be addressed
1. the unit has to be light weight
2. the unit has to be strong
3. the unit has to be servicable, the filter will have to be serviced
4. the unit has to work
it has taken not a small amount of thought and design to address all the above, but i think i have it.
the ability to have a larger amount of clean oil fed to the big end brg under pressure, coupled with the use of
a set of brgs that have the needed needed characteristics to form and support the oil hydraulic wedge should
provide a much longer life of the big end. provided that.
1. the clearance of the brg is proper
2. the finish of the crank journal is of a high quality, and of course round, and true in all respects
3. the crankcase is cleaned out to start with
4. 30 weight oil is used
the bottom line is no engine will last as long as one would like useing an egg shaped crank, poorly finished, wrong oil, and sand.
is this dipper design necessary, probably not if all else is right to start with.
the main advantage that i think is a foregone conclution is having a filter would be a benefit.
the rest of the design simply provides a more consistant amount of oil under pressure.
very close
i do have one question, how long are the dippers that folks are drilling to make hollow, from the bottom of the rod cap to the end? and how long are they overall?
bob g