Noisy 304 and Crank Marks

Robert,
now had some time to think on the issue a little more. The blp "squirters" have an orifice size of 0.026". Last night I had some solder wire 0.050" and it slips into the squirter hole on the 196's connecting rod (hole could be 0.052"). As stated, this hole shoots straight up to the underside of the wristpin/piston.

That diameter squirts what - four times the volume (I think it goes by the square - could even be the cube, though), but in reality it's spitting once per revolution, but nonetheless, looks like those spit holes really put out quite a bit of volume! If the oil's cool, then that's probably the answer.
 
Lightly chamfer the babbitt side of the bearing hole that feeds the squirter hole say a .025 chamfer. It will give you a tad more flow time and more volume.

The absolute most important variable is oil temp as you said.
 
I need to recheck, but I think the hole in the crank journal was well radiused. Also, the hole in the bearing shell is quite a bit larger than the spit hole itself, so I can imagine where that spit hole will be fed by a good sized "arc" in terms of degrees. I guess that would be 0.050" + diameter of shell hole + width of crank journal hole divided by crank journal circumference. Interesting to see how many degrees of rotation for feed that will be (another math problem to solve)
 
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