The connecting rod boring jig I'm in the process of fabricating will allow me to machine Babbited rods for insert bearings, either the increasingly scarce ones that have been around for years, or the more commonly available bearings that fit a Massey-Ferguson tractor with a Perkins Diesel engine. All that needs to be done to the bearing is to drill one hole in it to align with the oil dipper in the rod. The Perkins bearings are about $5.00 apiece and require the crankshaft to be ground .060" undersize. That allows a worn-out 30 under crank to be salvaged by running a std. diameter, inexpensive bearing. The crank doesn't really care what size it is as long as the journal is round and accurate, as there are lots of NASCAR racers running 350 Chevy engines with Honda rod bearings 1/8" smaller than standard and turning 8K+ RPM.
Jerry
Last edited by Hotrod Lincoln; 01/09/2018 2:35 PM.
