What is marked on the end of the rod bolts.(head) Are you going to have them checked out for things like center to center, out of round, are the weights pretty consistent, pin and rod journal sizing, etc. kinda curious how they check out.
Had a chance to start looking at the Speedmaster connecting rods.
I checked the small end of two rods and using a set of new pins from KB107 pistons I get about .0005”-.0006” clearance, and they seam to be round within .0001” as best as I can measure with telescoping snap gauges and a micrometer.
I checked the big end for roundness but not for size yet. The big end seams to be .0001” or better for roundness with dial bore gauge zeroed.
Center to center length seamed to be 6.125” but this was just using a large digital caliper that usually does not return to zero when closing. It usually reads off by up .001” and I normally only use it for pushrods. So that can’t really be trusted for exact measurements.
The threads on the 8640 bolts supplied with these rods look kind of sharp on the peaks. Maybe cut threads instead of rolled threads, but probably fine for any cheap engine I will end up using these on. The threads definitely need to be cleaned, but instructions say that anyway so it’s not a complaint. They will get a good cleaning and further measurements when I finally use them, but who knows when that will be.
