paid a visit to my machinest today. I took two rods with me with bearings torqued up to spec using angle method.I set my mic to a journal, 0 bore gauge and measured rod bearing at .0033 before I left the house. He measured .0033 with his bore gauge 0 ing it in my mic. so I am reading the gauge correctly and my gauge is accurate enough IMO. something he showed me though was the bearings have taper in them. .0033 in middle and .0036 off to each side. said to get new bearings, should not have any taper. as far as the .0033 rod bearing clearance, he told me not to get caught up in .0001 of an inch measures. he would run that clearance with heavier oil if that's what he had. these are King bearings, thought they were suppose to be perfect accuracy?
Vertical oil clearance is what matters, so the extra clearance won't hurt a thing. In fact, I'm not so sure even the best rods get out of round at higher RPM, regardless of bob weight.
I also disagree with running a heavy oil. There is ZERO reason to do it any more. Unless you are running alcohol or nitro. I'd get the right bearings and have the clearance .001 less and run a 30 grade oil.
