Bearing preference

[70tp]

What is the preferred or not preferred engine bearing now?   About to do a new build and was sent coated kings bearings and my machinist says he prefers others instead. Looking for some input.    Thanks guys

[oldiron.fe]

                should be good bearings-coated a plus----if detail needed check each bearing half with ball mic. at 9 points near each end and near center to be sure of fit--crank for taper/radii proper        clearance--like old carpenter measure twice-cut once----(before power tools for young guys info.)--------------oldiron     

[SSdynosaur]

Personally, I have had success with King's uncoated bearings in an FE drag racing application and, actually, better consistency of measurements than either FM or Clevite/Mahle. The reason my experience is limited to the uncoated version is, simply, that their coated version was unavailable at the time I purchased several set at once of the uncoated and there are still several sets remaining in stock. Any future purchase will be coated "if" available in size and application.

[70tp]

This guy said he has seen some flaking of the bearing material in some high load applications and I’m not sure if that was an isolated incident or an ongoing problem with a specific brand or some other issue causing the problem.   I’ve only done stock style stuff in the last 20 years and most of the newer bearings didn’t even exist way back or for the applications that I have done since