[TnVTX]

Originally Posted by george kujanski

I've been reading this and have a stupid question. Could someone be determining the bearing clearance as the bearing diameter minus the crank diameter, or what I think is the correct way, namely the gap between the bearing and the crank such as measured with Plastigage?

Using the spec number in the first case will be too little clearance. Any possibility in this? I know it's a dumb question, but......

George

I was using plastigauge just as a ballpark indicator... So, those readings were open to interpertation. (I don't have a bore mic to check rods with bearings in it).
The race engine shop set the clearances to the specs that a local, older, long-time Pontiac racer has all his motors setup at (Bob Crawford if anyone might know him). Bob has built several of these Eagle crank'd motors for his drag racing customers, so the machine shop trusts his recommendations. (Bob uses this same machine shop to perform the machining for his motors).