Originally Posted by W.I.N. Racing
Originally Posted by turbobitt
Originally Posted by rickseeman
Is that a bad thing? What is your vertical clearance?


I don't have a crank to calculate actual clearance but If I get a crank at nominal diameter than clearance will be .0025-.003( .003 on the center thrust main) . If I base it on the last K1 crank I had(main journals were slightly below min spec) than my clearance will be .0035-.004 (.004 on the center thrust main).
I had a set of full groove Clevite 877P bearings and mounted one in the #1 main to spot check and was pretty much the same.

AG.

Taken from the Cleveite bearing catalogue

“The wall is thickest at 90 degrees from the split and drops off a prescribed amount toward each parting line, depending on the bearings intended application. This drop off is called “Eccentricity.” In addition, there is a relief at the parting lines. Eccentricity is used to tailor the bearing shell to its mating hardware and to provide for hardware deflections in operation. Eccentricity also helps to promote oil film formation by providing a wedge shape in the clearance space. The relief at each parting line insures that there will not be a step at the split line due to bearing cap shift or the mating of bearing shells that differ slightly in thickness within allowed tolerance limits”
Its a good read if you want to know bearing specifics..


Thanks but I have already read it and well aware that there is eccentricity built in but was hoping the catalogs would have more specific informataion than just low/medium/high ecentricity....
AG.

1970 Challenger w/572 Hemi street car and my pride and joy. 1986 T-Type with 272 Stage 2 Buick V6 engine - True 8 second street car. Just updated the engine and put down 928 HP @ 35# boost to the ground on chasis dyno. 1976 Cee Bee Avenger Jet Boat - 460 Ford powered.