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O.K. guys there is a reason why nobody makes a fully grooved bearing but that takes in to play,bearing speed,surface diameter,surface width,R.P.M. as well as centrifical forces . Federal Mogul makes a 3/4 groove main for performance applications . You see every time an internal combustion engine fires it actually bends the crank,not much have you but it does happen ! The downward force that is applied as the spark plug fires is how a engine is rated as far as Horsepower & Torque (so to speek) That is also the reason why the rod bearing as well as the main bearing is not grooved fully ! It requires that added bearing surface to put up with the load .It actually has very little to do with lubrication .There are a ton of other factors that come into play here but that is the general idea .<BR><BR> <BR><FONT size=5 face="Lucida Handwriting, Cursive"><EM>Russ</EM></FONT> <BR><EM><FONT face="Verdana, Geneva, Arial, Sans-serif"><FONT size=3><STRONG>B.L. Machine & </STRONG><STRONG>Russ Fulp Racing Engines</STRONG></FONT></FONT></EM><BR><FONT size=1>1100 E. Orangefair Lane</FONT><BR><FONT size=1>Unit E</FONT><BR><FONT size=1>Anaheim, CA 92801</FONT><BR>714-870-8570<BR> <BR><STRONG></STRONG> <BR><BR><BR> </body>
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