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Engine Bearing Clearances
The following clearances are given as a guideline. The exact clearances for your application should be determined by an experienced engine builder, after all the details of your application are considered.
Crankshaft Main Journal
Under 2.675" Diameter Over 2.675" Diameter Thrust Clearance
Street Performance .0017 - .0027 .0022 - .0032 .0040 - .0090
Competition .0022 - .0032 .0025 - .0035 .0040 - .0090

Crankshaft Rod Journal
Under 2.125" Diameter Over 2.125" Diameter Side Clearance
Street Performance .0017 - .0027 .0020 - .0030 .0120 - .0250
Competition .0020 - .0030 .0023 - .0033 .0200 - .0300