Thursday, May 19, 2011

Antique Ford Engine Rod Bearing Weight and Suitability

Rod Bearing Weights and Their Importance to Antique Ford Engine Performance

I have identified at least 32 brand names of 1932 to 1938 Ford V8 flanged rod bearings. Weighing 10 pair of rod bearings on a postal scale, I have observed weights ranging from 177g to 211g.

To achieve perfect engine balance, all parts that rotate or reciprocate must weigh the same as similar parts (e.g. pistons, connecting rods, rod bearings). My arbitrary standard is that any pair of bearings should weigh within one gram of the other pairs in a given engine.

One gram = 1/28.35 oz.

One other preference of mine is not to run uncoated bronze bearings on the steel shaft because the old timers say it will be harsh to the crankshaft.

Best of luck with your antique Ford car or truck,
John W. Shelor

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