David Carter wrote:

Archie,

I was reviewing some cooling info in Racing Beat Catalog last night and
stumbled on their comments about balancing:  "If you intend your race
engine to run above 8500 rpm, or if the engine is a non-standard
assembly, we recommend balancing the rotating assembly.  The rotating
assembly includes both rotors, main pulley, front and rear
counterwegiths, and the eccentric shaft, and the flywheel.  We also
recommend balancing the pressure plate and the flywheel on the rotating
assembly.  PLEASE NOTE:  In our experience it is not necessary to
re-balance a stock or only mildly modified engine operating below 8500
rpm if the rotating parts were originally intended by Mazda to be used
together."  (page 36, 1993 catalog obtained in 1997)

David Carter

 
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