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JOHNCL · 04-21-2021, 05:43 AM

Secondary imbalance forces increase with the square of rpm. Counter-rotating balance shafts are essential in modern I-4 engines with short-stroke, higher-rpm architectures. Less so in a Model A engine's long-stroke, lower rpm world. There, piston speed becomes prodigious before the secondary imbalance forces become intolerable.

04-21-2021, 05:43 AM	#85
JOHNCL Member Join Date: Feb 2020 Location: northern Maryland Posts: 68	Re: The new Burtz Mosel A engine Secondary imbalance forces increase with the square of rpm. Counter-rotating balance shafts are essential in modern I-4 engines with short-stroke, higher-rpm architectures. Less so in a Model A engine's long-stroke, lower rpm world. There, piston speed becomes prodigious before the secondary imbalance forces become intolerable.