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Crank balancing

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p0wersteer

p0wersteer

Automotive
Joined
May 2, 2023
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Dear experts,

If I'm replacing my piston and con-rod to forged lightweight components in my inline 4 cylinder engine, do I need to lighten the crank's counterweights as the reciprocating weight has dropped?
 
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No. The ratio of counterbalance to reciprocating mass is a very woolly number. However there seems little point in fitting lightweight parts and then not taking advantage of a decrease in mass elsewhere.

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376
 
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