Value of Engine Balancing

[Stuart Giles]

Thanks everyone. Just what I was thinking. Flywheel, clutch and crank. I'll do the overall and end to end weights on the rods myself

Apologies for the double post. NFI how that happened!

Charles

Certainly worth taking notice of the end-to-end weights rather than just balancing for the rods' deadweight i.e. overall weight.

If the B/E weights were different on rods where the deadweight is the same, that newly balanced crank will be out of balance the moment the rods are fitted; all the B/E weight of a rod is rotational, whereas the small end weight is reciprocating. Obviously, in this case, there wouldn't be much point in getting the piston weights spot on either, with a heavy/light small end weight spoiling the reciprocating balance.