i know this is FAQuestion but any one knows how is 4 cyl. crank balanced from factory ... (100% rotation + 50% reipr. mass ?) what is the best way to balance it ... i cant find enought info about alfa nord-TS crnak lightening. as we knows lightening rotating parts is the easiest performance .. -1 kg of crank counterweight is equal up to -50kg(long stroke like 2l alfa nord). Nord crank is heavy and have lot of ewight at perifery
... interesting comparison i make between nord 2l crank and fiat TC 2l crank ... both cranks are almost identical bore stroke 84/90mm both pistons and conrods almost identical of weight BUT fiat crank is 3kg lighter and have different placed counterweights fiat crank 4 c. weights alfa 8c.weights
