Originally posted by 1FastVW
I'm still a bit confused. The piston/conrod weigh less than the crankshaft, so how exactly is the 52-58% of p/c weight , the ideal weight of the crankshaft???
It should not be the ideal weight of the whole crankshaft ( but I do like light crankshaft) it is the counter weight and any weight below the crankpin that's matter in this discussion.
As we mentioned, if the Piston/ conrod / crankpin and e clips ( need to be careful, I need to be specific about the parts
)
all weight 10g, then take 5.2g of any material (52%) and put on the crankpin and then see where the crankpin position/ balanced at.
It is overbalance if the pin with the weight not at the BDC and that's our experience.
However, a lot of Mod Nova based engine ( .12 only) are underbalance like JP and Max, so that's what it is.
good luck