B0b
Daily Driver
got a bunch of parts today, including 87mm pistons.
They look OK but the piston and pin weighs 60 grams more than the originals.
Some of it is just a different casting, but some is also just due to the diameter being larger, I guess.
I had originally planned on working the pistons and pins to match the weight of the originals, but there is no way to remove 60 grams.
As I recall, balancing an inline 4 does not use bob weights on the crank, because the weight of the rods and pistons cancel out, as long as they are weight matched. If I am correct, then the additional mass of the pistons wouldn't affect balance.
Any thoughts?
They look OK but the piston and pin weighs 60 grams more than the originals.
Some of it is just a different casting, but some is also just due to the diameter being larger, I guess.
I had originally planned on working the pistons and pins to match the weight of the originals, but there is no way to remove 60 grams.
As I recall, balancing an inline 4 does not use bob weights on the crank, because the weight of the rods and pistons cancel out, as long as they are weight matched. If I am correct, then the additional mass of the pistons wouldn't affect balance.
Any thoughts?