My stroker pistons were 547g (with rings) and 699g with pin. I got that Eagle forged crank standing in the garage, you need some dimensions of the counterweights? thickness will be very similar but the shape will dictate the mass of the bobweight.
Odd..... with that piston weight and pin weight (152 grams from your numbers above), I come up with 2121 grams bobweight with the stock heavy 318/360 rods. Something is 'not computing'....The numbers I am using for that computation:
Piston 547 grams
Pin 152 grams (based on your total of 699 grams)
Rings 52 grams
Rod bearing 44 grams
Pin lock 0 grams
Rod small end 240 grams
Rod big end 518 grams
Oil on journal 4 grams
I'd love to see some pix of the Eagle crank clearly showing the counterweights. Yes, part of the target bobweight is in the counterweight shape, but the angles of the counterweights on the crank figures into it too. I'll work on getting some pix of the SCAT cast crank to post for comparison.
BTW, that 1760 gram maximum bobweight for the SCAT cast crank for internal balance has been posted by someone here who has balanced up some of those cranks and found the number on their own. I indirectly confirmed this with a call to SCAT; they stated that they need to add a small amount of weight to these cranks with their approx 1800 gr bobweight sets to achieve internal balance.
