I checked MM specs and it looks like eta crank has counterweight radius of 67.5mm when M52 is 72.75mm
Can I just machine M52 to match ETA crank (take off 5.25mm)? That's only 0.2"..
If ETA crank and 130mm eta rods clear everything with 325i pistons, that should work....am I correct?
Some people are reporting 0.25" or even 0.3" needs to come of. Are they talking about the radius or diameter?
Also if I take off 5.25mm from around M52 crank, that would leave only 3mm (45mm journal with 84mm stroke) for rod journal shoulder..is it sufficient?
Did I calc it correctly: 45mm rod journal, 84mm stroke: 22.5+42=64.5mm to the outer side of the rod journal.
Obviously it will have to be balanced but I don't see how it would be difficult even with that much removed since the crank is three 120' plane design
Can I just machine M52 to match ETA crank (take off 5.25mm)? That's only 0.2"..
If ETA crank and 130mm eta rods clear everything with 325i pistons, that should work....am I correct?
Some people are reporting 0.25" or even 0.3" needs to come of. Are they talking about the radius or diameter?
Also if I take off 5.25mm from around M52 crank, that would leave only 3mm (45mm journal with 84mm stroke) for rod journal shoulder..is it sufficient?
Did I calc it correctly: 45mm rod journal, 84mm stroke: 22.5+42=64.5mm to the outer side of the rod journal.
Obviously it will have to be balanced but I don't see how it would be difficult even with that much removed since the crank is three 120' plane design
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