Matching piston weights

chasbmw

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• Mar 1, 2021

• #1

I have a pair of Seibenrock pistons, one piston is 4 grms heavier than the other, what difference should I be aiming for, and where to remove material?

 

nick.ct

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• Mar 1, 2021

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Check the conrod weight as well before removing any material

 

mikeyboy

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• Mar 1, 2021

• #3

chasbmw said:

I have a pair of Seibenrock pistons, one piston is 4 grms heavier than the other, what difference should I be aiming for, and where to remove material?

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As above,weigh the Conrods as well.
Ive seen the inside of the lower piston skirt machined,but I’d probably take some from the gudgeon pin bore,if that makes sense,a bit counterbored from the inside of the pin won’t weaken it as long as it’s not much