fredag 18 april 2014

Piston weight

I got a question from Kjell Roar regarding piston weights before and after the modification to clear the WW 69.5 mm stroker crank. I came to 403 - 404 grams uncut and 399 - 400 grams when modified. In the picture above you see the pistons before and after.

The "X" on the piston skirt on the modified one was there already when I tore the engine down. As I see no sign of this industrial engine ever been apart I guess it was there from the factory. Anyone knows what it might mean?

Edit: The weight is including the piston pin and rigs.

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