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Forged to Cast piston in a Blaster


J-Madd

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I think I know the answer to this, but a friend of mine has a Blaster that had a forged wiseco 67.00 mm piston that had a ring snag, and is re chamfering the ports and bought a Namura 66.92 cast piston. Can he just hone and drop this in?

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Guess that makes sense. The molecules are closer on the forged. I was thinking the cast had more room to move because of the space between the molecules, but they could expand into that space, and the forged cannot. I didn't google that shit, was just thinkin backwards.

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I always run forged pistons a little loose... That way when they are at operating temp they are within spec.. Other wise they will be too tight at op. temp. and can lead to heat seizure.

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