Quote:
Originally Posted by duxthe1
I don't think there is anything to be gained by swapping pistons. The 104.980 has a smaller combustion chamber than the 103 which accounts for the difference in compression ratio. For all intents, the reciprocating assembly is identical between the two motors, discounting the 2V and 4V valve reliefs.
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I thought it becouse of piston dish, m103 piston have a dishies, and m104 pistons are flat what are you think about?
m103 piston
m104 piston