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      01-22-2013, 01:18 PM   #296
noro
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Drives: '91 M3, '04 E46 ZHP, '72 2002
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Before this post gets too carried away with an insane volume of misinformation let me just state a few simple facts.

The key differences between the two engines is the PISTON. While it's true that the bore and stroke of the engines is the same and the actual displacement (as in the diameter of the combustion chamber multiplied by its length) is the same. The amount of the fuel the engine will take in during piston extraction and the amount of the compress you will get during piston's travel back depends (among many parts) on the piston head itself (as in the top shape / and overall height).

So, the only way to make 320i = 328i, is to replace the pistons.
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