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Originally Posted by bimmerjph
Disappointing about the active sound. I mean I knew it would almost certainly have it, but I was still hoping it wouldn't.
Thats also interesting about the crankshaft. I always assumed the MX35i engine was mechanically identical to the standard N55.
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CAMSHAFT,
not crankshaft! Two very different engine parts!
Q: What improvements were made to the N55 engine for the M235i application, if any?
A: It's a normal N55 engine, but receives an enforced camshaft (cast iron was replaced by steel), adjusted software engine mapping, and improved cooling system.
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I always assumed the MX35i engine was mechanically identical to the standard N55.
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BMW has been making some internal changes to the N55 engine as it ages. There are more variations coming in the pipeline.
