Quote:
Originally Posted by Dackelone
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.
BMW has been making some internal changes to the N55 engine as it ages. There are more variations coming in the pipeline. 
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Oh sorry, I misread it. I guess thats what I get for reading and replying on the way to class. Thanks for the clarification.
Quote:
Originally Posted by Dackelone
The newer car designs (F2x/F3x) are so much stiffer than the models they replace. A stiffer(structure) car will handle better. Its just that simple. Better handling equals faster lap times.
Dack
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Honestly, I think we are just about to the point (if we aren't there already) of rigidity being a diminishing return when it comes to handling.