Quote:
Originally Posted by Pete_vB
It sounds like the motor has been "blueprinted" from the factory. It's common for most components to come from the factory in a range of tolerance "bins"- pistons might come in 4 bore sizes and different weights, etc. By putting the best parts together (choosing the largest piston diameters, lightest weight rods, etc) you can build "stronger" motors from the factory. Porsche used to do this sometimes for "special wishes" cars, where a good customer or Porsche exec would get a factory special that would dyno 10-20 hp stronger than an average car without any on-paper changes.
It makes some sense that they would upgrade the critical components such as rings and choose the best parts for the M cars; it's virtually free as they have the whole range of parts to choose from. It might buy you a little power and it probably gets you more reliability, but nothing dramatic. Not exactly make or break either way- as long as the price is right I'm fine with this motor being "the same". This car is about the package, not the motor...
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Exactly!!! i also particularly agree with your last line...
"This car is about the package, not the motor.."