If you think about it, going through our questions, the following items were addressed by this bunch of engineers:
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Front Strut Bar - If you din't see it on the marketing cars....you will...There is a massive metal ring on the top of each strut tower that has beams attached to them that run back to the firewall. Completely different than the 135i
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Extra Water Cooler: Driver side front
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Upgraded Power Steering Cooler
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Upgraded Rack Ratio
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Completely different tune, although on a very similar engine. - We were describing how we were driving the car trying to make the appointment at M and one engineer told me, "the only reason you haven't spun it is becuase you left the traction control on...." He also dropped that this would occur because....
there is more under that pedal than might be printed in a brouchure....
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Lightweight Flywheel, a lot lighter, as described to us, its as light as could possibly be used in a dual mass application.
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Dry Sump Light weight transmission, totally new for this application
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New Driveshaft, lightweight to addapt to the new transmission
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M3 Differential with dynamics for the shorter wheelbase considered with integrated cooling fins
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Complete M3 suspension - Control Arms, Shocks, and other components. The shocks use the stock points as the M3s do, however, they are completely different for compression and rebound, similarly the bushing are the same size etc, however, are cast for the 1M application, Sway Bars and something else I'm forgetting right now....Ask away, you might jog my memory.
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Brakes....I lost nights of sleep wondering why they used the brakes they chose...here's why: When they tested the 6 piston upgraded brakes from the 135i they had very high temperatures, and issues with the rotors given the cars extra HP and speed. They jumped from these to the E92 M3 Brakes to see if it would improve things, and it did...but for good measure they tried the M3 GTS brakes (Floating Caliper) and some aftermarket as well, but found the GTS brakes to be too loud, too expensive and no better performance (in this application) then the regular E92 M3 brakes. All they had to do was recalibrate the Vehicle Dynamics, ABS etc, and change the rear pads to a different compound to compensate for the shorter wheelbase, lower weight and the way the car reacted on a couple of the messier corners at Nurburgring. The E92 M3 brakes offer the ability to use rotors that have the swept area mounted to the hat via vertical posts. These verticle posts allowed the rotor to expand and contract considerably, consistently, repeatedly without having rotors issues. These rotors were designed to be used with the E92 Calipers...and those Calipers were designed to be used with the M3 Competition wheels...therefore...
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