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Re: It does not have a de-tuned chassis... (m) (archive)

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Posted by Paul on November 17, 2000 at 19:32:26:

In Reply to: It does not have a de-tuned chassis... (m) posted by jedinite on November 17, 2000 at 18:07:12:


The floating rotors may or may not be an issue.

There are a couple of indicators. #1, the US M5 does not get them. #2:

Roundel November 2000 M3 article states "Brakes, of course, are beefy -- they have to be, with the speed potential -- 12.80" front vented rotors, 12.88 at the rear".

Now compare that to what bmw.com says about euro spec brakes: "To safely master their staggering power and performance, BMW's M models come with a particularly large and efficient high-performance brake system featuring compound brake discs (M5 and M3 compound brake discs all round, M coupé and M roadster compound brake discs at the front). The big difference versus conventional brake discs is that compound brake discs come with a radial anti-friction bearing for the brake disc ring. This floating system allows free thermal expansion of the brake disc rings, thus providing the option to use different materials with the best properties in each case for specific purposes. This, in turn, means that each component within the brake system is able to do a perfect job according to its specific requirements. The result is not only outstanding stopping power, but also a considerable reduction in weight versus conventional brake systems, a significantly higher standard of driving comfort, and a much longer service life."


Regardless, I wouldn't constute brake and engine differences as a "detuned chassis compared to euro spec" as you said. Brakes and engine != chassis, in my book.

Check out the below link regarding the interplay of the BMW chassis. It is written by the head of chassis development at BMW M. The chassis guys exert precision all the all the way to the seats and steering wheel. So when the US takes braking power away, I think it is reasonable to characterize the chassis as detuned.



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