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Re: 380mm movit kit (archive)
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Posted by SteveD on December 30, 2000 at 19:01:18:

In Reply to: 380mm movit kit posted by turbo on December 30, 2000 at 02:24:28:

I'll special order the kit if you really want it but make you sign a release that you're willing to put up with the wheel bearing replacements on a regular basis to keep potential shimmy under control. The E39 cars use bearing assemblies different than any other BMW model. They are held on by 4 bolts rather than the single 46mm center nut. We have found in Germany that many M5's (and E39's in general) must have their bearings replaced when upgrading from BMW's floating caliper setup to a fixed piston brake system (such as Movit, Brembo, Alcon, etc). This problem is not just unique to the Porsche brakes.

When a hub bearing assembly develops runout with age, a .002" runout at the hub can extrapolate to as much as .010" at the outer circumference of a large 15" (380mm) rotor. With the smaller 322x32mm rotors, its not as bad.

Also, with the 380mm rotor, you'll need a wheel with an inside clearance of 425mm. I'm not sure if the stock 18" BMW wheels have this and going to 19" is asking for trouble in most parts of the country.

The 380mm kit costs close to $5000. For a little more, you can upgrade both front and rear to 993 turbo components and have better balanced braking. SD

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