That's the brakes

I put a note in the "Knowledge" base about components used for current spec IM 4 wheel disk brakes. If you have an IM with 4 wheel disks you might want to note down the info for use later if/when you need a brake job. I'll add part numbers and also brake pad info when I have it.

(Message Edited 9/27/2002 11:30:13 AM)

I ordered front and rear cross-drilled rotors to replace the stock rotors on my IM; fronts (Brembo/Ghia) are $118 each and rears (914-4 Porsche Zimmerman)are $137 each. They also offer cross-drilled and slotted, or just slotted rotors, and for show cars they will nickel plate (Ooh, la la).

Cross drilling makes a funny kind of chirring sound when you get on the brakes but doesn't appreciably increase pad wear; the main idea is to lighten unsprung weight and make the brakes work better in the rain. Depending on the number and size of the holes (hole diameter should be same as or less than thinnest acceptable rotor width) individual rotor weight may be reduced by up to 1 3/4 lbs.

Cryogenically treating the rotors will make them last a lot longer (greatly reduced rotor wear) but some NASCAR racers no longer do this as they claim it may make the rotors brittle; since we don't drive as fast as they do that point is probably moot.