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From digest.v5.n25 Wed Jul 24 13:53:25 1996
From: Jbrucebmw_at_aol.com
Date: Wed, 24 Jul 1996 15:36:24 -0400
Subject: <E36> M3 Tire Pressure

There has been some questions about E36 M3 tire pressures. When my M3 was new and I was going ot take it to the track and autocross I had similar questions. So I called Russ Wiles (of One Lap fame). He then wrote the following in the Spring 1995 M3 Interest group regarding my question:

"What tire pressures should I use with the stock tires? Well Juan, to the disbelief of BMW I used about 32 psi in front ,28 or 29psi in the rear. Keep in mind these are not floppy 60 or 70 series tires. These things are rims dipped in rubber. Air's primary function is to control deformation of the tire. There isn't much to control. I would raise it a couple of pounds at the most for autocrossing. If you want more oversteer,raise the rear or bring the front and rear pressures closer."

I have tried these pressures and they seem to work. Note that I set the tires to these presures at night when the tire temp was 55 to 60 degrees. Thus the hot pressures turn out to be significantly higher and close to 40psi. I also tried higher pressures just to see what happened. Going any more than 4 pounds over resulted in the car feeling skaty and less predictable. I also think that the factory recomended settings are a safe place to start your experimentations and go from thier.

Juan Bruce
BMW CCA 95025
BMW ACA LA
'85 ///M635
'95 ///M3

P.S. All you M3 owners should join the M3 Interest group by contacting Russ Wiles at rwiles_at_dakota.net .

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