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Motorsports & Track Forum
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Old 07-06-2013, 11:14 PM   #1
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Join Date: May 2013
Location: Boston
Posts: 56
My Ride: 2003 330Ci
Optimal AutoX Tire PSI

Hey Guys,

I am the proud new owner of an E46 330Ci with stock 18" rims. The car rides on Hancook summer tires 225 in the front and 255 in the rear. I am about to take the car out to my first AutoX with it (2 years of previous experience in AutoX) and wanted to pick your collective brains about what the pressures you run your tires at for racing. I know how to experiment and get a feel for what fits my driving style but was hoping I could get some advice on where to start. Oah also the car is a manual so slightly lighter than the auto.

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Old 07-07-2013, 11:27 PM   #2
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Join Date: Jan 2010
Location: Valparaiso, IN
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My Ride: '00 328i
start at cold 38 or 39 psi. it will probably get up to 40. 40 is where i like to have my tires in 99% of events.
all tires are different though. so chalk the edges and adjust as needed.
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Old 10-08-2013, 04:51 PM   #3
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I tend to run about 2-3psi higher in front (exactly what pressure is somewhat tire dependant), which is what I've found to be the finishing touch in making my car handle as neutrally as possible without going overboard on spring rates, sway bar stiffness variations, etc. It is completely neutral, but with 245 section fronts and 265 rears, it can be rotated with the throttle.

For whatever that's worth.
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Old 10-08-2013, 11:59 PM   #4
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really depends on your setup and what tires your running. If it's the Hankook V12 Evos I'd start them at 38 at the minimum and use chalk or shoe polish to determine whether it's rolling over and adjust from there.
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