C218 CLS63, 2011 - 2019

Track tire pressure

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Old Mar 27, 2013 | 05:52 PM
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mjpolo's Avatar
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2007 CLS550
Track tire pressure

I have been running my 2013 CLS63 at the track for DE events. I'm wondering what tire pressures people are finding work best. I am using the stock wheels and tires. Last weekend I ran in the upper 30s. Any suggestions/input appreciated.
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Old Mar 28, 2013 | 05:11 AM
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MKB-C32's Avatar
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As listed in my sign
There is many factors so no one will give you a solid answer, best is to try your car and start from 20 don't worry to go lower than that, I found 17 is the best for my 900hp Porsche.
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Old Mar 28, 2013 | 10:07 AM
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2007 CLS550
Wow 17psi. That is amazing. I guess I'll just have to try going lower. What characteristics am I looking for to judge if too low/too high? The CLS is a pretty big, heavy car so I was concerned with going too low.

____________
2013 CLS63
2013 ML350
2011 Audi S4 (sold)
2009 CLS550 (sold)
2006 BMW 530i (sold)
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Old Mar 28, 2013 | 10:10 AM
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2008 CLS63 AMG 030
Originally Posted by MKB-C32
There is many factors so no one will give you a solid answer, best is to try your car and start from 20 don't worry to go lower than that, I found 17 is the best for my 900hp Porsche.
How fast are going?
My understanding is that you need more tire PSI above 150 mph to prevent tire failure @ the side wall of the tire.
When I drive @ or above 180 mph. (Not on public roads) I have been running mine @ 50 psi.
The tires do spine a lot more when under heavy acceleration @ lower speeds.
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Old Mar 28, 2013 | 10:14 AM
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The track I have been running (http://www.motorsportranch.com/) the max speed is around 110mph. Numerous turns with heavy acceleration. Ideally I would like a set of track wheels but haven't pulled the trigger yet.
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Old Mar 28, 2013 | 06:41 PM
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2005 CL65 AMG
I ran 39psi in my CL65 when I took it road racing at VIR. I would only recommend lowering the pressure to drag race and not road race.
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