C32 AMG, C55 AMG (W203) 2001 - 2007

Cornering Question

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Old Oct 8, 2007 | 03:12 PM
  #1  
edogger's Avatar
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From: NYC
2005 C55 with Nav
Cornering Question

C55ers

I have a 2005 C55 all with original factory equipment. Sometimes when I push it (60mph+) as its going around a corner I feel it slipping and not sticking to the road as much as I'd like it to

Anything I can do to tighten it up?

Do you guys feel the same thing?

Shouldn't the 18inchers do the trick?

Looking forward to everyone's thoughts and comments
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Old Oct 8, 2007 | 03:35 PM
  #2  
Bif powell's Avatar
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2002 c32
Tires? Is the whole car letting loose, or just the front (it's pushing instead of turning)?

Heavier duty sway bars might help in general.
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Old Oct 8, 2007 | 04:12 PM
  #3  
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C55
what tires are you using now and what are your air pressures front and rear?
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Old Oct 9, 2007 | 10:44 AM
  #4  
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C32 AMG
Originally Posted by edogger
C55ers

I have a 2005 C55 all with original factory equipment. Sometimes when I push it (60mph+) as its going around a corner I feel it slipping and not sticking to the road as much as I'd like it to

Anything I can do to tighten it up?

Do you guys feel the same thing?

Shouldn't the 18inchers do the trick?

Looking forward to everyone's thoughts and comments
Slow down?


Size of the wheel will not make a difference. It's all about the tires. If you use all-season tires, they'll grip less than summer tires.

At the limit, the C55 will understeer. It's a safety issue.
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Old Oct 9, 2007 | 01:38 PM
  #5  
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From: NYC
2005 C55 with Nav
Originally Posted by fivepointfivev8
what tires are you using now and what are your air pressures front and rear?
the factory P Zero rosso 225 40 ZR 18 -- no new tires yet (13K miles on the car)

Is there something better? Should I switch it up?

I also increased the PSI on the tires by a few since that's the recomendation for high speed driving
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Old Oct 9, 2007 | 01:40 PM
  #6  
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From: NYC
2005 C55 with Nav
Originally Posted by Bif powell
Tires? Is the whole car letting loose, or just the front (it's pushing instead of turning)?

Heavier duty sway bars might help in general.
whole car is not letting loose its just sliding a bit around the croner --not holding the road as much as I'd want
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Old Oct 9, 2007 | 01:56 PM
  #7  
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C32 AMG
Originally Posted by edogger
whole car is not letting loose its just sliding a bit around the croner --not holding the road as much as I'd want
Sounds like you're just reaching the limit of the tires, assuming inflation is in the ballpark. You can lose grip by underinflating and overinflating. For street use, go a few pounds over the recommended inflation.

Those are good quality tires, and at 13K should be in their prime. It would be silly to toss those tires now. Maybe pick up a used Miata as a "going around the corner fast" car?
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Old Oct 9, 2007 | 08:30 PM
  #8  
PC Valkyrie's Avatar
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From: Canada
C55 AMG, 135i, 911 GT3, GLE43 AMG
Originally Posted by edogger
C55ers

I have a 2005 C55 all with original factory equipment. Sometimes when I push it (60mph+) as its going around a corner I feel it slipping and not sticking to the road as much as I'd like it to

Anything I can do to tighten it up?

Do you guys feel the same thing?

Shouldn't the 18inchers do the trick?

Looking forward to everyone's thoughts and comments
If you're negotiating a 90 degree turn at 60+mph (which is 96+km/h in my part of the world), you are exceeding the grip of the tires on a stock C55. On a track, the fastest I can negotiate a 90 degree turn with a stock C55 setup is about 85-90km/h, and that's at the limit with tires screeching, but with no obvious understeering or sliding yet...and that's driving on a racing line around a curve, which you cannot really do on everyday roads.

Just slow down, approach the turn slower and apply progressively more throttle gradually after you turn in. You'll end up covering the entire turn faster than if you were on the absolute limit through the entire turn when you cannot apply any throttle until you're straight again. You're not driving a go-kart.

The best way to get more cornering grip is to get sticker tires.
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