competition mode
Burning Brakes
Joined: Nov 2010
Posts: 783
Likes: 1
From: MONTGOMERY ALABAMA
It is a form of sophisticated traction control that electronically applies the brakes in modulation depending on road surface.It adds to an already active traction control. Some others may be able to explain it better.
Drifting
Joined: Oct 2007
Posts: 1,827
Likes: 5
From: Chino Hills CA
This is what the manual says:
Competitive Driving Mode
The driver can select this optional handling mode by
pressing the ACTIVE HANDLING button on the console
quickly two times. COMPETITIVE DRIVING MODE will
be displayed in the DIC. Competitive Driving Mode allows
the driver to have full control of the rear wheels while the
Active Handling System helps maintain directional control
of the vehicle by selective brake application. This involves
less intervention than with both the Active Handling
System and Traction Control Systems on. The Traction
Control System will not be operating. Adjust your driving
accordingly.
Kent
Competitive Driving Mode
The driver can select this optional handling mode by
pressing the ACTIVE HANDLING button on the console
quickly two times. COMPETITIVE DRIVING MODE will
be displayed in the DIC. Competitive Driving Mode allows
the driver to have full control of the rear wheels while the
Active Handling System helps maintain directional control
of the vehicle by selective brake application. This involves
less intervention than with both the Active Handling
System and Traction Control Systems on. The Traction
Control System will not be operating. Adjust your driving
accordingly.
Kent
Safety Car
Joined: Aug 2008
Posts: 4,344
Likes: 48
From: San Marcos CA
It lets you slide out a bit more and allows wheelspin before the fun **** cuts your engine torque and/or applies brakes. It's for the track, but still a safety net since most of us own our cars and still are trying not to crash.
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Verdad Gallardo
Safety Car
Joined: Nov 2006
Posts: 3,860
Likes: 5
From: Tampa FL
Le Mans Master
Joined: Jan 2006
Posts: 6,642
Likes: 450
From: Texarkana Texas
It gives added horsepower, less traction. The blower pops up and begins running, the headers are uncapped, and it raises the octane to 180. Shift points are changed to red line. Overall, it basically does nothing. Just my .02. 
Drifting
Joined: Jul 2010
Posts: 1,833
Likes: 257
From: Shawnee, OK
Crazy, but very funny ! 
My nickel - with 600hp, when I switch over to CM, it gets a little hairy romping second gear to third. The rear end breaks loose as I cross 100mph.
Pro
Joined: Jan 2010
Posts: 613
Likes: 1
From: Apache Junction AZ
It saved my butt once that I know of, I was driving north toward Phoenix when a sudden cloud burst opened up and I was passing a semi and all of a sudden all kinds of things were happening to my car and it slowed down and I was able to maintain control with the help of the active handling. I didn't realize it but was hydro-planing and was about to go around if I had active handling off.
Race Director
Joined: Jan 2006
Posts: 18,396
Likes: 169
1. I know how to drive my car.
2. I've heard some stories where the AH malfunctioned and put someone into a guard rail.
Pro
Joined: Oct 2004
Posts: 510
Likes: 5
From: Pipe Creek TX
For what's its worth -I've heard comments just like yours at track days; and they can't figure out why they're 2.5 seconds slower than me.
Burning Brakes
Joined: Oct 2006
Posts: 787
Likes: 127
From: Connecticut
Safety Car
Joined: Nov 2006
Posts: 3,860
Likes: 5
From: Tampa FL
I've seen guys with years of racing experience loose control. There is absolutely no valid reason to turn off the nannies on public roads.