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What exactly does VDC do ??

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Old 09-17-2007, 07:50 PM
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Brakes What exactly does VDC do ??

While pushing a curvy road last weekend I encountered a deer running at an intercepting angle,a quick move to the right put the r/r tire maybe 1/3rd off the road,the rest is history..doing three quick 180's I ran out of road into the ditch.Eachtime I was sideways it seemed faster and more pronounced I'm not placeing blame on the car as .until this point has had impeccable road manners but...doesn't the VDC correct after the rear goes out 10 degrees?Or as I've concluded loss of traction= loss of control no matter what switch you have on ..?
After just 5100 I thought I was getting to know the road manners of my G .I guess I'lhave to start a new "Learning Curve" when I get it back from the shop Has any one else experienced a very fast avoidance move and have the car 'wash out":
 
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Old 09-17-2007, 08:26 PM
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Whoa, that's crazy.

Sorry but I havent' had any "wash outs" or anything.

I even tried accelerating really hard on a wet turn and VDC helped me a lot.
 
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Old 09-17-2007, 08:27 PM
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Oh btw, sorry to hear that.
 
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Old 09-17-2007, 08:50 PM
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sorry to hear that. was there a lot of damage? i think the vdc is supposed to sense skidding, cut gas and individually apply brakes to any of the 4 wheels to help it steer quickly. not sure how much speed u were pushing or how u counter steered, but the factory tires don't hold a lot of grip to begin with.
 
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Old 09-17-2007, 09:28 PM
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VDC will indeed stop the car from slewing / yawing, but there's a limit. It sounds like you went off the road and into a spin (not surprising, given the difference in traction / road edge etc.), and VDC has limits to what it can correct.

VDC has stopped some pretty significant yaws for me, but if the car spins fast enough, it gets overrun.

And to answer your question, it senses differences in wheel speeds, and starts applying cutting power and braking individual wheels to bring the car back in line.

Sorry that happened.
 

Last edited by G35Now!; 09-17-2007 at 09:31 PM.
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Old 09-18-2007, 07:56 PM
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Originally Posted by G35Now!
VDC has stopped some pretty significant yaws for me, but if the car spins fast enough, it gets overrun.

And to answer your question, it senses differences in wheel speeds, and starts applying cutting power and braking individual wheels to bring the car back in line.

Sorry that happened.
Indeed. No LSD, VDC, ABS, tires or any other electronic/mechanical system on cars can overcome the laws of physics.
 
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Old 09-18-2007, 09:20 PM
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Wow Jeff, that sounds like a scary experience, the main thing is no one got hurt, was there much damage to your G?

I had to swerve off the road at a high rate of speed last year when I guy cut me off, I was doing +70 mph. I steered onto the shoulder and partly into a ditch and back out before I got stopped and I was amazed at how well the X behaved.

Good luck with the fix Jeff.
 
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Old 09-19-2007, 09:16 AM
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Someone get that crap off of here...

Sorry to hear about the G btw. As far as my driving goes, VDC will help you a lot to prevent getting squirly, but when you do, it's not magic, and can't correct for you. If you try hard enough, you can turn the car in circles regardless of what you (or the car) do/es at the controls. So far as I know it only combats wheel spin and throttle.
 
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Old 09-19-2007, 07:33 PM
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the first thing I do when I get in is disable the VDC. Not just because I drive like a bat out of hell, but its almost gotten me into a few wrecks.
 
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Old 09-19-2007, 08:14 PM
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Sounds similar to something that happened to me last February. The one time I've lost control in the G, my back end slid out in the rain going about 40 MPH, and the car went into what I'd call oscillations with exponentially increasing amplitude - basically it went completely out of control and fishtailed back and forth, each time going faster and further (laterally). It still bothers me to this day, because I've never seen anything like it. I used to drive a 93 mustang in 6 inches of snow with ease, so I know how to steer into a skid. At that speed and acceleration, the counter moves I did should have made an impact, it's almost like the computer was counteracting my counteractions.
 

Last edited by aero; 09-19-2007 at 08:16 PM.
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Old 09-19-2007, 08:28 PM
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VDC... All I know is that it's makes me go slower when I'm racing.

But now I need a smoke. Thanks Banned guy!
 
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Old 09-22-2007, 05:37 AM
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Originally Posted by GWord256
VDC... All I know is that it's makes me go slower when I'm racing.

But now I need a smoke. Thanks Banned guy!
i second that. then again a kinda nifty feature my friend has an IS250 and uses his VDC when in traffic.
 
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