VDC tried to kill me!
05-28-2007, 02:04 PM
#22
Sounds like something went wrong somewhere.... but who knows what it was. I wasn't there so I'm not going to be so quick to jump on the "pilot error" bandwagon.
If he was in complete control... with little reason for the vdc to kick in... you would think it definitely should not have CAUSED loss of control even IF he was to blame... that's what it's supposed to help prevent...
Then again I don't have vdc or tcs(nor would I want either)... and in over 3 years of ***** to the wall driving(I've taken my fair share of sweepers at 130mph)... I've never once had any unexpected results from the car....
If the story is completely accurate... it definitely sounds weird to me...
halfway through the turn was probably the apex? were you going too fast and lifted off the throttle??
If he was in complete control... with little reason for the vdc to kick in... you would think it definitely should not have CAUSED loss of control even IF he was to blame... that's what it's supposed to help prevent...
Then again I don't have vdc or tcs(nor would I want either)... and in over 3 years of ***** to the wall driving(I've taken my fair share of sweepers at 130mph)... I've never once had any unexpected results from the car....
If the story is completely accurate... it definitely sounds weird to me...
halfway through the turn was probably the apex? were you going too fast and lifted off the throttle??
05-28-2007, 03:04 PM
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Once you break loose in a corner, the VDC will kick in, shouldn't happen before. At 80 it must have been a little exciting on a tight twisty. Lots of trees in BC.
05-28-2007, 03:07 PM
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Originally Posted by I1DER
Once you break loose in a corner, the VDC will kick in, shouldn't happen before. At 80 it must have been a little exciting on a tight twisty. Lots of trees in BC.
It was exciting. Because I was constantly driving with the beautiful sound of squeeling tires for hours in those tight twisties, I guess VDC had enough, lol. And nothing like feeling you're NOT in control of your car... and it's decided to drive for you.
VDC goes off from now on.
05-28-2007, 03:21 PM
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Originally Posted by Fluid1
Undecided
And I understand. Heck you don't know me, and my skillz... nor is this an occurance that happens regularily.
The fact of the matter is though, VDC thought something was wrong when there wasn't, and tried to "save me" by applying brakes and cutting fuel in the midst of a corner.
05-28-2007, 03:38 PM
#32
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I wonder if he knows the computer for VDC will know if a tire starts to slide before he knows.
05-28-2007, 03:43 PM
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Originally Posted by Tubbs
It was exciting. Because I was constantly driving with the beautiful sound of squeeling tires for hours in those tight twisties, I guess VDC had enough, lol. And nothing like feeling you're NOT in control of your car... and it's decided to drive for you.
VDC goes off from now on.
VDC goes off from now on.
Not to discredit you, but I notice VDC working in regular everyday driving.
Last edited by evolved326; 05-28-2007 at 03:47 PM.
05-28-2007, 04:09 PM
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Originally Posted by DavesZ#3
In your own words from your first post: "I got back in, scared shiatless, and "
after i got back in the car, yes.
05-28-2007, 04:10 PM
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Originally Posted by evolved326
MAybe VDC was off all the time? I take one corner and when i expect the tires to squeel and it doesnt, I know the VDC is working right away. You were driving in the twisties for hours with "with the beautiful sound of squeeling tires ". By the time the incident happened, how can you still say that you forgot to turn it off? You would have surely felt the difference. Glad that you are ok though.
Not to discredit you, but I notice VDC working in regular everyday driving.
Not to discredit you, but I notice VDC working in regular everyday driving.
Nope. slip light doesn't come on if VDC is off, nor do the brakes come on by themselves.
05-28-2007, 04:12 PM
#36
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Tubbs- Not arguing at all, but posting so that other readers don't mistakenly think VDC doesn't work. You described what happened, and I'll take your word for it (although your account does not match my experiences with VDC). You have slightly changed your account within your additional posts to your thread, so there is a minor loss of credibility.
My experiences with VDC have all been positive. I've only had it activate twice, and both times I was thankful I had the device helping me (prevented me from hitting the guard rail). BTW: I'm older so I was raised on RWD and know how to counter-steer and escape a skid.
When VDC activated (in my two experiences) I could hear and feel ABS working (as Dave also mentions) as VDC selected the wheel(s) requiring braking to straighten the car so it aligned with the front wheels. There was never the "when about half way through my rear brakes locked up" occurence you mention. It is essential that TCS is part of VDC because VDC activates braking under ABS control. If the driver kept applying power, VDC would not be able to contol the car. TCS to the rescue.
But the scenario you describe is different from what I believe VDC is designed for. I doubt that VDC was ever meant to be used when hitting tightening curves at 80 mph. So you're right on that point. When driving like you were (and I admit doing the same), my instinct is that VDC should be OFF. In the situation you describe, it is likely there would be some minor slippage. You may not notice it, but VDC will. VDC is far more sensitive than are your driver instincts and "feel." And, when VDC detects slippage, it goes to work. The first thing happening is TCS cutting power, and within a hundreth of a second, VDC begins applying braking to the appropriate wheel(s). The brakes (under ABS control) will not lock-up.
Possibly another Forum member can help here. The Question:
VDC is certainly intended for normal driving and speeds. But, is VDC also meant for high speed driving with rigorous maneuvers?
--Spike
My experiences with VDC have all been positive. I've only had it activate twice, and both times I was thankful I had the device helping me (prevented me from hitting the guard rail). BTW: I'm older so I was raised on RWD and know how to counter-steer and escape a skid.
When VDC activated (in my two experiences) I could hear and feel ABS working (as Dave also mentions) as VDC selected the wheel(s) requiring braking to straighten the car so it aligned with the front wheels. There was never the "when about half way through my rear brakes locked up" occurence you mention. It is essential that TCS is part of VDC because VDC activates braking under ABS control. If the driver kept applying power, VDC would not be able to contol the car. TCS to the rescue.
But the scenario you describe is different from what I believe VDC is designed for. I doubt that VDC was ever meant to be used when hitting tightening curves at 80 mph. So you're right on that point. When driving like you were (and I admit doing the same), my instinct is that VDC should be OFF. In the situation you describe, it is likely there would be some minor slippage. You may not notice it, but VDC will. VDC is far more sensitive than are your driver instincts and "feel." And, when VDC detects slippage, it goes to work. The first thing happening is TCS cutting power, and within a hundreth of a second, VDC begins applying braking to the appropriate wheel(s). The brakes (under ABS control) will not lock-up.
Possibly another Forum member can help here. The Question:
VDC is certainly intended for normal driving and speeds. But, is VDC also meant for high speed driving with rigorous maneuvers?
--Spike
05-28-2007, 04:13 PM
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Originally Posted by Tubbs
Nope. slip light doesn't come on if VDC is off, nor do the brakes come on by themselves.
05-28-2007, 04:20 PM
#38
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Originally Posted by Spike100
Tubbs- Not arguing at all, but posting so that other readers don't mistakenly think VDC doesn't work. You described what happened, and I'll take your word for it (although your account does not match my experiences with VDC). You have slightly changed your account within your additional posts to your thread, so there is a minor loss of credibility.
My experiences with VDC have all been positive. I've only had it activate twice, and both times I was thankful I had the device helping me (prevented me from hitting the guard rail). BTW: I'm older so I was raised on RWD and know how to counter-steer and escape a skid.
When VDC activated (in my two experiences) I could hear and feel ABS working (as Dave also mentions) as VDC selected the wheel(s) requiring braking to straighten the car so it aligned with the front wheels. There was never the "when about half way through my rear brakes locked up" occurence you mention. It is essential that TCS is part of VDC because VDC activates braking under ABS control. If the driver kept applying power, VDC would not be able to contol the car. TCS to the rescue.
But the scenario you describe is different from what I believe VDC is designed for. I doubt that VDC was ever meant to be used when hitting tightening curves at 80 mph. So you're right on that point. When driving like you were (and I admit doing the same), my instinct is that VDC should be OFF. In the situation you describe, it is likely there would be some minor slippage. You may not notice it, but VDC will. VDC is far more sensitive than are your driver instincts and "feel." And, when VDC detects slippage, it goes to work. The first thing happening is TCS cutting power, and within a hundreth of a second, VDC begins applying braking to the appropriate wheel(s). The brakes (under ABS control) will not lock-up.
Possibly another Forum member can help here. The Question:
VDC is certainly intended for normal driving and speeds. But, is VDC also meant for high speed driving with rigorous maneuvers?
--Spike
My experiences with VDC have all been positive. I've only had it activate twice, and both times I was thankful I had the device helping me (prevented me from hitting the guard rail). BTW: I'm older so I was raised on RWD and know how to counter-steer and escape a skid.
When VDC activated (in my two experiences) I could hear and feel ABS working (as Dave also mentions) as VDC selected the wheel(s) requiring braking to straighten the car so it aligned with the front wheels. There was never the "when about half way through my rear brakes locked up" occurence you mention. It is essential that TCS is part of VDC because VDC activates braking under ABS control. If the driver kept applying power, VDC would not be able to contol the car. TCS to the rescue.
But the scenario you describe is different from what I believe VDC is designed for. I doubt that VDC was ever meant to be used when hitting tightening curves at 80 mph. So you're right on that point. When driving like you were (and I admit doing the same), my instinct is that VDC should be OFF. In the situation you describe, it is likely there would be some minor slippage. You may not notice it, but VDC will. VDC is far more sensitive than are your driver instincts and "feel." And, when VDC detects slippage, it goes to work. The first thing happening is TCS cutting power, and within a hundreth of a second, VDC begins applying braking to the appropriate wheel(s). The brakes (under ABS control) will not lock-up.
Possibly another Forum member can help here. The Question:
VDC is certainly intended for normal driving and speeds. But, is VDC also meant for high speed driving with rigorous maneuvers?
--Spike
I don't think I've changed my story except when I said brakes locked up. They were "locked up" as much as much as ABS will allow.
I grew up with a 454 camaro, my 440 68 charger, an old AMC Javelin and a 340 70 Road runner. I also had a 91 talon tsi and my first car was a modded 88 daytona Shelby. I am familiar with many types of vehicles, most of which were more powerful than the 350.
There probably was a hint of slippage at the back, something which is easily controlled without electronics.
As for having VDC on, well sometimes you forget to turn it off. :/
05-28-2007, 04:21 PM
#39
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Originally Posted by evolved326
Sorry I am slow so bare with me. You accidently left VDC on. All that mad driving with tire squeeling and the VDC never kicked in. You hit a certain corner after hours of tire squeeling and this is when VDC finally goes crazy?
yes. and the corner was not unique, and my speed was well within reason (gf and her car-sick dog) were with me.
05-28-2007, 04:28 PM
#40
Originally Posted by Spike100
The Question:
VDC is certainly intended for normal driving and speeds. But, is VDC also meant for high speed driving with rigorous maneuvers?
--Spike
VDC is certainly intended for normal driving and speeds. But, is VDC also meant for high speed driving with rigorous maneuvers?
--Spike
If you go back to the original Nissan sales and promo material for 350Z, it certainly seemed like VDC was something for the track, i.e. spirited driving.
I've had it kick in twice on me, both times on a road course. Both times, it saved me from doing something stupid - going into a decreasing radius turn too fast and braking. Both times, the front brake(s) pulsed for a second.
I've accidently left it turned on during autocrossing and have been surprised that it didn't kick in. Then again, although the wheels were spinning and sliding, I was in control so I assume it saw no reason to stop me.