She's acting up....

speedworks · 06-12-2010, 10:08 PM

No, I haven't done it in a parking lot. Usually I can do it on an off or on ramp, usually I have been in 3rd gear, 4-5k rpm. Make sure you have some experience at that speed in a turn - I usually scare my passenger

I can make it last through a turn, about 5 seconds, but then the off/on ramp straightens out and then it decelerates like normal.

Honestly, when it first happens, it will scare the crap out of you, if you are entering the turn at high speeds (which is the requirement). I usually enter the turns at high speed, lift to scrub some speed off, and hope to accelerate out, but with the stability control on and when I take my foot off the pedal, it continues to drive - real freaky and uncomfortable. But, now I just turn off the stab. control.

ChrisSlicks · 06-13-2010, 10:03 AM

Quote:

Originally Posted by speedworks

No, I haven't done it in a parking lot. Usually I can do it on an off or on ramp, usually I have been in 3rd gear, 4-5k rpm. Make sure you have some experience at that speed in a turn - I usually scare my passenger

I can make it last through a turn, about 5 seconds, but then the off/on ramp straightens out and then it decelerates like normal.

Honestly, when it first happens, it will scare the crap out of you, if you are entering the turn at high speeds (which is the requirement). I usually enter the turns at high speed, lift to scrub some speed off, and hope to accelerate out, but with the stability control on and when I take my foot off the pedal, it continues to drive - real freaky and uncomfortable. But, now I just turn off the stab. control.

Yes those are the exact symptoms I have experienced. I was carrying partial throttle in the turn but with slight deceleration to increase turn in. The car decided that the throttle should be enough to maintain constant speed which is not what I wanted because the corner tightens slightly. I ended up having way more speed at the end of the corner than I wanted which was a little dangerous, fortunately I left a little on the table and was able to safely negotiate the corner, but this safety feature can be dangerous. I would like to know which elements trigger the stability program to intervene like that.

speedworks · 06-13-2010, 01:03 PM

^^ yeah, I don't think it was well thought out. I think it would work great for a car that had serious weight transfer problems during throttle lift at high rpm, but I don't think this car has that problem. It will eventually make someone wreck because of their response to the unexpected continuous stability control throttle. Oh well, now that I know, I turn it off.

Premo34WV · 06-14-2010, 09:00 AM

I never noticed the connection between stability control and this problem. I always assumed it was an SRM problem. Makes sense i guess. I usually do turn the stability control off, but sometimes i forget to push that button before the urge to push the car a bit. Ill pay attention to see if i can duplicate it with the stability control on and off.

Thanks for the updates.

LunaZ · 06-14-2010, 09:39 PM

Quote:

Originally Posted by Volcom370Z

Just want to verify so I can try and replicate... high speed freeway exit (roundabout or what?) and downshift to a gear that will give me 4-5k of RPM, and let off the gas? This should cause me to keep accelerating or just get no engine braking?

Quote:

Originally Posted by speedworks

Honestly, when it first happens, it will scare the crap out of you, if you are entering the turn at high speeds (which is the requirement). I usually enter the turns at high speed, lift to scrub some speed off, and hope to accelerate out, but with the stability control on and when I take my foot off the pedal, it continues to drive - real freaky and uncomfortable. But, now I just turn off the stab. control.

Quote:

Originally Posted by ChrisSlicks

Yes those are the exact symptoms I have experienced. I was carrying partial throttle in the turn but with slight deceleration to increase turn in. The car decided that the throttle should be enough to maintain constant speed which is not what I wanted because the corner tightens slightly. I ended up having way more speed at the end of the corner than I wanted which was a little dangerous, fortunately I left a little on the table and was able to safely negotiate the corner, but this safety feature can be dangerous. I would like to know which elements trigger the stability program to intervene like that.

Well, after reading this thread on Sunday morning, I experienced the exact thing you are describing in a fast, constant radius ramp where I downshifted from 6th to 5th and then 4th.
If it wasn't for this thread, would have been a bit unnerved seeing as I wasn't trying to recreate the scenario you've been describing and my car was hurtling towards slower moving traffic on the ramp. Instead I kind of chuckled and said to myself "how 'bout that?"
Another reason to turn the VDC off, I guess.

06-12-2010, 10:08 PM	#1 (permalink)
speedworks Track Member Join Date: Jan 2009 Location: Boston, MA Posts: 550 Drives: PW purchased 01/09 Rep Power: 19	No, I haven't done it in a parking lot. Usually I can do it on an off or on ramp, usually I have been in 3rd gear, 4-5k rpm. Make sure you have some experience at that speed in a turn - I usually scare my passenger I can make it last through a turn, about 5 seconds, but then the off/on ramp straightens out and then it decelerates like normal. Honestly, when it first happens, it will scare the crap out of you, if you are entering the turn at high speeds (which is the requirement). I usually enter the turns at high speed, lift to scrub some speed off, and hope to accelerate out, but with the stability control on and when I take my foot off the pedal, it continues to drive - real freaky and uncomfortable. But, now I just turn off the stab. control.

06-13-2010, 01:03 PM	#3 (permalink)
speedworks Track Member Join Date: Jan 2009 Location: Boston, MA Posts: 550 Drives: PW purchased 01/09 Rep Power: 19	^^ yeah, I don't think it was well thought out. I think it would work great for a car that had serious weight transfer problems during throttle lift at high rpm, but I don't think this car has that problem. It will eventually make someone wreck because of their response to the unexpected continuous stability control throttle. Oh well, now that I know, I turn it off.

06-14-2010, 09:00 AM	#4 (permalink)
Premo34WV Base Member Join Date: Jun 2009 Location: Morgantown, W.Virginia Posts: 68 Drives: PW '09 370z Sp. 6mt Rep Power: 17	I never noticed the connection between stability control and this problem. I always assumed it was an SRM problem. Makes sense i guess. I usually do turn the stability control off, but sometimes i forget to push that button before the urge to push the car a bit. Ill pay attention to see if i can duplicate it with the stability control on and off. Thanks for the updates.