SgtGoldy

iTrader: (6)

I purchased some Volk CE28Ns with 285/35/19 rear and 245/40/19 front. Is the size of my tires messing with the vdc? If so what tire size can i go with to remedy the situation?

blnewt

iTrader: (13)

Tire diameters are well within the 3% range, the worst case w/ your set is only .9% off. Is your VDC light on all the time or are you saying it's triggered more often than before?
If it just seems more sensitive when you're pushing the revs it could be your tires are a harder compound providing less grip.
It's definitely not your tire diameters causing the issue.

SgtGoldy

iTrader: (6)

Its coming on around 3rd and 4th gear. When i let off it goes away.

blnewt

iTrader: (13)

I entered the oem S coupe tire sizes in the tire calculator compared to your new tires and everything seems fine in that regard. Just to be sure were you currently running
225/45WR19
245/40WR19
If so, something else is going on

SgtGoldy

iTrader: (6)

I had 245 up front with 265 in the rear =/

Robert_K

iTrader: (1)

Drive with VDC off. Problem fixed. Can't believe people are driving with it on. It drives me up a wall when I forget to turn it off. I have it completely disable on my 350Z.

Rad_Slinger

iTrader: (12)

It's not just size that matters for the VDC, it's weight as well....either reduction or added weight can set it off. I have also learned that adjusting a rear aftermarket sway bar to the stiffest setting will trigger the VDC quite a bit....why I have no idea, but when I changed it back to the middle setting the VDC doesn't even come on in the rain.

Rob has stated a fix that would solve the problem. Could always try changing the tire setup next time you need tires.

Wish Infiniti would just do away with the VDC, or make it so there's a switch to turn it on when wanted.

Robert_K

iTrader: (1)

Weight of a wheel/tire and sway bars have ZERO influence on VDC. VDC is controlled by the vehicle's speed/wheel sensors and a module usually mounted in the center console to detect yaw. Since yaw is not a factor here we can rule that out.

Since new wheels/tires have been mounted it is possible that the rotation of the new set-up is spinning faster or slower than the parameters set in the ECU.

Rad_Slinger

iTrader: (12)

I was speaking from personal expierence in regards to the saw bar. I realize the it has nothing to do with the vdc, but apparently the stiff setting on the sway bar was making my tires break loose all the time.

In regards to the wheel weight causing the vdc to activate, this came straight from the mouth of an Infiniti master tech when making idle conversation about wheels a few weeks ago....just what he said.

Sgtgoldy, did a little research for you. Apparently a faulty ABS wheel speed sensor can cause the VDC to activate frequently. There have been a bunch of documented problems I found where that was the cause.

Robert_K

iTrader: (1)

Your sway-bar doesn't make your wheels break loose as it decreases body roll. Now if your tire is spinning because it is up in the air while taking a turn at a very aggressive speed, like on an auto-x or HPDE track, I can understand. But than why are you driving with VDC on driving that aggressively?

And you "Master Tech" is wrong. I also have attended Nissan/Infiniti training and wheel weight cannot effect the the sensor. Now if he is trying to say that do the a light wheel/tire combo it doesn't take as much power to spin the wheels that is true. But for the instance in the OP first post, weight has no factor.

Again... Turn VDC off and you won't have these problems.