I saw an LSD kit somewhere for around $1000....

ttrank: any thoughts on this one? you've got to have done something about this....

 

Why would you want it off?? Just asking

 

VDC will also apply brakes to assist steering in a skid. Make a right turn with understeer and braking force will be applied to the right side of the vehicle to assist with the turn, getting you back on track. Right hand turn with OVERsteer will apply braking force to the left side of the vehicle. This is the basic setup banned from F1 racing, although quite primitive, respectfully. If only the G didn't cut throttle during this recovery procedure... we could be potentially deadly on the track!

Especially with forced induction applications, VDC activates quite often - due to wheel slip / loss of traction. The biggest performance fault occurs when VDC is activated and the throttle is cut. Driving performance on the track, drag-strip, or street is hindered due to the slow recovery of VDC, with close to 1 second before it gives control of the throttle back to the driver. With high sensitivity and triggered by the slightest wheel slip, the drivability of the car is largely compromised when pushing the limits of traction. Therefore, it's nice to have it automatically turn off...

A better example would be in relation to ABS (especially older systems). The argument is that a skilled driver (anyone not surprised), can stop a vehicle faster/shorter-distance without ABS than with ABS. Beter yet; A human has more finess than a computer. Manufactures install ABS to increase the safety to the masses, at a small compromise to few. Ditto on the VDC...


I would like to see a design with 3 VDC settings: 1) VDC on/off relative to speed (turns on over 45mph), 2) OFF 3) ON...

 

The VDC system uses a Brake Limited Slip Differential (LSD) system to improve vehicle traction. The brake LSD system works when one of the driving wheels is spinning on a slippery surface. The brake LSD system brakes the spinning wheel which distributes the driving power to the other drive wheel. If the vehicle is operated with the vehicle dynamics control system turned off, all VDC and TCS
functions will be turned off. The brake LSD system and ABS will still operate with the VDC system off. If the brake LSD system or the ABS is activated, the slip indicator light will blink and you may hear a clunk noise and/or feel a pulsation in the brake pedal. This is normal.

2003 G35 owners manual

 

So with VDC off, more power would spin both tires?

 

"So with VDC off, more power would spin both tires?"

well yeah cuz with an LSD as one wheel starts spinning and you hit the gas the diff mechanism locks the other wheel and they both spin to gain traction