VDC off???

Q8y_drifter · 08-23-2010, 05:09 PM

Quote:

Originally Posted by ChrisSlicks

2nd is the ABS itself that works in conjunction with the stability control. Touching the brake has a tendency to "straighten" the car out. I think you would have to pull the ABS fuse to correct this.

Yup that's exactly the issue here. Even with my foot off the throttle, mid way through a drift if I wanted to slow down, pressing the brakes even lightly would straighten the car out, as if the VDC was switched on again.

Does removing the ABS fuse disable the Bosch yaw sensor? I really don't wanna take off the center console all the time.

ChrisSlicks · 08-23-2010, 07:06 PM

Quote:

Originally Posted by Q8y_drifter

Does removing the ABS fuse disable the Bosch yaw sensor? I really don't wanna take off the center console all the time.

It does, but the car has a natural rear bias in the braking system so without ABS you will easily lock up the rear brakes. You would have to find super wimpy pads to put in the rear.

cossie1600 · 08-23-2010, 09:02 PM

Quote:

Originally Posted by ChrisSlicks

There are 2 issues at play in your above description.

1st is the brake/throttle interlock. This car cuts throttle input if you touch the brake. The stop lamp fuse should address this.

2nd is the ABS itself that works in conjunction with the stability control. Touching the brake has a tendency to "straighten" the car out. I think you would have to pull the ABS fuse to correct this.

are you sure the car will straighten itself out with the vdc off? with vdc off, only the abs and abls work. abls doesnt really stop your drift, it just limit wheel spins. no?

ChrisSlicks · 08-23-2010, 09:44 PM

Quote:

Originally Posted by cossie1600

are you sure the car will straighten itself out with the vdc off? with vdc off, only the abs and abls work. abls doesnt really stop your drift, it just limit wheel spins. no?

Well if you are at a 45 degree angle I don't know what it will do but at lesser angles yes it does seem to. Perhaps not as a result of any stability program but rather stopping all wheel spin will return grip. It seems to apply the brakes intelligently in corners even with VDC off in that you can brake as hard as you want and it will never upset the car.

cossie1600 · 08-23-2010, 12:45 PM

The stop lamp thing limits power output regardless of traction. ABLS is a semi traction control. I guess it makes sense why this car doesn't do the single wheel burn out off fast corners

cossie1600 · 08-23-2010, 10:30 PM

If I understand how the ABLS work correctly, it seems to me that it only apply brakes to the REAR to limit wheelspin under power. If you go into the corner at 80mph and jerk the wheel to one side, I am not sure if the brakes will actually kick in to slow you down or straighten it out.

When you apply brakes while the car is sideway, I think it is the EBD that steps in to apply brakes at the correct corner. It is not the actual VDC

ChrisSlicks · 08-23-2010, 10:42 PM

That may be true but regardless it is distributing the brake force intelligently using the same input data as the VDC receives.

Q8y_drifter · 08-23-2010, 11:12 PM

Even if it was the EBD that is engaging the brakes, it is still helping straighten the car out. Why else would it apply brakes at a specific corner other than to stabilize the car?

cossie1600 · 08-23-2010, 11:31 PM

That's what it is suppose to, part of drivers' aid.

I will pay more attention to it when I take it to the track this Friday. From my autox experience, I only see the light flashing from time to time. I honestly don't think it does anything for me, but then the lot we run are so pathetic that we rarely see over 55mph

Q8y_drifter · 08-24-2010, 12:44 AM

Yeah and that's why I'm trying to figure out what's needed to shut this feature off and just let it brake normally during a drift.

cossie1600 · 08-24-2010, 07:59 AM

Disable the ABS and you should be able to take care of the issue.

Or don't drift and drive straight?

cossie1600 · 08-30-2010, 08:05 PM

ABLS never kicked on at track, I think the LSD does a decent enough job to not let the car do a one leg burnout. It seems like the problem is more autox related where you are in the lower gears. You can't disable ABS by pulling a fuse, they are wired together with bunch of other stuff.

ChrisSlicks · 08-31-2010, 07:30 AM

Quote:

Originally Posted by cossie1600

ABLS never kicked on at track, I think the LSD does a decent enough job to not let the car do a one leg burnout. It seems like the problem is more autox related where you are in the lower gears. You can't disable ABS by pulling a fuse, they are wired together with bunch of other stuff.

ABS has it's own fuse but the fuse module also has the VVEL and Power Windows. You can get a replacement fuse module and then just cut the ABS fuse in the module.

cossie1600 · 08-31-2010, 08:08 AM

Quote:

Originally Posted by ChrisSlicks

ABS has it's own fuse but the fuse module also has the VVEL and Power Windows. You can get a replacement fuse module and then just cut the ABS fuse in the module.

I had ice mode/ABS problem at bumpy corners, but it's a lot better on smoother surfaces. I really thought about disabling the ABS at first, but I am not sure if modern cars really like that idea.

On a separate note, you can see how the VDC flash like a xmas tree no matter what I was doing at the track. The system is annoying on the Nissan, way too intrusive. My Prius has a nice stability control system

YouTube - 0810 VIR 370z lap with VDC on

ChrisSlicks · 08-31-2010, 08:46 AM

Yeah, I did my first morning track session Saturday with VDC on. No matter how smooth I tried to be it just wouldn't let you accelerate out of a corner at all despite there being lots of available grip. VDC off and the car was great. Surprisingly the VLSD held up okay and I was able to rotate the car with the throttle.

08-23-2010, 10:42 PM	#7 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 654	That may be true but regardless it is distributing the brake force intelligently using the same input data as the VDC receives. __________________ Hotchkis ARB \| Stillen CAI \| Art Pipes \| Berk CBE \| Stillen AP Racing Brakes \| AE Performance Oil Cooler \| BC Racing ER Coilovers \| Doran Control Arms

08-23-2010, 11:12 PM	#8 (permalink)
Q8y_drifter Enthusiast Member Join Date: Mar 2010 Location: Kuwait Posts: 306 Drives: 08 Infiniti G35 5AT Rep Power: 16	Even if it was the EBD that is engaging the brakes, it is still helping straighten the car out. Why else would it apply brakes at a specific corner other than to stabilize the car? __________________ 08 G35 5AT Sedan \| Stillen CBE \| Invidia HFC \| Injen CAI \| Uprev Tune \| Akebono BBK \| Tanabe Coilovers \| Hotchkis Sway Bars \| GTSpec FSB \| Black Headlights & Grille \| Volk GT-F Wheels \| Hankook V12 Evo Tires

08-24-2010, 12:44 AM	#10 (permalink)
Q8y_drifter Enthusiast Member Join Date: Mar 2010 Location: Kuwait Posts: 306 Drives: 08 Infiniti G35 5AT Rep Power: 16	Yeah and that's why I'm trying to figure out what's needed to shut this feature off and just let it brake normally during a drift. __________________ 08 G35 5AT Sedan \| Stillen CBE \| Invidia HFC \| Injen CAI \| Uprev Tune \| Akebono BBK \| Tanabe Coilovers \| Hotchkis Sway Bars \| GTSpec FSB \| Black Headlights & Grille \| Volk GT-F Wheels \| Hankook V12 Evo Tires

08-31-2010, 08:46 AM	#15 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 654	Yeah, I did my first morning track session Saturday with VDC on. No matter how smooth I tried to be it just wouldn't let you accelerate out of a corner at all despite there being lots of available grip. VDC off and the car was great. Surprisingly the VLSD held up okay and I was able to rotate the car with the throttle. __________________ Hotchkis ARB \| Stillen CAI \| Art Pipes \| Berk CBE \| Stillen AP Racing Brakes \| AE Performance Oil Cooler \| BC Racing ER Coilovers \| Doran Control Arms

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08-23-2010, 12:45 PM	#5 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	The stop lamp thing limits power output regardless of traction. ABLS is a semi traction control. I guess it makes sense why this car doesn't do the single wheel burn out off fast corners

08-23-2010, 10:30 PM	#6 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	If I understand how the ABLS work correctly, it seems to me that it only apply brakes to the REAR to limit wheelspin under power. If you go into the corner at 80mph and jerk the wheel to one side, I am not sure if the brakes will actually kick in to slow you down or straighten it out. When you apply brakes while the car is sideway, I think it is the EBD that steps in to apply brakes at the correct corner. It is not the actual VDC

08-23-2010, 11:31 PM	#9 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	That's what it is suppose to, part of drivers' aid. I will pay more attention to it when I take it to the track this Friday. From my autox experience, I only see the light flashing from time to time. I honestly don't think it does anything for me, but then the lot we run are so pathetic that we rarely see over 55mph

08-24-2010, 07:59 AM	#11 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	Disable the ABS and you should be able to take care of the issue. Or don't drift and drive straight?

08-30-2010, 08:05 PM	#12 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	ABLS never kicked on at track, I think the LSD does a decent enough job to not let the car do a one leg burnout. It seems like the problem is more autox related where you are in the lower gears. You can't disable ABS by pulling a fuse, they are wired together with bunch of other stuff.