Can any tuners disable TC/VDC?

[himbo]

Originally Posted by wparsons

^^ Wrong, wrong, wrong. The ONLY thing that the pedal dance disables that turning the TC/VSC off doesn't do is the EBFD.

If you properly disabled TC/VSC and you're still getting brakes applied it's because you have zero traction on one wheel and the EBFD is applying a touch of brake stop the diff from unloading power to the wheel with zero traction.

Hmmmmmm guess that would explain it. But, TC/VSC re-engages above 31mph -even if you push the TC button for 3 seconds.. right?

[wparsons]

Originally Posted by himbo

Hmmmmmm guess that would explain it. But, TC/VSC re-engages above 31mph -even if you push the TC button for 3 seconds.. right?

Nope. If the TC turns back on at ~30mph then it wasn't fully disabled.

I've hit over 140km/h (smaller track) with it properly disabled by the button (no pedal dance) and slid around without it coming back on.

The only difference between fully disabling it (~5 seconds of holding the button) and the pedal dance is that EBFD is still on if you use the button. ABS is on in both cases, normal TC and VSC are off.

[Turdinator]

The pedal dance also turns off the virtual lsd (where a spinning wheel is braked to keep traction) whereas the 3 sec hold doesn't disable that. Not sure if that's good or bad in the snow.

[Boofneenee]

Originally Posted by Ryan86

Really really

We do this while on the dyno. Take note when you activate again the TC light may stay on for a few 100 meters and then go off.

just tried it out today and it works!! woohooo.. now all i need are my summer tires back on my car so I can slide this mo fo around in circles

[Seattle944t]

Originally Posted by himbo

Hmmmmmm guess that would explain it. But, TC/VSC re-engages above 31mph -even if you push the TC button for 3 seconds.. right?

No, that's exactly what happens when you hold the button for a short time, less than three seconds. This clearly stated in the manual that less than three seconds only turns off trac below 30MPH and will reengage @ 31 MPH (pg 203 of the Scion Manual).

So, as has been mentioned before you are holding it wrong. Hold it down longer. You should see both lights go active when you have completely turned it off - the TRAC off light, and the Car slip light below it will both be active. If you only briefly press the Trac off button only the TRAC off light will be on and the system will start up again @31 MPH.

[himbo]

That's what I have been doing but I guess it was the EBFD that was kicking in. Strange, there were time line it seemed like it was still on...

[wparsons]

If you hold the button long enough, the lights come on while the button is still pressed. If you have to let go of the button for the light to come on you didn't hold long enough.

Not sure if it varies from car to car, but mine is definitely longer than 3 seconds.

[SkullWorks]

Originally Posted by wparsons

*sigh*... link to said threads? How are most posts contradictory?

Are you talking about it going into "ice mode" and locking up the rear brakes? That's the EBFD at work.

EBFD is Electronic Brake Force Distribution. If your foot isn't on the brake, it isn't coming into play at all. If you're coasting or on the gas it has no effect. Now if you're trying to trail brake too much or are running staggered pad compounds you might have issues, but ONLY under braking.

Sounds like you're the one that isn't well informed.

You are stating that all Nannies are disabled, yet explaining that they in-fact aren't all disengaged, there is alot going on behind the scenes with a traction control as advanced as this. so based on steering angle and throttle position different amounts of the system will step in to save your ass.

I have been tracking the car for over a year and have ample time driving it in all of it's various modes as do many members on this forum, if you ask @csg_mike I'm sure he can enlighten you even further

[turbos86]

Originally Posted by himbo

if it was possible to "tune" the pedal dance at the press of a button.

Ask and you shall receive.
http://www.autofactory.jp/product/to...&cate=4&seq=11

[himbo]

Originally Posted by turbos86

Ask and you shall receive.
http://www.autofactory.jp/product/to...&cate=4&seq=11

Holy crap! How did you find this thing!?!? I'll have to see how we can get this stateside.

I still believe there's something lurking when the system is"off". A lot of track guys have talked about this. I will find the links

[wparsons]

Originally Posted by SkullWorks

You are stating that all Nannies are disabled, yet explaining that they in-fact aren't all disengaged, there is alot going on behind the scenes with a traction control as advanced as this. so based on steering angle and throttle position different amounts of the system will step in to save your ass.

I have been tracking the car for over a year and have ample time driving it in all of it's various modes as do many members on this forum, if you ask @csg_mike I'm sure he can enlighten you even further

You should go re-read the thread... every post of mine has stated the same thing about the TC/VSC/EBFD.

Holding the TC button turns off everything except EBFD and ABS, doing the pedal dance turns off everything except ABS.

As for what you've said, how does EBFD stop you from spinning???

[stugray]

Originally Posted by wparsons

As for what you've said, how does EBFD stop you from spinning???

If you do not have EBFD enabled, then you are depending on the mechanical brake bias distribution.
Did the engineer design the car to have less rear braking than the front in this situation (as they should have)? I dont know.

Older cars have a proportioning valve that cuts off the rear brakes at a certain pressure and allows the front pressure to continue to climb.
This reduces the chance of the rears locking before the fronts (which causes a spin)

Without EBFD enabled, who knows wht the rear brake bias is.

[wparsons]

You're kidding right? I already said that EBFD doesn't come into play except under braking and you still said that it would prevent a spin.

Unless you're messing with pad compounds or trail braking hard you have no worries about EBFD doing anything while on a track.

In addition, if you're driving like that with EBFD on then it's very likely it'll fall into ice mode and fully lock up the rear brakes.

[stugray]

"and you still said that it would prevent a spin"

"I" didnt say anything of the sort.
I was merely commenting on the statement "how does EBFD stop you from spinning???".

My answer was that EBFD is now the replacement for a rear brake proportioning valve.
The car does not have a proportioning valve, so with EBFD disabled, the rear brake bias is unknown.
If it is wrong (more bias to the rear than the front), then you could spin under braking conditions.

Sorry if I was commenting on a statement without considering the context of the discussion with SkullWorks.