Has anyone successfully been able to disable the stupid function where hitting the brake & gas pedals together cuts fuel to the engine ?

It pisses me off cause I can't:

A) Heel & Toe
B) Brake boost !@#!

ARGH.

Anyone ?

 

Hmm.. I dont have this problem. I have an 03 Enthusiast and disable my TCS. I heel toe with no problems. Maybe the VDC in higher model cars does this, I hate unnecessary technology. :/

 

I have an 03 Peformance and I don't have that problem downshifting. I rev match w/ no fuel cut.

 

here's what i did; i tapped the red/yellow brake signal wire before it connects to the brake pedal (there are two connectors; brown & white). the white connector contains the red/yellow wire so as i said i tapped it and connected this to a push button switch. then i ran the switch to the blank switch next to the tcs button, and installed it there. and voila, instant burnouts!!!
https://my350z.com/forum/attachment....chmentid=23526
here's a second pic. this is the switch i used (picked it up at lowes actually).
https://my350z.com/forum/attachment....chmentid=23527
and a final pic of the switch installed. sorry its a little out of focus, i took the pics right after the install and was in a hurry to try it out.
https://my350z.com/forum/attachment....chmentid=23528

 

I seem to recall Raceboy saying that he still had throttle while doing heavy braking heel-toes, but only like 1/3 as much as he should. So he could still blip on a heel-toe, but it was like being in slow motion. I've noticed this too. My blips rise faster if I'm not braking heavily (or not braking at all).

I remember someone coming up with an electronic schematic for overriding this. I think the brake lights would still work too, if I remember correctly. The problem is that the Z will go into safe/limp mode if it doesn't see the brake pedal pressed after a certain amount of time while driving.

I was thinking a good approach would be to do the same circuit (if I could find it again), but have a switch on the clutch. If the clutch is pressed, then don't pass the brake info to the ECU. Not sure how all this affects anti-lock and VDC though.
--
Jeff

 

I believe initially people were pulling a certain fuse to accomplish this. It worked great for a while, but eventually safe mode would kick in, just like you said. At that point they'd put the fuse back in, the pull it.

As far as heel-toeing, I've never had a problem doing it. Maybe I've just learned to work with it? With my lightened flywheel I already find myself sometimes revving a bit too high during a heel-toe downshift, so I can't really see a need to be able to do so faster. And I can't do big burnouts, regardless, because I get big wheel hop and that would result in big broken axles. <sigh>

 

This is interesting... but are you not risking having your brakes go out on you through this extra wiring ? Especially when you might need them the most (after a burnout?)

 

you dont lose the ability to use the brakes. it just disables throttle cut-off. however, the brake lights dont work during the burnout. it's the same as pulling the brake fuse without having to access the fuse-box everytime.

 

Cool, thanks aj.

 

My 04 doesn't have this. I step on brake and gas and instant burnout.

 

Lucky bastard.

 

Really? All 350Zs have the throttle reduction system during braking. Hmm... do you have a base or enthusiast model? I don't think that would make a difference, but I guess it might since they have a different traction control system than the other models.

But it could also be that, even with the throttle reduced, you're still getting enough power to do a burn out. It doesn't cut your throttle completely when you step on the brakes. It just reduces throttle. Here's how you can see if you car does this:

Get on the freeway or some other long straight with no traffic around you. While cruising down the road in 6th, give it full throttle and hold it. Then, with your left foot, slowly press in the brake pedal. At some point, before the brakes actually grab, it'll activate the throttle reduction. You'll feel your car stop pulling quite so much. If you then let off the brake pedal slowly, you'll feel the power suddenly come back in. It's like a switch, and you feel it turn on and off as you press the brake pedal in and out. It doesn't take much brake pedal action to engage it. Just a little. About the time your brake lights come on, I imagine.

 

Mine is an Auto touring model. I'll give it a try to see if that does it.

 

Ah... maybe the auto tranny models don't have this feature. Interesting.

 

Nope, i tried it and it does restrict the fuel. In 5th and lightly stepping on brake you can feel it cut out.
Bummer.

 

Just get line locks for your front brakes.
I thought about doing this with my car.

 

try a search and you will find the answer. you need to unplug the sensor which is inside the center console to fully disable VDC

 

From a dead standstill, my car SOMETIMES will let me do a burnout, but not all the time. (5AT)

 

there is a 30% reduction in power for both 5at and 6mt 350z's when both pedals are pushed at once.

 

for anyone who might be interested.

https://my350z.com/forum/showthread.php?t=124915