Most liked posts in thread: Left foot braking with auto trany

Wow. Is that the solution they implemented after the Toyota sticky throttle fiasco?

 

Is the DCS nanny turned off when you are doing this?

I don't think that this is because of the Toyota floormat/operator error fiasco. There will come a day when big brother equips our cars with another nanny because of the Toyota fiasco. On that you can be sure.

 

When I was Autox'ing my '06 GTI with a DSG I ran into the same issue. It wanted to kill throttle as soon as you touched the brake. Even with all the traction aids off. I actually had to adjust for that while left foot braking & trail braking.

However, if you are hitting the brake hard while on the gas or vice versa you arent helping yourself anyway at an Autox. It'll just slow you down. You'll need to give that brief moment (which while autox'ing feels like forever) for the hardware to "catch-up". Then you should be good.

As far as the momentum car thing... Eh, not so much at an AutoX. For the most part both generations have enough torque and a wide enough powerband not to be entirely momentum based. On a longer open track? Then yes, its a momentum car.

Good luck & skill. Enjoy the cone dodging!

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Wow, my '09 does not do that and I don't think I like the idea very much. Perhaps MINI should have two versions available. One for people who actually like to drive and one to protect idiots from themselves. :frown2:

Jim

 

Thanks for the explanation Redbeard. I had read that even when one switches the stability nanny off on a GTI it is still on, just to a lesser degree.

I do not left foot brake, but I have a friend who does. It can really help rotate a car, but like you I think at lower speeds it doesn't do much.

 

Are you sure? My '04 does it. I noticed it while bedding in brake pads. If I brake while accelerating, it cuts power after about 2 sec. Maybe the interval has been shortened for the auto. I'll try the '10 auto today and see.

 

I might add that I have the sprint booster, set to highest position and the sport button on. If that could make a difference. I really do not feel a cut in power.

Jim

 

OK, I drove both this morning.
The 04 std shift, at any steady state throttle, if I apply the brake while still applying throttle, after about 2 seconds, the throttle goes to idle.

In the '10 auto, sport or not, man shift mode or not, the throttle is not altered by left foot brake UNLESS I'm at WOT. I did not expect that.

Must be a difference between the programming in a r53 vs a r56/57.

 

Yep....my 04 does it too. Found out way back when while doing my first brake job. Trick is to just let up a bit on the gas while braking. It will also help you learn to trail brake easier.

Also did it on the 06 S auto I had as a loaner for a few weeks.

 

I know you want to get faster but if you are hard on the gas and hitting the brake at the same time you arent helping yourself go any faster. Proper trail braking (useful for autox) doesnt involve using the gas at all. Its a matter to balancing brake with turn-in to keep the weight bias towards the front before getting to the apex. No gas involved. Tough to learn but it can cut as much as a full second off your time in a 35-40 course if used well. The throttle "nanny" shouldnt be an issue.

If you are left foot braking using gas in order to "tuck-in" the front to avoid understeer you have two things working against you. 1) You dont have a full brake balance control and you are gonna do a good job toasting pads, rotors, and CV joints. 2) The auto tranny, regardless of mode, isn't gonna live long with that sort of stress. It simply wasn't designed for that. Hence the the throttle "nanny".

As far as the traction control in the GTI: Yeah, with the ESP switched off it still used the front brakes to act as a differential under extreme cornering. Not so hot...

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Good info Redbeard.

I am also impressed with how long a post you can make using your phone. Mine are very short. :lol:

Jim

 

A result of my lazyness. I sit at the TV downstairs and use the Wi-Fi connect with my phone and surf... :lol:

 

Yup, that's trail braking. Most people ride the brakes into the corner when they're driving on the street, but it's an entirely different matter when you're doing it at the limit of adhesion. It's a really good technique with a front wheel drive car because you can keep the nose of the car from popping up and upsetting your traction. It's all a matter of being very smooth on and off the pedals.

 

And I think the whole definition of left foot braking needs to be addressed. The advantage to left foot braking is not to slam on the brakes while holding down the throttle, it is more about conservation of time. You aren't wasting time shifting from the gas to the brake with one foot. You are able to smoothly transfer from one to the other w/o upsetting the car.