Throttle response

[Vetracr]

I have a 2010 3.0 Z4 6 speed which I autox for fun. When I autox I leave it in sport mode to retain the quasi limited slip function of the DSC system. I run nost courses in 2nd gear. My understanding is that sport mode gives you a more responsive throttle. Much to my surprise yesterday I noticed a lag in throttle response when rapidly flooring the throttle. I know there are products to speed up throttle response. Will they make throttle respond faster in sport mode? Has anyone installed one if these devices and if so did they work?

[Zyal8r]

I am quite sure that even in sport mode, the DSC is trying to slow you down because it is feeling to much wheel spin or steering angle or whatever. It can get frustrating. But if you turn it all off be careful.
There should be plenty of throttle response in second gear, in fact some drivers like a less instant pedal feel in order to modulate throttle more precisely during the turn.
I would be interested in whether you are experiencing any oil starvation while autoxing

[Tangent]

I tried on a couple of runs to leave DSC on and it definitely intervened in the throttle. Disabling it entirely will put more of the car control responsibilities on your shoulders of course but you won't get any of that throttle hesitation or other leashes on you.

As far as those throttle devices go they are all about the illusion of more power and response under part throttle and don't actually do anything to increase the speed at which the throttle opens. They essentially make the last 25% or so of throttle travel wasted and cram a more aggressive opening curve into the first parts of the pedal movement.

[dblaron30i]

Why aren't you putting the car into sport+? Another thing to try is hold down the DSC button. If you already haven't done this. When holding it you will hear a chime from your car meaning it is fully off. I don't know if just pressing it once only turns off partial control. Because why else would they put the chime there when holding if it didn't do more. But there isn't really any documentation on this that I saw.

[Vetracr]

Originally Posted by dblaron30i

Why aren't you putting the car into sport+? Another thing to try is hold down the DSC button. If you already haven't done this. When holding it you will hear a chime from your car meaning it is fully off. I don't know if just pressing it once only turns off partial control. Because why else would they put the chime there when holding if it didn't do more. But there isn't really any documentation on this that I saw.

My understanding is that sports plus turns off the DSC function disabling the limited slip capability of the rear wheels. For autox you want a limited slip capability. Sport plus leaves the throttle enhancement and steering stiffness function on but disables the DSC limited slip function. My understanding is that in DSC off mode all these functions are disabled. Correct me if I'm wrong.

[STR8-6IX]

I take it you have a turbo engine?

turbos respond much better if you roll onto the throttle VS just matting the pedal right away.

this is what you are looking for.. give it a shot. it'll put you into the seat.

[dblaron30i]

Originally Posted by Vetracr

My understanding is that sports plus turns off the DSC function disabling the limited slip capability of the rear wheels. For autox you want a limited slip capability. Sport plus leaves the throttle enhancement and steering stiffness function on but disables the DSC limited slip function. My understanding is that in DSC off mode all these functions are disabled. Correct me if I'm wrong.

Oh you are 100% right. From your original post it sounded like that is what you were looking for. Yes in auto X you are right. Yet most people confuse performance with turning off their DSC. that was why I was asking. Because it gives the false feel of gained HP.

[NoQuarter]

Originally Posted by STR8-6IX

I take it you have a turbo engine?

turbos respond much better if you roll onto the throttle VS just matting the pedal right away.

this is what you are looking for.. give it a shot. it'll put you into the seat.

Right on. If autox this car I would not mash the throttle out of every turn. Especially make sure not to hit the kick down point if you do.

[Zyal8r]

From his description I really think the OP is experiencing DSC induced throttle reduction. BTW he has a 3.0 which is NA and a 6 speed manual.

[dblaron30i]

Now that you mention it. I think that could be an issue. Have you changed the ride hight of your car or tires recently. These are things that can mess with the DSC. Mostly the ride hight.

[Vetracr]

Originally Posted by dblaron30i

Now that you mention it. I think that could be an issue. Have you changed the ride hight of your car or tires recently. These are things that can mess with the DSC. Mostly the ride hight.

I kept stock ride height and my tire diameters are same as stock. I already thought of that.

[Zyal8r]

The DSC will cut your throttle back especially in violent maneuvers such as autox. PERIOD

[STR8-6IX]

Originally Posted by Vetracr

I kept stock ride height and my tire diameters are same as stock. I already thought of that.

Do you have the turbo or na motor?

You are fully turning off Dsc by holding the button right? Have you tried rolling into the throttle yet?