Cross winds at high speed (un)stability

[JDM4E]

Originally Posted by ls1ac

We drive well over 100 on the track and have never noticed that. We do use track tires and a good alignment, so I doubt it is body related.

- was it windy?
- was the track hidden from wind? here in europe most track has tribunes and are in a hole with a lot of wind/sound deflectors like trees and barriers.
- could be body related but your track setup might compensate

[Mr Nerd]

Originally Posted by JDM4E

Thanks for the input. If you have this kind of behavior on the same roads with the correct setup, it seems like the wind is the variable. Perhaps you can try drive in pedal dance mode then? Personally I think it is highly unlikely this to be caused by ESP, but you never know. Can you try?

Sorry I forgot to mention that, yes, I have tested the conditions in Pedal Dance Mode. The car does drive noticeably different in PDM. This is why I brought up the topic. PDM shuts off a few different systems tho so it is hard to determine which ones are responsible for the strange effect when driving in windy conditions.

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[JDM4E]

Originally Posted by Mr Nerd

Sorry I forgot to mention that, yes, I have tested the conditions in Pedal Dance Mode. The car does drive noticeably different in PDM. This is why I brought up the topic. PDM shuts off a few different systems tho so it is hard to determine which ones are responsible for the strange effect when driving in windy conditions.

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So you are saying, that you drive with pedal dance and the car is calm, and then you switch back to default all-on setting and the car became unstable like we experience? If so, then holy fuck.

[Mr Nerd]

Originally Posted by JDM4E

So you are saying, that you drive with pedal dance and the car is calm, and then you switch back to default all-on setting and the car became unstable like we experience? If so, then holy fuck.

I would not say the PDM completely eliminates the problem. But it does make me feel more confident when driving on the freeway.

HOWEVER, none of my "tests" were in absolute controlled environments. So having said that, all of this information could be completely wrong. There are MANY variables and at the end of the day no one factually knows what PDM actually does. There is plenty of hard evidence but nothing in writing anywhere that I am aware of.

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[strat61caster]

Originally Posted by Mr Nerd

I would not say the PDM completely eliminates the problem. But it does make me feel more confident when driving on the freeway.

I can't imagine what conditions are like that you're getting wheelspin while cruising down the freeway, that's just bonkers to me.

If the wheels aren't spinning the TC isn't doing anything and you're fooling yourself.

[guybo]

But it does make me feel more confident when driving on the freeway

The traction control system does nothing on the highway. If you "feel" more confident on the highway with no nannies on, it's just because you feel good about it, not because you actually feel any difference. I don't think most people understand at all how the traction control system works.

[Mr Nerd]

When did I mention traction control?

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[strat61caster]

Originally Posted by Mr Nerd

When did I mention traction control?

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Pedal dance is explicitly a diagnostic mode that affects traction control, nothing else to my knowledge.

No electronic setting affects how this car travels down a road without tire slippage, excluding the engine performance.

[stevesnj]

Get a rear diffuser, front lip side canards, under panels and spoiler. Then get back to us.

[Mr Nerd]

Originally Posted by stevesnj

Get a rear diffuser, front lip side canards, under panels and spoiler. Then get back to us.

I have all of these, with the exception of a rear diffuser.

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[ls1ac]

In response, Road America, Gingerman, Blackhawk, Chicago Autobahn. We do not drive in a hurricanes but yes we do get windy days.
Could your body mods change the air under the car in an adverse way? (I know it is supposed to help.)
I do not remember anyone else in the past 5 yr. having aero stability problems with a stock car.

[Mr Nerd]

Originally Posted by ls1ac

In response, Road America, Gingerman, Blackhawk, Chicago Autobahn. We do not drive in a hurricanes but yes we do get windy days.
Could your body mods change the air under the car in an adverse way? (I know it is supposed to help.)
I do not remember anyone else in the past 5 yr. having aero stability problems with a stock car.

I use Autodesk Flow Design wind tunnel software to ensure that call of my mods are aerodynamically functional. I have simulated it countless times in my wind tunnel and all of the mods help only due to increased downforce. However, downforce is only beneficial up to a certain degree before it starts to feel like you're driving under water.

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[ls1ac]

I was referring to the OP that had modded his car and was having problems in Europe with the car darting right and left in the wind.

[Mr Nerd]

Originally Posted by ls1ac

I was referring to the OP that had modded his car and was having problems in Europe with the car darting right and left in the wind.

Being in Europe isn't going to make a difference. I suffer from all of the same problems in America. 😞 And I have opted for all of the solutions in this post. So whether I am the OP or not, what is your point?

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