[JDM4E]

I recently testdrove MY2017 BRZ finally, and being on autobahns I can do some speed. I immediately noticed, that while the car being stable at high speeds, it was very vulnerable to (probably) any wind. The surface was smooth, so I don't think it was bad roads but rather wind, also I did not feel anything in a steering wheel (like from low-profile tires, etc).

I checked the forums and there are hints about it there and there, so I think it is worth to its own solution thread.

Around 100 mph car is "jumping" left and right, while obviously I drove straight. The car was stock, dealers presentation model. I am unhappy about it, since I want from a car to be able drive at those speeds at ease and it is one of the reasons I wanted a good handling sports-car. I have never experienced vulnerability like that in any car I have driven, including estates with much more side-area. And lastly, my Accord with the same Primacy HP tires (225/50/17) is rock stable at those speeds. No feedback and soft, but stable.

Do anybody know a reason for this, and more importantly, can anything be done to solve this to be at least "normal"?

Thank you!