[MineralWhiteF80]

To people with big wings on your realistic e9x track cars:

What made you choose a big rear wing, what were your expectations, and how did it actually affect your car's behavior?

I'm trying to build an informed opinion before simply nailing a big wing to the back of my track car with the expectation of better high speed stability. Unfortunately, there isn't a lot of factual data out there that you can use.

I see a lot of 'normal' track day cars and almost every e92 that circles the Nordschleife running big rear wings (bigger than the OEM GT4 or GTS wings). With the large number of big rear wings, you see almost 99% of people either running no front aero, a GT4 front lip/canards (which I don't think counts as aero but looks sweet), or a slightly more aggressive version of a GT4 lip or APR flat carbon sheet/stanchions below it. The remaining 1% are running some super aggressive Time Attack crazy setup that requires you to have an FAA 141 license. I see this on other car brands too, most cars aren't running crazy front aero yet most people have a big wing. Are the 99% just uninformed and negatively affecting their car's performance because people think "big wings make you faster" or is it a generally accepted understanding that big wings benefits outweigh the negatives?

My car's basic setup is Nitron R1 (700F/1000R springs), 18x10 wheels with 275/35/18 tires, and the GT4 front lip/canards with function brake ducting (and because it looks awesome). My car's balance and general behavior only moves toward oversteer when pushed harder. I've never had the car understeer one single time under normal track conditions, and Im usually anticipating the rear end wanting to step out. Im wondering if a rear wing of some sort can help me get back to more neutral handling while increasing high speed stability in turns between 110-140+ mph.

I see a couple of 'tried and true' options that I think are considered acceptable and are either tested by BMW or a reputable race team with lots of on track experience, but what happens when we get into the big, BIG wings that are mostly universal fitment?
- OEM GTS front lip/GTS wing
- OEM GT4 front lip/canards/GT4 wing
- Bimmerworld front lip/canards/wing