[malicem3]

If you're looking to go over 140, I'd buy a different car that's inherently more aerodynamic.

[TheCoolX3]

Originally Posted by malicem3

If you're looking to go over 140, I'd buy a different car that's inherently more aerodynamic.

Now where's the fun in that? My goal with this car is to show that SUVs can be cool, practical and be competitive. If a 335i can go 140 easily I want too aswell. If I just go out and buy another car that's more aerodynamic or better suits what i want to do what's the point in modding cars anyway?

I have other cars that are much better suited to go fast but the world needs a fast, stable, good looking, and 'affordable' suv and I think the X3 platform is a good place to start!

[Riick]

Adding a rear spoiler puts more weight on the rear tires and lifts up the front end. It will make your situation even worse at high speed, even dangerous.

You need to add front downforce which you'll only get by lowering the vehicle to the dirt and adding a front air dam/splitter. You'll need coilovers and slam the SUV as low as it can go, then fix then put the alignment back to OEM specs.

[TheCoolX3]

Originally Posted by Riick

Adding a rear spoiler puts more weight on the rear tires and lifts up the front end. It will make your situation even worse at high speed, even dangerous.

You need to add front downforce which you'll only get by lowering the vehicle to the dirt and adding a front air dam/splitter. You'll need coilovers and slam the SUV as low as it can go, then fix then put the alignment back to OEM specs.

Have coilovers that I'll be installing soon along with a test diffuser and front splitter. Car is currently in OEM alignment

[Victoracer]

Got em! Lololololol

[TEF]

Perhaps the X3 is the wrong vehicle for for high-speed driving. Why not consider an M3 that might be cheaper and easier than converting an SUV into a Ferrari? Once one lowers the X3 to improve handling at speed, isn't your vehicle essentially an (overweight) 3 Series station wagon?

[TheCoolX3]

Yeah that would be smart, and I do have a few cars that are much better for high speed but wheres the fun in that. Fast SUVs are awesome. My Cayenne Turbo S will sit at 150 all day. My 911 will go faster all day too.

The x3 is far from the right vehicle but I find it fun accepting a challenge and playing with my cars a bit. The next car I will buy will be an X3M or an F90. Both are/will be cars that will handle high speed effortlessly. I find it fun making a car do something it was really not designed for at all and having it compete and beat some cars that were designed to go fast. Everyone has an M3 that can go fast but not everyone has a ~500 HP X3 that can go fast. I like a nice sleeper car that can be an amazing daily, and walk out any highschooler that thinks his G3x is fast while I have a trunk full of groceries and my dogs in the back seat.

If I wanted to break necks id go and buy a 720s.

Originally Posted by TEF

Perhaps the X3 is the wrong vehicle for for high-speed driving. Why not consider an M3 that might be cheaper and easier than converting an SUV into a Ferrari? Once one lowers the X3 to improve handling at speed, isn't your vehicle essentially an (overweight) 3 Series station wagon?

[pokerface]

So this is a thing now:

https://www.ebay.com/itm/Car-Mini-Ta...-/302179312016

[TheCoolX3]

Hahahah I love it! Anyone wanna do a group buy?

Originally Posted by pokerface

So this is a thing now:

https://www.ebay.com/itm/Car-Mini-Ta...-/302179312016

[x3sm]

Spoiler for F25 :

https://www.aliexpress.com/item/F25-...a-f4b339f612b5

[TheCoolX3]

Thanks for the Post! was thinking about this or an AC one

I was looking around and I saw this.. I really like the diffuser but I could live without the splitter. I am kind of concerned that the parts are taped on lol

https://www.aliexpress.com/item/F25-...7-8eb05f69c780

Originally Posted by x3sm

Spoiler for F25 :

https://www.aliexpress.com/item/F25-...a-f4b339f612b5

[Riick]

A rear spoiler will put more weight on the rear tires and less weight on the front tires, making the problem even worse.

[x3sm]

If anything that spoiler from ali is just a tad longer than OEM so no extra downforce created, just displaces the wind drag an inch down the road lol. Most of the exterior mods we will do to these cars will not create any noticeable difference even if you are going 140 lol just purely cosmetic.

But, if you want to try something I would find a high grade aluminum sheet or carbon sheet and cut it to the shape of front bumper slightly poking out and see if it helps.

[Scout10]

Its still the only truth left.................if you can't do it on top, " ground effects" . . . suck

i.e.. dam/ splitter / side dams (even behind rear wheels)

Then go do it as many times as you want. (aerodynamics)

[pokerface]

Originally Posted by TheCoolX3

Thanks for the Post! was thinking about this or an AC one

I was looking around and I saw this.. I really like the diffuser but I could live without the splitter. I am kind of concerned that the parts are taped on lol

https://www.aliexpress.com/item/F25-...7-8eb05f69c780

hard to visualize. How will this actually look installed?

[TheCoolX3]

I think the diffuser will look very good and give it a nice aggressive look

Originally Posted by pokerface

hard to visualize. How will this actually look installed?

[335iAP]

Just out of curiosity, I wonder if the X4 is better or worse in the aero department

[Prevost87]

Originally Posted by TheCoolX3

Looking to add a little down force to my x3. At around 140 it just feels like it's going to take off. ( ALL TESTING DONE IN MEXICO ) I bought some coil overs and I am going to be lowering the car a good bit but that will make little to no difference towards its flight characteristics. I intend to do a PURE stage 2 upgrade soon so going fast is going to happen a lot

I could put a big wang on her but that would look incredibly stupid, so does anyone know of anything that would look good but would still be functional in adding some downforce? The issue is there is not much love for our beloved f25 in the aftermarket world and most things areo look rice on an X3.

Am I just asking too much for high speed stability out of a $60,000 SUV?

At 240 kpm... 140+ mph, the 2018 X3 m40i felt fine to me on the autobahn. Not sure if the 2019 had an aerodynamic tweaks but it should be for the better.

[TheCoolX3]

Originally Posted by Prevost87

At 240 kpm... 140+ mph, the 2018 X3 m40i felt fine to me on the autobahn. Not sure if the 2019 had an aerodynamic tweaks but it should be for the better.

Thanks for the input! I drove around an x5m and that felt pretty good at high speed. Gonna try to build some custom aero based off the x5m

[Prevost87]

Originally Posted by TheCoolX3

Thanks for the input! I drove around an x5m and that felt pretty good at high speed. Gonna try to build some custom aero based off the x5m

Not a bad idea. That X5M is something serious. I never drove one but I have a friend with an older X6M who has a lead foot so I can only imagine. It's funny seeing her when she's late somewhere and starts putting that V8 twin turbo to work. Good luck with those aero mods.

[x3sm]

Sorry OP, but I didn't want to create another thread lol

I want to make some fender trims for my X3 due to wider wheels, anyone have any recommendations ?

Looking to do something similar to GLC63 rear fender flares splash trims :







SQ5



Front trims

[scostu]

Front splittler added.....Maxton design UK