OK guys, time for me to feel really dumb. I just got a really good deal on a GTC-200, and I'm trying to figure out best placement. I know this has been discussed pretty thoroughly but I wasn't sure if the placement changes because I have a BBFX spoiler already on the car and I've read that they can work pretty well in concert with each other.

-Do I still want to place the wing as far back as possible on the trunk (and trim the spoiler around the feet)?
-Should I place it further forward because of some aerodynamic interaction magic I don't understand between the wing and the spoiler?
-Should I man up and make 3/8" 6061 uprights that tie into the rear quarters like the singular mounts?

It's also worth noting that this is a WRX specific GTC200, not a Miata or universal version, so the mounting feet are super duck footed (imagine the feet look like \ / )

Any help is appreciated







you can see the duck footed-ness in this pic.

 

I guess I could always just remove the spoiler and run the wing on its own, I've just read that they can work together, but I know that aerodynamic interactions can be counter intuitive sometimes.

I've been digging more today but I'm still coming up dry...

 

I know Ryan Passey (ThePass) was protested recently at COTA for his "Duck tail" in concert with his wing. I would keep the AoA of the BBFW spoiler pretty low and maybe pick his brain a little.

https://www.miataturbo.net/engine-pe...5/#post1523441

 

The trunk extension wasn't protested for being "in concert" with the wing. It was a standalone thing and wasn't the only person that the guy protested for having a non OEM trunk spoiler and a wing at the same time.


That being said, you could lay down the BBFW spoiler nearly flat and run the wing but the bigger question is what are you doing at the front to balance it out. The other thing to note is that the GTC200 is a "low mount" style 3D element that is not meant to be run up high at the roof line in the first place. Seems like the two would nearly be running into each other...

 

The Pass's old posts are most of what I've been reading about this wing actually. It seems like max effective height would be one more set of risers, but the one set of risers still puts this in a somewhat decent position (from what I've gathered). I'm more curious if it's just totally stupid to have the wing pushed a bit further forward so I don't have to modify/remove the spoiler.

If I were to make new uprights I'd only make them a couple inches taller than the current setup so it'd be like I had that second set of risers.

Honestly I'm trying to maximize rear downforce with this setup. A gurney/endplates are on the "to order" list. I'll be doing enough splitter/canards in the front to balance out the rear. The car is primarily for autocross so I'm just trying to make it as sticky as possible even if it might be draggy

 

I'm currently fixing some peeling clear on the wing, but as soon as that's up to spec I think I'm going to just mount is as far back as I can without interfering with the spoiler (pic1 in OP). The trunk is already got a bunch of holes in it, if I have to change the mounting it's not a huge deal to fill holes and get a new piece of vinyl.

If anyone thinks this is incredibly dumb, please let me know before the drill comes out

 

Wow, it`s looks really cool

 

your pictures are broken

 

Weird, I could see them fine on my desktop but they were broken on another computer. Re-uploaded and it looks like they're working now.