ICULQQK

Sturdy Bois seem to be the trick for a full track car, but I'm still trying to maintain a stock look and I am planning a smaller airdamn under the mouth. Does anyone have experience with any off the shelf solutions that retail more of the bumper?

curly

iTrader: (25)

Keep in mind I’m not a fan of it, because if you NEED front down force then you should cut the bottom of the bumper off and do an air dam, im not a fan of compromises, form over function, etc. that being said, we have two customers at my work with splitters under a stock bumper with just a GV style lip. They did these after they bolted giant voltex wings on and were confused how they didn’t make them go faster. As far as I know the splitters balanced out the wings though.

doward

Yea, this math equation starts with the easy-to-produce rear downforce you're trying to balance

Alejo_NIN

iTrader: (2)

basically, what you are saying is that they negate each other so the car drives as if none were installed?
effectively making both mods Form over Function?

flier129

iTrader: (7)

It's the undercut front bumper that causes the biggest issue on NA/NB. If you source an aftermarket bumper that has less of an undercut at the bottom or even none at all then you'll be doing better.

Just for fun numbers, a wing only at 2* has a 368.2% rearward balance Don't know the numbers for splitter without airdam...... that combo was never ran in CFD.

Stock

Form > function.

Jk, I can’t find another bumper to cut up.

thebeerbaron

iTrader: (1)

No ... balanced does not mean negates. In very broad terms:

With too much rear wing, the car is going to understeer when the wing is generating too much downforce. And then there's the extra drag from the wing. This is probably why Curly's customers didn't go faster.
With too much front splitter, the car is going to oversteer when the splitter is generating too much downforce.

With a balanced setup, the car neither overseers nor understeers, but enjoys the benefit of downforce at the expense of some drag.

HTH, wasn't entirely sure if you were being facetious.

curly

iTrader: (25)

I was going to say the same thing. Wing only setup felt like **** to both customers, so they added splitters. But neither wanted to cut up the bumper for an air dam, so they sacrificed some front down force for looks, hence, form > function, BUT, it still worked as far as I know.

There's some basic aero principles that make a splitter/air dam work, like having a vertical surface above the splitter, and sealing said surface to the splitter. The uncut bumper/lip setup never seals well, and has a "dirty" edge above the splitter, so therefore, in my mind (no wind tunnel to back up), it's less functional.

ICULQQK

I am fine removing the horizontal portion of the undercut and I'll seal it to the splitter... I'm just struggling on finding a good way to hang the splitter that stays behind the bumper cover.

curly

iTrader: (25)

The customers I've been talking about used these, with Racebred splitters: https://www.rennwaffen.com/gfp/kazes...ets-for-miatas

Cant help you on where to find them in stock though

flier129

iTrader: (7)

One important piece missing on Racebred splitters is the center section reaching all the way to the steering rack. I'd cut your own splitter or buy a 9LR splitter that has that section in it.

I've hung splitters with cables and eye-let bolts on the splitter side with success. I've even done it behind OEM bumper skin,

ICULQQK

Any photos?

Alejo_NIN

iTrader: (2)

hey, thanks for not being an *******
it was a legit Q...i'm still learning.

i was thinking of Waves, how two opposing waves cancel each other, but i see your point.

Gee Emm

We all are! And this forum section (aerodynamics) is the place to be. Read the stickies, browse the topics. Start with the intro and history sticky, it's a goldmine.