ThePass

iTrader: (3)

Teaser/Head up

Variants for all of the common wings run on miatas.
All endplates feature a wide range of angle adjustment as well as shape and trailing edge design tailored to the specific airfoil.

Emphasis on efficiency - unlocking downforce while minimizing drag

-APR GTC-200: UPDATE: Available now: Singular Motorsports GTC-200 Endplates

Group Buy will open this Friday for the following variations:
-APR GT-250
-APR GTC-300
-Kognition
-Car Of Tomorrow (COT)
These variations will not be available full-time, so keep an eye out for the group buy. I’ll post a link to it here when it goes up!

UPDATE: https://www.miataturbo.net/group-buy...0/#post1178234

Testing has shown significant gains:

On a GTC-200 wing using the Singular Motorsports endplates, we’ve measured up to a 40% increase in downforce on the outer 1/3rds of the wing compared to the standard APR endplates.

Comparison:
For a benchmark, we tested the next-best option out there - the SuperMiata endplates for the GTC-200.
The SuperMiata endplates are not available for purchase, but they are a good representation of your standard “big” endplate - i.e. simple square shape with the endplate roughly centered on the wing. These yielded a 26% increase in downforce over a slightly smaller width of the wing vs. the standard APR endplate.

Don’t think you need more downforce?

First of all, that’s ridiculous!
But more importantly, these are not all about increasing max downforce (although they can achieve that) - the huge benefit here is that an optimized endplate lets you decrease your angle of attack, get the same downforce as before, with far less drag.

We've been running prototypes on Sean's car for almost a year. We saw a 5mph gain on the front straight at ACS with this strategy by switching to our endplates from SuperMiata endplates.

APR GTC-200 Series:



Car Of Tomorrow Series mounted:



Kognition & GTC-300 (Right) besides the COT/GT-250 version (Left). At first glance each of the endplates look similar, but side by side you can see that each one has unique shape/dimensions/features tailored for its wing.



I’m working on a tech article that goes into greater depth about how endplates affect the airflow and performance of an airfoil. That's coming soon!

-Ryan

concealer404

iTrader: (3)

Is there a thread for these wings similar to the Suspension Hierarchy thread?

I don't have a wing yet, but as you say that these won't be available full-time, i need to consider the idea of just buying plates now, sourcing wing later.

ThePass

iTrader: (3)

Not that I am aware of, though it may be out there, the internet is a big place..

GTC-200: Most common wing found on Miatas. Smallest wing offered by APR, 3D airfoil shape works well at below-roofline heights. Miata-specific mounts are available off-the-shelf. Lowest cost wing that you can be confident will provide noticeable gains. 949 Racing sells (or used to?) a budget non-carbon version.

GTC-300: Next size up in the APR line. 3D shape. Very popular among S2K, Evo, BMW, etc. track crowds. Big downforce on a miata. 949 Racing has run these in some situations (higher HP builds) and offers it with miata-specific mounts.

GTC-250: APR's 2D airfoil. What 949's Crusher ran in PTC trim. 949 sells this. Custom uprights needed.

COT: Found second-hand from the NASCAR Car of Tomorrow cars. 2D wing, high-end construction at a very low price. Airfoil shape optimized for high speed/low drag (higher speeds than miatas see). Everyone scooped these up when they were available from eBay, Roush, etc. Very difficult to find these now. I run one on my car as does Keith on the Targa V8 Miata.

Kognition: Your go-to manufacturer for serious wings for time attack/road race applications at (relatively) affordable prices. Available in custom widths and mount dimensions. More $$$ than the rest. Andrew had one for Theseus but sold it to GeneSplicer (who is getting a set of our endplates for it)

There are plenty of other wings out there; Voltex, Crawford, etc... but the above comprises probably 90% of what is found on Miatas.

The group buy is going to have an option for those who have other wings to get our endplates in a drill-it-yourself version. If you don't yet have a wing and have no idea which one you'll get, you may wish to get this option and drill it for the wing you choose later.

-Ryan

joyrider

iTrader: (8)

Well you got me there, what are Sean's car spec to give us an idea...

concealer404

iTrader: (3)

I think i'd need/want a 300, COT, or Kognition, but yeah... i'm not sure i want to bank on finding another COT for a price that makes sense getting over one of the other options.

HRM.

Will keep an eye on things regardless. You guys are doing some seriously cool stuff!

Lincoln Logs

iTrader: (1)

At the time my car was running with ~140whp from a junkyard NB1 engine with the basics (coilovers, 15x9s, 949 Front Air dam). End plates made a perceivable impact on aero balance when I moved to the bigger design, both through seat of the pants and via data logging.

-Sean

joyrider

iTrader: (8)

Well thanks Sean ! I'm in for a set then (supermiata GTC-200)...

GeneSplicer

iTrader: (14)

I am? Oh yeah, that's right

Mobius

iTrader: (2)

Consider me signed up for COT version. Seksay.

Jeffbucc

Man, I don't even see myself having a wing in the near foreseeable future and I'll probably be getting the GTC-200 plates....bastards.

Monk

iTrader: (3)

You guys are full of win lately.

Double O 86

mcfandango

iTrader: (1)

Do you have the area of the end plates available? Some of us are limited in surface area by the rules.

ThePass

iTrader: (3)

Varies depending on which endplate we are talking about. Which ruleset limits you by surface area?

For those competing with NASA who are points-conscious, we'll be offering "zero-point" versions which will be slightly shorter.

The GTC-300 and Kognition have very similar profiles so endplate design is the same for each, bolt layout is the only difference. So we could do an undrilled set of that plate design, you drill it later.

I'll try to explain better in the group buy thread, but there are three endplate designs; GTC-200, GT-250/COT, and GTC-300/Kognition. For the latter two, bolt hole layout changes according to which wing you have, but overall shape is the same.


-Ryan

mcfandango

iTrader: (1)

As an FYI - SCCA Solo rules for both SM and XP categories have similar requirements. I think most end up building their own since auto-x'ers are less concerned with overall drag due to the lower speeds. But some will always seek the sharpest knife.

Wing endplate surface area is limited to 200 sq. in. each and limited to a maximum of 2.

ThePass

iTrader: (3)

Just measured. All of our endplates fit within the 200 sq. in. limits. It wasn't intentional, but turns out these are pretty well optimized for those rules - the COT/GT-250 and Kognition/GTC-300 are ~190 sq. in. The GTC-200 version is slightly less.

-Ryan

OGRacing

iTrader: (1)

love the idea. on the end plate. leave the rear section flat. then install a 1/2" of angled 90* aluminum to that edge. this will create a low pressure area behind the wing and speed up the air flow under it. thus more down force...

ThePass

iTrader: (3)

I have a gurney flap like you're describing on the endplates on my car.
We have a shelf full of endplate variations that we put through testing - several with various elements/shapes along the trailing edge - before we settled on these.

I intentionally made the trailing edge straight so that if one wishes they can play with attaching a gurney flap. In our testing we saw that trailing edge elements/gurneys can improve outwash and create a virtual endplate extension, further adding to peak downforce numbers, but the trade-off is more fluctuation in pressure, whereas a 2D endplate creates a more constant amount of pressure.

I'm experimenting with some more radical trailing edge stuff on a new version of endplates on my car, but that gets into stuff that becomes car-specific, not something that will just bolt on to any car and work the same. I'll post some pics of that stuff as it develops though just for fun discussion material

-Ryan

greddygalant

iTrader: (3)

Id be interested in a set for Lazarus, depends on which wing I end up with.

Supe

Any idea on COT pricing?