Yes.


Very functional. I tried one at MRLS and it made a huge difference in feel.
It's adjustable to suit any speed a Miata is capable of.

 

Its adjustable. It can be set high for low speed (auto-x). Or set lower for less drag.

 

Are all the bolts that come in the kit stainless steel?

 

All of the spoiler bolts are SS, the adjuster bolts are Cad plated.

Mazdaspeeder, in terms of lap time drop per dollar spent and reliability, it's simply unbeatable.
The complete kit is $280 and includes everything, most users report at least a second dropped around their local track (many report 2-3 secs..).
It's as consistent as the sun and more reliable than a rock.

 

Just to show adjustment range -



Super high AOA for Autox



Typical setting for low / medium speed tracks (25º-35º)



Low AOA for high speed tracks that you want less drag penalty would be around 12º-15º (shown on the higher side of that range, can be adjusted further down)

 

Moti, would you mind confirming the use of the 2 different sets of holes for the supports?

Best way to measure the AOA?

 

Adjusting to the lower range of the AOA requires the use of the outer most holes on the spoiler.
The inner set of holes is used for the mid-high range and will adjust to higher AOA than the outer set is capable of (even more so on NB).

I use this to measure -

 

Adding more to this convo.
I'm a firm believer that adjustable parts should be played with so that you can get the understanding what the adjustment does and get a feel for it.
I see a lot of people buying adjustable parts and never touch it beyond the initial adjustment when the part was installed... Sway bars, coil overs and many other parts, including our spoilers.
TRY IT!
Go to your next track day and run different AOA every session so you get the feeling for what changes.
Don't be afraid to change AOA in big chunks, because it's only once you learn the difference between 15 degrees, 25 degrees and 35 degrees will you be able to tell how to fine tune the spoiler to your preferences at different tracks.
You won't get that understanding by going from 16 to 17.5 degrees..

Once you try adjusting in big chunks you'll be able to tell where you were closest to the balance that felt good and made you drive fastest.
Using a numerical example, let's say you go out and run the car at 15 degrees AOA, and on the track you're running the balance felt tail happy.
Next session you bring it up to 25 degrees, balance improves but you still get a wiggle every now and again.
Next session you bump it up to 35 degrees and now the car understeers.
Your mental notes say your car felt best close to the 25 mark but could use a bit more grip, now you can try and fine tune and you back it down to 27 degrees.
Rinse and repeat until you find your happy spot for that given track and make note of it, you'll be able to go back to it right from the get go the next time you're at that track.

Note that the time sheets don't lie and it could be that the car will be capable of delivering the fastest time when you still have a wiggle or a bit of understeer, so make sure you take that into account.

 

So lets say the effectiveness of a GTC200 is 8 on a 1-10 scale. What's the effectiveness of this? Not sure if this can really be answered

 

Not sure what the answer is, but the price point makes a big difference, the spoiler costs somewhere between a third and a quarter...

 

Moti,
The lexan seems to prefer having a slight "U" to it, where the side supports give a little higher angle than the center. Have you noticed this or or do set the angle the same all the way across?

Or I'm possiblying not adjusting it properly.

 

I've only been doing some street driving to get a feel for the spoiler.

At a seriously aggressive 40 degrees, at around 90mph I swear I felt a light and floaty front end. BBFW confirmed that's really high AOA for those speeds.


I adjusted ride height, I had a little negative rake, to a more appropriate 4 1/16"F and 4 1/4"R, , and dropped spoiler to around 25 degrees. (on MCS suspension)


Airstrip autocross this weekend, so I'll get to play around with it more but it sounds like I will want to crank it back up for this event.

 

It's 1/8" Lexan, it can bend to a U shape if you want or run it flat (as some racing classes require, SuperMiata comes to mind).
Majority of the users run it flat, I have not done any testing on flat vs. curved to give you a positive answer.

 

I tend to set the outer edges a little higher than the middle because it seems to keep it a bit more stiff. No idea if it has an affect on performance in anyway however.

 

Yes, same here.

 

Just got mine installed this weekend. Going to try the aero route for filling out my street car TTE points build before accepting that I need to go no aero MS2/3 for POWWAAHHHHH. I'm just lazy and don't want to swap stuff around for my once a year inspection. Initial test drive on Lime Creek Road felt fantastic. Unfortunately my Harris Hill trial membership just ran out so I can't do objective A/B testing. I have a solid hotlap out there from a month ago, so will just have to tag along as a guest with someone soon. Hoping aero + RC1's vs rock hard year+ old ZII's gets me much, much closer to that sub 1:30.