How to Xida.
 

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Supermiata Xidas for the NA/NB are divided into two families based on damper length:



Xida Race
Xida Race are the original short body. Designed/optimized for pinch weld heights of 4~5.25" with ~23" tires.
One ("singles”) or three ("triples") damping adjustments.


Xida XL family: XL, GS and ACE
Xida XL/GS dampers share the same internal/external construction and valving with the Xida Race, they are just longer. Pinch weld heights of 5.25~6.5" with ~23" tires.
One ("singles") or two ("doubles") damping adjustments.
GS and XL variants use the exact same damper, just different springs, mounts, helpers.
ACE are the same length as GS/XL but with electronic semi-active dynamically controlled damping adjustments.

Why XL family:
The Xida XL will allow taller ride heights that raise the roll centers closer to OEM. This beneficial change increases natural roll resistance allowing the use of softer springs and smaller sway bars for a given roll stiffness. Big sway bars and stiff springs are the enemy of ride quality on bad roads. These features together allow even better ride quality on the street than Xida Race.
-You wish to install them on an Exocet or Catfish kit car that uses Miata underpinnings. The suspension geometry of these cars is slightly different than the stock Miata so they benefit from the longer length Xida
-You require speed bump or steep driveway clearance, or simply don't want/need the car that low.
-You have drop spindles on your NA/NB Miata.




Supermiata Xida Race
The original Xida Race was designed and engineered from scratch to win championships in road course, autocross, sprint and endurance racing. More track records, race wins, and national championships have been won on Xida Race than any other Miata coilover.
Xida Race have more bump travel than OEM, sometimes requiring fender or liner modification with big race tires. This critical extra bump travel is made possible by using shorter than OEM shock bodies. This results in reduced droop travel compared to our Xida XL/GS/ACE. The use of low friction internal coatings, precision assembly and pro motorsports level technology result in the supple ride quality that have made Xida’s the gold standard for NA/NB coilovers. Xida Race optimal pinch weld heights are between 4” and 5.25”.

Xida Race user:
-Xida Race users want the maximum amount of grip/performance/handling and are willing or able to use the lower ride heights.
-Xida Race’s adjustment range tops out around 5” on heavy cars (MSM, or any Miata with full options + roll bar and both tops, ~2500lbs with driver etc.)
https://supermiata.com/xida-coilover-miata.aspx


Supermiata Xida XL
The new Supermiata Xida XL are the exact same technology/valving/materials as the original Xida Race. They are simply longer, within a few millimeters of OEM length in order to function properly at ride heights above 5.25”, up to OEM height. We recommend setting Xida XL up with OEM sway bars for best ride quality. The taller ride height raises roll centers so roll stiffness is naturally increased. This means bigger diameter, stiff riding sway bars are not needed.

Reasons you may wish to go with Xida XLs:
-You do not wish to lower your car significantly, whether for personal aesthetic preferences, logistical reasons like speedbump or driveway clearance, or simply ease of entry into and out of the car.
-You wish to install them on an Exocet or Catfish kitcar that uses Miata underpinnings.
-You are using drop spindles on your Miata, which require near OEM length shock bodies.
-You are seeking the best possible ride quality which requires 450/300 or possibly 300/200 rates

The extra length of the Xida XL shock body allows us to introduce several exciting new Xida variants:

https://supermiata.com/xida-XL-coilover-miata.aspx


Supermiata Xida GS
The “Gran Sport” Xida ships with 550/350 spring rates with no customizable options. These rates offer a firm ride for more aggressive driving, HPDE or autocross while retaining the taller 5.25" ~ 6.25" ride height range of the XL. We recommend setting Xida GS up with OEM sway bars. At most, a 24mm or 25.4mm (1") front bar.

The Xida GS
-uses a fuly adjustable, single adjustable Xida XL shock
-swaps the customizable rate, motorsport grade Hyperco springs for a lower cost, standard grade 550/350lb spring set.
- deletes the higher cost dual spring system, instead using a longer length single main spring and zero rate tender.
- deletes the higher cost Billet Coaxial Mounts and uses an NB style bushing mount.

Reasons you should select the Xida GS:
-You want good day to day ride quality, with great weekend or casual sport handling and don’t need all the motorsports grade options of the normal Xida system.
-You do not wish to lower your car significantly, whether for personal aesthetic preferences, logistical reasons like speedbump or driveway clearance, or simply ease of entry into and out of the car.

https://supermiata.com/Xida-GS-Coilover-Miata-MX5.aspx

Supermiata Xida Ace
Xida ACE are electronic dynamically self-adjusting dampers using Tractive’s DDA piston. This system controls both rebound and compression in near infinite steps over a wider range than is possible with traditional manual "clickers". The ACE system is like today’s high-end OEM systems in that it continuously adjusts the shocks at 100hz (10ms) over the full range in force increments as small as 2lbs. That's very fine tuning of damping force based on the included accelerometer and user settings from the two-button wired fob. Only a few international pro level racing classes allow this technology. When they do, the winning teams employ it.

What you will experience with ACE is an almost magical combination of eerily plush ride quality yet with instantaneous responsiveness. How plush, how instantaneous is up to you, courtesy of the control fob. Nothing rides better than ACE. They are banned in 48 states. They most interesting man in the world has Xida ACE.


Xida ACE user:
- You are not bound by competition rules restricting the use of state of the art semi-active suspension.
- You wish to achieve the absolute best ride quality and not want to stop the car, open the hood/trunk and adjust the shocks when you want to go play. Just hit a button and let the system do it for you.
https://supermiata.com/Xida-ACE-coilover-miata.aspx

On account of the shitty roads here in SC, the GS is what appeals most to me. Though I mostly drive on the street, I also do a handful of HPDE's a year on the latest 200tw sticky stuff. I'm driving at a pretty high level (NASA HPDE4, I instruct in other groups) - will I be left wishing for more spring or will I still be able to have fun?

I apparently bought a year too early. Oh well. The GS or XL are exactly what I want. But even with the race ones on 700/400 an 5" pinchweld it still rides better than stock. I am right at the top of the threads (car weighs ~2300lbs). Maybe someday I will see if anyone wants to trade out.

Keep up the amazing work.

GS are designed for exactly what you (and a lot of other drivers) are doing.

Go with the GS. You won't be sad, just crank up the firmness on the track. You will also save money by not needing to change sway bars.

Ready to Xida, but no Race in stock. Any estimates for availability?

Email me. ;)

Info@949racing.com

Amusingly, I actually did a couple weeks ago to ask about spring rates. Figured I'd wait patiently until I saw them go back in stock, but I'm getting itchy, haha.

Apparently the recommended ride height for XIDA GS is 5.75" pinch weld but they can be adjusted from 5.25"-6.5" and still be okay (what trade offs come with that deviation from the ideal ride height I don't know). I'm already at 4.75" pinch weld on my crappy MSM Bilstein/ Tein S.Tech setup and my car doesn't look like it's super low to the ground. I'd hate to raise the car up 1" just to run GS at their ideal ride height even though that's the XIDA version that's marketed towards my intended use (200tw street tires, occasional auto-x and HPDE).

Plus I already bought and installed a Racing Beat solid front .93" (15/16") sway bar and installed a stock 12mm rear sway bar based on old XIDA recommendations for 550/350 rates before they expanded the product line. Now, if I look at the SuperMiata site for my preferred ride height and intended usage, it would seem they're recommending the XIDA Race shocks with the 700/400 Sport spring setup and the Racing Beat Front Sway Bar 94-97 NA8 tubular front 1.125" - .125 wall (54105) sway bar and the MSM 14mm rear sway bar. What to do, what to do....

Since the valving is the same on either version of Xida it really comes down to your desired ride height more than usage. If you want it really high on Hoosiers then you will need Xida XL. If it's a daily driver on skinny All Seasons and you want to slam it then you run Xida Race.

Either version have an ideal working range listed on our website.

This is my 93LE on Aces with stock BBS rims. So same shock length as GS.
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That about the ride height we have the ACE's on Snoopy (white Club Sport) with 300/200 and stock bars. All but impossible to bottom, rides like a Lexus and ran 1:45's at Laguna Seca on 205 VR-1's with a passenger and blueprinted stock engine.

What are the tradeoffs associated with running GS at the bottom of the allowed range? What makes the nearly stock ride height ideal?

No tradeoffs, the recommended range is just that, recommended. It is not recommended to run below the range specified on our website simply because the shock may bottom too frequently.

The acceptable standard for bottoming resistance here at Supermiata is pretty strict. One should be able to drive on pretty rough roads at a good clip and not be concerned about frequent or harsh bottoming. The few times we have taken locals for test rides in our cars at the shop, they kinda freak at how fast we hit some big humps and dips. We think rally car. The point here is that most users will never run their cars that hard or are accustomed to frequent bottoming. Those users might be willing to drive a sub par setup. We aren't.

I had on the standard XIDA Race 700/400 before I swapped to the Ace's. They felt great on the street, just dealing with the big dip at the front of my driveway and speed bumps was super annoying.

It's nice to have options, isn't it? Our car is strictly a weekend toy and it rarely sees speed bumps, so clearance is not a major concern for us. I bet those Aces are fun to play with.

The time of ordering draws near. I noticed that stock sways are recommended for GS/XL/Ace. I have the FM front and stock rear bar currently installed. If I am lazy and don't pick up a front bar at the pick and pull, what bad thing will happen?

Also, is the GS basically the XL with the 550/350 springs but no helpers? If I'm going to be around 5.25/5.5 pinch height anyway, are the helpers going to do much for me? I found the old "who doesn't run helpers thread" and it seems the consensus was that anyone who drove a car with over 4.5" pinch height should kill themselves because race prep forum.

Stock sways recommended for maximum ride quality, since most XL/GS users aren't track rats. Your bars will be fine, as the FM front isn't a monster.
You get a lot of natural roll and pitch resistance from the higher ride height, which keeps the geometry in a happy zone.

GS are slightly de-contented XL. Standard grade, longer, main springs, tenders instead of active helpers, no torringtons, no BCMs.

Update on the Xida GS- despite the lack of high rate helpers, it still has quite a bit of droop travel. It completely ate up this giant mid corner dip in the road near my job that gives every other car I own fits. You have to slow down and correct for it, it's usually decently scary because the front of the car will lose traction and then regain it, followed by the rear. I didn't even realize I had gone over it until after I was past it. The moonscape textured highway on the way to work also got mostly soaked up. Admittedly this was only a few turns from full soft, but still not bad.

So far very impressed.