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AirRex Honda S2000 - The Unsprung Hero

Making waves in the motorsports world with air, not coils

Jamie Arkle
Jun 22, 2016
Photographer: Courtesy of AirRex

Building a race car is all about extremes - essentially going further than you'd ever be able to with a road-going vehicle, and turning everything up to 11 in order to wring every last ounce of potential performance. This simple formula has given us some wild, flame-belching beasts built solely to clip apexes, draft past opponents, and pound around perfectly smooth asphalt lap after lap, after lap. The extreme nature of race cars (coupled with the fact the world has been racing automobiles for over a century) means that the basic rules governing what a race car should and shouldn't have are well documented, and nowhere does this ring truer than when discussing suspension. Over the years the basic design has been expanded and refined, but the basic rule remains the same: if you want to go racing, you need a traditional, coilover suspension to make it happen.

Airrex honda s2000 custom race front bumper Photo 2/19   |   Airrex Honda S2000 Custom Race Front Bumper

The paragraph above should give you some idea as to why the S2000 you see before you is such a game changer. In fact, it's more than a game changer, it's a third way, a different approach to racing and a thorn in the side of the establishment. And the reason for all of this upset? It's running AirRex air suspension rather than springs or coilovers, and perhaps most surprising: it's ultra-competitive.

Airrex honda s2000 airrex digital air suspension system Photo 3/19   |   Airrex Honda S2000 Airrex Digital Air Suspension System

"I'm the owner and manager of AirRex, so of course I'm keen to showcase the capabilities of my products wherever I can," explains the car's owner and driver, Dizzy Lin. "That being said, the decision to utilize our own air suspension when constructing the race car as was much about proving the merits of the setup as it was about promotion, and I always believed an air-shod car could be an on-track success."

So how do you go about turning an air-shod S2000 into a race car capable of bloodying the noses of the great and the good of the motorsport community? The answer, of course, is countless hour's worth of work, skinned knuckles, grazed knees, extended MIG welder and angle grinder sessions - and math. Lots and lots of math! The actual prep work was undertaken by the rather comically named "Oh F**k Performance," a team of race car builders with a sterling reputation in China, so the ideal group of people to undertake such a leftfield project. One of the principle issues the team had to overcome was how to make the air suspension setup stiff enough for motorsport use. While very much a known quantity when discussing the regular, coil spring setups that can be found beneath the wings of race cars the world over, the complete opposite was true of air bags and compressors.

Airrex honda s2000 custom race front bumper Photo 7/19   |   Airrex Honda S2000 Custom Race Front Bumper

"I can't give away too much information on the specifics of the setup as it's key to our on track performance and I don't want to divulge a hard-fought advantage, but believe me when I say that everyone else at Oh F**k Performance spent a long, long time developing a series of braces to put enough rigidity into the air setup," enthuses Dizzy.

Airrex honda s2000 viair compressor Photo 8/19   |   Airrex Honda S2000 Viair Compressor

Though the supporting chassis work, bracings and mounts are all custom, the actual AirRex kit now found on Dizzy's S2000 is remarkably similar to the one you could go and buy for your very own road-going car. Yes, a number of fittings have been uprated in order for them to be able to withstand the pressures and stresses professional racing entails, but in essence it's the same publicly available combination of compressors, rams, and reinforced bags. All concerned were keen to retain as much of the original kit's core functionality as possible, partly as an experiment to see how far everyday components could be pushed, and partly as a marketing exercise; i.e, proving that AirRex's hardware can take the extreme forces associated with motorsport with relative ease. As a bonus, driving home the fact that "airing out" a sports car doesn't necessarily mean having to trade in pinpoint handling.

Airrex honda s2000 airrex air strut Photo 9/19   |   Airrex Honda S2000 Airrex Air Strut

"I'll admit that even I was a little skeptical about the team's ability to recreate the sharpness, feel, and sheer responsiveness that you get with springs and dampers," explains Dizzy, adding, "but it's clear that I really had no need to be worried; the car handles perfectly! It's every bit as focused as it was when fitted with conventional suspension, and perhaps a little better in certain driving situations."

The bags aren't the only thing helping Dizzy's S2000 stick to the track. They receive help from a battery of aftermarket chassis hardware tricks, including Swift anti-roll bars, Buddy Club rear camber arms and a complete set of Mugen bushings. Along with the extra braces added during the fabrication process, these imbue the bags and rams with the added strength and stiffness they need to do their job while hammering round a race track.

Airrex honda s2000 custom race front bumper Photo 13/19   |   Airrex Honda S2000 Custom Race Front Bumper

Other elements of the build are more conventional, though no less interesting or effective. The S2000's trump card has always been its power plant - that charismatic, high-revving workhorse willing to scream itself into a frenzy, and therefore more than suited to racing. Dizzy's worked hard to build upon what Honda gave him in this respect, fitting a TODA race header, Pipercross induction kit, and a J's Racing exhaust system, before leaving the whole setup in the capable hands of a MoTeC management system. Not only has that little lot gifted the S2000 with an appreciable hike in performance, they've made the already loud VTEC crossover even more vocal, to the point where it just conforms to the regulations governing noise pollution at the various circuits Dizzy competes at.

"It's loud, yes," laughs Dizzy with a shrug. "The thing is though, what's the point in having a tame, quiet race car? They're meant to be a bit crazy, very fast, and even louder."

Airrex honda s2000 honda s2000 interior Photo 14/19   |   Airrex Honda S2000 Honda S2000 Interior

Dizzy's made sure to get as much use as possible from his car since it was completed, and it's since become a regular (and no doubt welcome) sight at race meetings across China, including the TTCC, Super TTCC, OTGP and TSSL, all respected domestic series. There's more to this car than mere race wins though, and it's hard to get around the fact that its most remarkable aspect is the air setup it relies on. We don't know about you, but we're glad this car exists, if nothing else because it's effectively a giant, two-fingered salute to the established way of going motor racing.

Airrex honda s2000 custom race front bumper Photo 15/19   |   Airrex Honda S2000 Custom Race Front Bumper
Airrex honda s2000 custom race front bumper Photo 19/19   |   Airrex Honda S2000 Custom Race Front Bumper

Sources

By Jamie Arkle
1 Articles
AirRex Honda S2000 - The Unsprung Hero
Tuning Menu
Engine: F20C; Pipercross Performance air filter; TODA Racing Header; J's Racing stainless exhaust; Okada Project ignition coils; Mugen sump; GReddy oil cooler; custom radiator; ASM catch can; Moroso catch can; MoTeC engine management system
Drivetrain: Exedy Hyper single clutch and flywheel; Carbonetics 1.5 way diff
Suspension: AirREX Digital air suspension system (Custom racing spec), Swift anti roll bars, Mugen bushings, Buddy club racing front/rear RCA, Spoon sports X-brace, AP Racing 5000+ pro brakes, J.C brake pads, Goodridge line
Wheels & Tires: Buddy club P-1 17x9.0in +45Front/rear, Kumho S700 240/610/17
Exterior: Custom race front bumper; GT wing; ASM rear flares; Seibon carbon fiber hood; Spoon Sports Mooncraft hard top
Interior: RAEMCO FIA racing seat, multi-point harness; OMP steering wheel; ARC eggplant shift knob

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