Machine Check: Full Stage – Hiroyuki Iiri’s 3-Rotor NA FD3S

A few years ago, when Osaka native Ryosuke “Ton” listed his former NA record holding EG6 for sale, it didn’t take long for his close friend and neighbor, Hiroyuki, to follow suit by putting his naturally aspirated three-rotor FD on the market as well.  This was back in 2024, and it had even been a few years prior that we saw him out competing in the FD.  After a year or so, the rumor of the sale began to fade, and to be quite honest, I didn’t really know what had happened to the car. I know that in 2025, Takumi, of Workshop Takumi, (aka Carbon Junkie) had recently completed a new bespoke carbon widebody for the FD that did wonders to modernize the somewhat outdated look of the matte black 7.  Other than that, and a single test day at Central, nothing was really publicized of the build.  Seeing as how I was going to be in Kansai, I figured I would reach out to Hiroyuki to see if he still in fact owned the car.  It turns out, that the FD that once held the title of fastest overall NA at both TC2000 and Central, was still very much around and in his possession.  Iiri told me that the car has residency at Full Stage, and that I was more than welcome to shoot it, so I got in touch with Nakanishi, the owner of Full Stage, to schedule a good time to meet.

When I arrived at the shop, the FD sat out front, freshly cleaned, no longer wearing the layer of dust that usually comes with years of storage. It started up without hesitation, and Nakanishi took it over to a vacant lot where he stores the loader.  It’s always a challenge finding a location to shoot in neighborhoods. You have to strike some sort of balance between an open, interesting area, and not being a nuisance to the public in the surrounding area. As you can imagine, the majority of people see these cars in a different light than us. With the car out in the open, I was able to get a better picture of just how much the new widebody transformed the look.

Be sure to check the short feature video out before viewing the gallery.

The chassis, which was based on a RE Amemiya build, has remained unchanged, but is now clad in the dry carbon dress of Takumi’s widebody.  The new aero features a stylish front fender with more contemporary venting, with a sweeping rear over which is vented in a similar fashion to his previous kit.  The look of the new kit is much sharper than the 2020 spec, which was a bit more DIY in it’s aerodynamics package.  Especially considering both the front and rear aero package has been revised to flow tested parts, with the new ducted rear diffuser extending the rear of the car an additional 500mm, matching the swept back angle of the Voltex GT wing.  The RE hood, and carbon rear gate keep the overall package cohesive and lightweight, the perfect fit for circuit driving.  At just under 1,030kg, the chassis paired with the high revving NA 20B, emphasizes response and driving clarity over giant power numbers.

The 20B, built by Nakanishi himself at Full Stage, is a peripheral ported 3-rotor that outputs about 400ps (398 to be exact). The custom upper intake manifolds have been converted to individual throttles, all managed by a Motec M1 ECU complete with dash and data logging.  The engine has been mated to an OS Giken sequential transmission with shift cut, and delivers power through the solid mounted OS Super Lock LSD.  Rest assured there is nothing comfortable about this car – it was built for a single purpose., and it does that single purpose very well.

Suspension is handled by Spirit Shocks’ ‘Shark’ spec dampers, developed in collaboration with Hiroyuki himself and paired with HAL springs.  The setup reflects years of circuit refinement, prioritizing balance, feedback, and consistency over peak grip, and ties together a package built with lap time and drivability firmly in mind. I would be remised if I didn’t point out the very appropriate ride height for this car, and how important a role it plays in how it makes the build appear. If this car had any higher of a ride height, it wouldn’t be nearly as good looking. The dampers have been refined to handle to updated loads that the new aero produces. Hiding behind the 18×11 TE37 are a set of MONO 6 and MONO 4 Endless brakes, complete with two piece rotors.

The overall build is reminiscent of the same, naturally aspirated 20B powered GT300 car that he took the 2006 Super GT championship in with his team mate Tetsuya Yamano – allowing Hiroyuki to relive those days any time he gets behind the wheel.

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2 Comments

  1. blaknwhites

    One of my favorite builds! The 3 rotor start up is so menacing!

  2. the new front end definitely suits the rest of the chassis’ bodylines and shape overall

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