We’ve all received ‘em – movies that sparked our love for vehicles or channelled our pursuits in a specific path.
I may title a couple of, however one which stands out is a 21-second clip of a shiny yellow MkIV Toyota Supra constructed by JUN, power-sliding at Tsukuba Circuit. I’m unsure the place I first noticed it on-line, however in 2001 – 4 years earlier than YouTube was a factor – you’ll be able to wager I risked the prospect of 25 to life by downloading the bootlegged clip.
Fortunately, you don’t need to.
So think about my pleasure, when a couple of years later, I caught a glimpse of what seemed to be that exact same automobile parked in a gravel lot throughout the highway from JUN’s Iruma store.
What I didn’t know on the time was that this was the identical Supra that had graced the covers of Max Energy and Tremendous Road magazines in late 2001, with a considerably totally different outward look. A Supra that had reached the mind-numbing prime pace of 401.20km/h (249.292mph) on the Bonneville Salt Flats in Utah, USA.
How did I find yourself right here? Again in 1999, I met JUN Auto Mechanic head Susumu ‘God Hand’ Koyama in New Zealand when he travelled right here to compete within the Choice Velocity Trial with the JUN Tremendous Impreza GC8 – a 580ps (572hp) beast that hit 309.1 km/h on a protracted and straight however bumpy and moist backroad. I knew I needed to go to JUN, and in 2004, I got here to Japan and was capable of make it occur.
Greater than 20 years later, I’m nonetheless humbled to have obtained private excursions of JUN’s Nerima store in Tokyo and JUN Auto Works/Auto Mechanic in Saitama from the corporate’s founder, Junichi Tanaka.
I didn’t get to spend a lot time with the Supra – it was the tip of the day, and I had a prepare to catch again to Tokyo. However I used to be fortunate sufficient to get the automobile moved into a bit of open area within the car parking zone for a couple of photographs.
JUN was based in 1980, however its mum or dad firm’s historical past dates again to 1946. After World Conflict II, Tanaka-san’s father based Tanaka Industrial Co., repurposing equipment used for Japanese warplanes for automotive purposes. For his entry into Japan’s efficiency automobile tuning business, Tanaka-san employed Koyama-san, a proficient younger mechanic, to move up operations, and JUN as we all know it was born.
The most recent turbocharger expertise was the center of JUN’s operations, and the corporate shortly constructed a reputation for itself by constructing a few of Japan’s quickest and strongest vehicles. Tuning automobile top-speed trials held on the now defunct Yatabe Take a look at Observe by Choice journal within the ’80s grew to become an early focus for Koyama-san. Then, in 1990, he took JUN to the worldwide stage with a number of appearances at Bonneville in numerous vehicles. In 2001, JUN returned to the salt flats with its ‘Akira Supra’ – a demo automobile construct began three years earlier from a inventory 1993 Toyota Supra RZ.
Not like most vehicles in Bonneville’s 200mph Membership, JUN’s Supra wasn’t a purpose-built, tube-framed race automobile. It was a modified road automobile with some further go-fast bits added (and eliminated) to permit it to succeed in 400km/h – a quantity Koyama-san had seen on the salt with earlier builds.
Across the identical time JUN was within the USA with the Akira Supra, the bootlegged clip of the automobile power-sliding at Tsukuba made its method on-line, now identified to have been ripped from Video Choice Vol. 76, which got here out in 2000. Pondering again, this might need been the very first ‘viral’ video to emerge from Japan’s tuning scene, which was nonetheless largely a thriller on the time.
Fortunately, Choice formally uploaded the total three-minute phase to YouTube a couple of years in the past, so you’ll be able to watch that by urgent the play button above. Because it seems, the Akira Supra had been delivered to Tsukuba to see how briskly it may lap the circuit, and on a warm-down lap, Choice check driver Eiji ‘Tarzan’ Yamada determined to have some enjoyable…
Not lengthy after I first noticed the power-slide clip, a pal loaned me a Video Choice VHS tape from, I’m guessing, round 2000 too. Within the grainy footage, the Akira Supra was filmed ripping by way of the gears alongside the Tokyo Aqualine at over 300km/h – the Wangan benchmark of the golden period. It simply received higher.
Even earlier than I knew of its Bonneville exploits, the Akira Supra embodied all the things wonderful in regards to the Japanese tuning scene on the time. It was a road automobile that would hit 300 km/h with ease and drift. It had a 2JZ-GTE engine constructed as much as 3.2L with JUN prototype elements – solid crankshaft, solid rods and pistons, efficiency cams – and a T88 turbo. Gear shifts had been made by way of a sequential gearbox, virtually extraordinary in road vehicles, and it was unmistakably a JUN creation with useful exterior mods and that signature yellow paint.
For the Bonneville try, the 2JZ engine was fully overhauled. Along with strengthening and modifying the engine base for extra energy, Koyama-san added twin Belief/GReddy SPL T78-29D-14cm turbos, a prototype JUN consumption manifold, and a gas system as much as the duty. That system included a 120L tank, 5 Bosch Motorsport gas pumps, and a dozen JUN 890cc injectors. Tuned by way of an HKS F-CON V Professional engine administration system, the setup made almost 1,400ps (1,380hp).
The driveline retained the identical 6-speed Holinger sequential gearbox it had beforehand been fitted with, however a 2.238:1 ultimate drive ratio was used within the rear finish to make sure the Supra may mechanically hit 400 km/h. Mixed with its aerodynamic modifications and a full flat metal underbody tray, the Supra averaged 240.192mph (386.55 km/h) over two runs within the E/BGCC class. Hitting 401.20km/h on one of many runs is what it’s remembered for although.
When it returned from Bonneville, the Akira Supra was transformed again to its road automobile setup, with a single Belief/GReddy T88-34D-22cm turbo, a milder cylinder head specification, a pared-back gas system, and a extra road-friendly diff ratio. On this type, the facility output was as much as 950ps (937hp), operating round 1.7bar (25psi) of enhance. That’s the spec you see right here.
The road model of the Akira Supra – JUN’s unique search for the automobile – completely mirrored the late-’90s/early-’00s Japanese tuner model. The entrance bumper, vented and bulged hood, aero mirrors, and GT wing had been all JUN elements, whereas the rear diffuser was a RE Amemiya piece. Finishing the imaginative and prescient had been gold 18-inch Advan Mannequin 6 wheels – the identical ones used at Bonneville – wrapped in Yokohama Advan semi-slicks.
For the reason that Supra hadn’t been lower up in its transition from highway automobile to salt flats racer, it was simple for JUN to return it to street-spec. Regardless of its race upgrades, like a welded Cusco 10-point roll cage and a Recaro SPG seat, it benefited from some comforts, equivalent to a full sprint, entrance carpet, and door playing cards. Additionally stored in place was the originally-fitted suite of GReddy gauges, plus its then-state-of-the-art Stack 8100 digital sprint show.
Within the years following my 2004 encounter with the Akira Supra, nothing a lot was heard in regards to the automobile, so I assume it spent extra time parked up within the lot. Then, in 2011, JUN gave the Supra a full overhaul – repainting it silver with new yellow and orange graphics and refreshing the powertrain for circuit use.
Two years later, in early 2013, JUN put the automobile on the market, but it surely took till late 2014 for a purchase order to be made. That looks as if a very long time given the asking value, which you would possibly wish to sit down for: ¥6,000,000 earlier than tax – that’s simply US$40,000 in at this time’s cash.
I’d like to know the place the Supra ended up. There’s on-line chatter that mentions Australia, however I can’t affirm it. Hopefully somebody on the market can shed some gentle on its location and present type.
One factor’s for positive: of all of the tuner vehicles in-built Japan over time, JUN’s Supra would possibly simply be the best. It was an all-rounder like no different.
Sadly, Tanaka-san handed away in 2019, aged 76, after an sickness, and Koyama-san, who had battled sickness for years, handed away in 2022, having gone on to discovered Koyama Racing Labo in 2009/2010. Whereas these icons of Japanese efficiency tuning are sadly gone, JUN’s legacy will stay on without end by way of vehicles just like the legendary Akira Supra.
Brad Lord
Instagram: speedhunters_brad
