THE JUN WRX – Jun Auto Mechanic’s “Super Lemon GDB” Bugeye
This is the JUN Super Lemon GDB.
For a time this car broke and held the lap record at Tsukuba circuit in Japan –– right when the track was making a name for itself as the proving grounds for high-horsepower creations from Japan’s top tuners. The retina scorching signature “JUN lemon yellow” paint and GTR-faced original ADVAN RG’s belie the true legacy of this car.
It wasn’t so much that it broke the record at Tsukuba – it was the way that it did it, and the Subaru vs. Mitsubishi rivalry for Tsukuba supremacy that was going on at the time. With *only* 582 horsepower and all OEM metal paneled body, the JUN WRX posted a lap time of 55.9 seconds and snatched up the title from HKS’s Mitsubishi Evo VII (56.814 second lap on Dec. 26, 2001). JUN’s record was only taken away by the Sun Auto’s Cyber Evo (55.801 seconds on Dec. 9, 2003 via Eiiji “Tarzan” Yamada) — but it took an additional 200hp over the JUN car to do so. Ten days after Sun Auto took the record, the record was broken again by the HKS Evo TRB-02 (54.739 second lap – Dec 19, 2003 via Nob Taniguchi) — a car which essentially was HKS’s old Evo VII but entirely rebodied in super lightweight carbon fiber widebody that you’d be hard pressed to find on a street car.
A similar comparison can be made to the McLaren F1’s world’s fastest production street car title only being taken away by a certain car only with an additional 400bhp (not to mention four extra cylinders, and four more turbo’s than the McLaren’s zero). OK maybe I’m exaggerating ; ) But the JUN WRX is loved among bugeye enthusiasts.
Older pics from the now-defunct Exvitermini blog (the Aussies behind the 1400-hp drag Skyline GTR-700). Don’t mind the 2003 digicam technology : P
JUN’s original-design front bumper (modified for this car with narrower center air dam to feed the v-mount intercooler/radiator and nothing else), one-off custom CF splitter purpose-built only for the JUN GDB… known to scrape perfectly level pavement in hard turns : P
WRC-style sport mirrors likely made by STI for the GC8-chassis Impreza and adapted to the JUN GDB.
Stock WRX reflector headlights (lighter weight than the JDM projectors and stock on the STI Spec C) with JUN original-design eyelids. GTR-faced Advan RG’s housing giant Endless big brakes and Zeal Function-SPL coilovers.
Hood with custom-cut vents for the V-mount intercooler (not a WRC drop-in hood vent despite similar look)… and cowl by the windshield likely to vent heat from the massive turbo setup. The hood eventually received NACA vents (see last pic).
Custom turbo location against the firewall with meticulously welded titanium turbo inlet piping. Split intake manifold with two gigantic surgetanks atop a 2.5L JUN stroker kit on a 2.0L EJ207 (this was before the EJ257 existed). Dual-core V-mount intercooler setup. JUN’s trademark green-to-yellow fade painted timing belt cover.
You may have seen the video of the white JUN GC8 setting a top speed run. That car was owned by a customer, this car was owned by JUN itself and allowed the company to flex its engineering might and be even more creative.
SARD GT wing with custom covered mounts (not unlike the Mugen wing for RSX’s) mounted on the chassis itself as opposed to the trunk… and JDM STI rain visors. A nice “street car” touch on this track beast.
…and an enormous one-off rear diffuser purpose built for the JUN Car with integrated rear bumper vents. Closest thing you can buy for a bugeye outright is the Mature diffuser but even that is dwarfed by the JUN race piece.
Dr. Susumu Koyama – V.P. of Jun Auto, tuner and brains behind the JUN WRX. photocreds to super street mag
VEHICLE SUBARU IMPREZA GDB
ENGINE TYPE EJ25
BORE / STROKE 100mm / 79mm
TOTAL ENGINE DISP. 2482cc
COMPRESSION RATIO 8.1 : 1
MAX BOOST 1.6kg/cm2
MAX POWER 600ps / 7600rpm
MAX TORQUE 68.4kgm / 5400rpm
CAMSHAFT JUN High Lift Camshaft INT 272-10.3/ EXH 272-10.3mm
CAM SPROCKET JUN Slide camsprocket
VALVE SPRING JUN Racing valve spring
VALVE RETAINER JUN Titanium valve retainer
PISTON JUN Stroker kit 2.5L piston 100mm
CONNECTING ROD JUN Stroker kit 2.5L connecting rod
CRANKSHAFT JUN Stroker kit 2.5L crankshaft
TURBINE TRUST TD06 25G
BOOST CONTROLLER TRUST e-01
INTERCOOLER TRUST Twin core
OIL COOLER TRUST #16
INT MANIFOLD JUN Prototype 4 throttle surge tank
EXH MANIFOLD JUN Prototype
MUFFLER JUN Original titanium muffler
AIR CLEARNER K&N
RADIATOR JUN Aluminum V mount type
FUEL CONTROLLER F-CON V PRO
FUEL INJECTOR 1000cc
FUEL PUMP BOSCH
CLUTCH CUSCO Prototype twin
TRANSMISSION Stock 6speed
LSD F : CUSCO R : CUSCO RS 1WAY
BRAKE (F) ENDLESS 6POT 345mm Pad F&R MA11
TIRE ADVAN A-048 255/40-17
WHEEL ADVAN RG 9.5J-17(PCD 114.3 HUB) note: this car has multiple sets of Advan RG in different sizes… wheels shown looks more like an 18″
SUSPENSION ZEAL SUPER FUNCTION SPL F : 13k R : 16K
EYE LINE JUN eye line
FRONT BUMPER SPOILER JUN front bumper spoiler
REAR SPOILER SARD GT-WING
Keiichi Tsuchiya putting the JUN Car through the ringer and throwing it around the track for the Hot Version vol. 64 DVD
I promised more on this modded s202 from Minkara a few posts back belonging to Pikarin from Osaka, Japan. It packs a JUN 2.2L stroker for starters. I think this is my first J-spec subaru post as well! I’ve been on an S202 kick lately so a little background…
At 320 horsepower from the factory, the Subaru S202 was the first car to break the 276-horsepower restriction on all Japanese cars (ever notice why so many cars in Gran Turismo are “exactly” 276 hp) and paved the way for the ISF, GTR and other high horsepower creations to roll out of the island country. Every generation of Impreza has had a super limited edition sportscar model dubbed the S201 (classic GC8 ), S202 (bugeye GD), S203 (blobeye GD), S204 (hawkeye GD), and R205 (the new GRB).
The S202 essentially takes the stripped down racing model of the STI – the STI type RA spec C – and reloads it with high end sports car goodies: STI projector headlights (heavier but better looking), STI front mount oil cooler, bronze 17″ STI wheels made by RAYS (which bear a striking resemblance to RAYS Volk CE28N), chassis and brake upgrades, and a carbon fiber GT wing. Only 400 were ever made.
This guy modded an S202. He took Subaru’s ultimate bugeye and made it better, and more suited to his use for it as a weekend track car.
The metal bumper vent only on one side of the car may not be the prettiest but it is functional… behind it is a the GReddy front mount oil cooler (in addition to the STI factory front mount oil cooler that all S202′s come with), which vents air through the metal duct… pretty creative engineering.
The vents cut into the stock rear bumper (though they vary in appearance) – and the flip up rear license plate with vents behind it – are pretty standard faire on Japanese track cars. Both allow trapped air to escape the bumper and reduce drag.
The S202′s front-mount factory STI oil cooler switched positions with the intercooler.
And it gets tracked…
– JUN AUTO custom 2.2L stroker kit EX
– JUN AUTO pistons
– JUN AUTO oil pump
– Tomei valve springs
– Tomei cams
– Tomei timing belt reinforced belt guide
– Tomei exhaust manifold (headers)
– Ganador Full Titanium exhaust
– Cusco air intake hose
– HKS racing intake
– HKS twin power ignition amplifier
– Big throttle Racing shaft Baku Baku Factory (ばくばく工房 Big throttle Racing shaft)
– Power enterprise F1 black engine bearing
– SARD fuel collector tank
– SARD fuel injectors
– SARD fuel pressure regulator
– Laile (BeatRush) crank pulley
– Tomei baffle stiffiner plate
– ARC oil pan
– Kondo Engineering “3” all aluminum radiator
– Kondo Engineering tune for 2.2L motor
– Ecutek ECU
Turbo & Cooling
– IHI Turbo (machined)
– GReddy Type RS blow off valve
– GReddy Front Mount Intercooler SPEC-R (editor’s note: the SPEC-R is a different GReddy fmic than the smaller GReddy front mount that you see on U.S. WRX’s)
– earlier setup: ARC top mount intercooler and Prova High Pressure Bypass Valve (made by Forge)
– STI Oil Cooler (stock - OEM S202 Part)
– GReddy Oil Cooler (secondary… custom metal vent)
–PFC front three piece rotors for STI Brembos
–RDD rear 330mm three piece rotors for STI Brembos
–Endless EP357ME22 brake pads
–Endless CCR brake pads
–Prova carbon fiber brake cooling guide ducts
– Extended studs
– Hyperco HYPERCOIL coilovers
– Kondo Engineering Harmonic Drive
– Swift Hyperco Springs F 12k R 10k + 4k Hyperco spring assisted design
– Ikeya Formula roll center adjuster
– Cusco sway bars
– Okuyma floor braces
– Okuyama rear seat delete plate
– J Speed rear seat delete plate reinforcement braces (editors note: there’s a brace for everything :O)
– J Speed multi-piece fender braces
– Beatrush rear strut and trunk braces
– Beatrush floor brace
– STI titanium front strut bar (stock - OEM S202 Part)
– STI lateral links and trailing arms (stock - OEM S202 Part)
Wheel & Tire
– Bridgestone Potenza RE-11 tires
– STI wheels by RAYS
– RAYS Volk Racing CE28N (black) 17×9 +43
– RAYS Volk Racing RE30 (black) 17×9 +43
– Ganador SuperMirrors
– STI version 1 lip w/ factory STI unpainted/flat black option
– STI mesh fog covers – unpainted.
– STI projector headlights (stock - OEM S202 Part)
– STI roof vent (stock - OEM S202 Part)
– STI S202 carbon fiber wing (stock - OEM S202 Part)
– Monster Sport carbon trunk
– Monster Sport carbon hood with drop-in hood vent — also custom vented over the turbo.
– hood pins
– Stage 21 custom vented fenders – 20mm wider than stock