Koyama fitted an 80-liter ATL fuel cell, a requirement when building a car for an endurance race like the Macao Grand Prix. Koyama has yet to put the EVO on a dyno to measure the figures, but if he had to make a wild guess he would expect the engine to deliver more than 600 hp and somewhere in the region of 485 ft-lbs with excellent midrange torque. To help handle all that power, an ORC twin-plate clutch was fitted along with a modified version of the stock Mitsubishi 5-speed transmission, featuring an NTS micro-finish-coated gearset and a special KRL shorter fifth gear to help the car get the most out of short to medium circuits in Japan. Upgraded ATS carbon LSDs fore and aft take care of distributing proper torque to each of the four wheels.
Seeing Suenaga drive the EVO around the Higashi course at Ebisu was quite a sight as he came up the main straight well over 124 mph, a pretty incredible speed to achieve on the tough uphill straight. Even Kumakubo showed up for a quick drive to sample Koyama's creation. His comment after a few laps, "This car is scary fast!" If a guy that's used to going sideways at 112 mph says something like that, you know it's an impressive car. This is, without a doubt, another great car from one of the greatest JDM tuning gurus out there.
Specs & Details
'08 Koyama Racing Labo
Mitsubishi Evo X
Max Power 600 PS
Max Torque 67 kgm
Engine Mitsubishi 4B11T inline-4
Engine Modifications KRL 86.5mm forged pistons, H-section connecting rods, stroker crankshaft for 2,281cc, 1.2mm metal head gasket, performance camshafts, adjustable cam pulleys, cam belt, lightweight water pump pulley, lightweight alternator pulley, carbon-fiber airbox and filter system; NTS micro polished ported head, Blitz custom exhaust manifold, Type J external wastegate, Type J V-mount intercooler, oil cooler; Koyo racing radiator, Blitz/KRL prototype turbocharger, KRL custom exhaust manifold cooling air guide, front pipe, exhaust system, intercooler piping, custom intercooler end tanks; Samco silicon intake hose, NAPREC 80mm mechanical throttle, NTS aluminium billet intake plenum, Sard fuel pump, fuel pressure regulator, 1,000cc injectors, air-separator system; KRL/NTS/Team Orange purple engine cam cover
Engine Management KRL original ROM flash ECU, HKS F-Con V Pro piggyback ECU
Drivetrain ORC special twin plate clutch and lightweight flywheel, NTS micro-finished gearset, KRL original 0.82 fifth gear, ATS carbon LSD (f/r)
Suspension Zeal Super Function Type-E adjustable dampers w/ remote piggyback tanks, 13 kg/mm springs (f), 15 kg/mm (r), KRL prototype adjustable suspension links
Wheels, Tires & Brakes Enkei Sport RC-T4 18x9.5" +30; Hankook Ventus TD tires 285/30/ZR18; Endless Racing 6-pot monoblock calipers (f), 4-pot monoblock calipers (r), 2-piece e-slotted 380mm rotors (f), 2-piece e-slotted 330mm rotors (r), Endless Special brake pads