8700 RPM V8 GT86 Build | 6-Speed Sequential 450HP 1UZFE [TECH TOUR]
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NA, supercharged, turbocharged and then V8 swapped, this Toyota ‘HPA86’ has seen its fair share of spanners over the last few years.
With essentially a ‘stock car spec’ 450HP Toyota 1UZFE V8 under the hood and the core modifications done before our ownership, the HPA GT86 has an ever-growing list of parts and ‘to-do’s’ in order to build it into a class-competitive car, and also the team's skills along with it. In the previous owners hands the car saw its stock FA20 power plant supercharged, then turbocharged, and finally removed and replaced with a stock 4L 1UZFE V8 engine with an R154 5 speed transmission fitted behind it.
300HP wasn’t quite enough though, and it later received a modified 1UZFE which has the VVTi system removed in favour of a CNC ported head, more aggressive cams and valves to match, stronger H beam connecting rods and a GM LS V8 intake manifold. Stock pistons and a 10:1 compression ratio were retained in relation to the specs the 1UZ’s used in stock car racing adhere to just for ease of purchase etc for the previous owner and also leaving the car able to run on pump gasoline.
Electronics were fitted by HPA some time ago, and include a MoTeC ECU with the Toyota 86 engine swap package, meaning all factory subsystems are retained and in use. Due to this car being street legal this was a requirement, and although we have taken things further in the last 12 months the car is still actually close to road legal with namely the aero and TTi GTO 6 speed sequential gearbox either needing paperwork or removal to turn this back into a ‘grocery getter’.
Plans are underway to partner with Hartley Engines and Motorsport to once again update this chassis powerplant with a 3UZFE based build, giving us a little extra capacity and power without there being too much for the current tyre size to cope with.
Parts list
A couple of Toyota GT86 bits...plus the following.
Engine:
450HP Toyota 1UZFE V8 - Details above
Custom 3 stage dry sump setup
CNC ported heads
Manley rods
Setrab oil cooler
Gearbox:
TTi GTO 6 Speed Sequential
Motorsport Systems strain gauge gear lever
Tilton Twin Plate clutch
Tilton hydraulic release bearing
Chromoly Flywheel
Gearbox cooler: Mocal oil pump, Setrab cooler
Fuel:
Injector Dynamics ID1050X injectors
Radium Engineering in tank fuel surge hanger x 2
DW300 fuel pump x 4
Radium Engineering multi-pump surge tank
Driveline:
Cusco diff cover and -6 breather
Cusco LSD with 4.556 final drive
Differential oil cooling system with Mocal pump and Setrab cooler
DSS 800HP axles (We have had MAJOR issues with DSS 1000HP axles. More here: • The Truth About Driveshaft Shop, Seco... )
In-house solid diff bushes
Suspension:
RaceFab suspension arm and trailing arms
MCA Suspension ‘Reds’
MCA Suspension Traction Mod Mount
Stock Lower Control Arms With Whiteline Bushes
Whiteline Anti-roll bars front and rear
Parts Shop MAX hubs front and rear
Parts Shop MAX upper rear control arms and tension arms
Brakes, Wheels and Tyres (aka Tires 😉):
Izze Racing TTPMS (Tyre monitoring system)
Endless Brake pads, calipers and rotors
WedsSport TC105N Wheels
Michelin Medium Compound Slicks 24/64 R17
Hankook Wet Weathers
Aero:
Barry RaceWorks ‘Ghetto’ aero package with ‘eBay special’ rear wang
Safety:
6 point roll cage with side intrusion bars
RaceTech seats, floor and cage mounted
Schroth Profi 2x2 harness
Electronics:
MoTeC C125 dash display and data logger
MoTeC M150 ECU - Toyota 86 ‘Engine Swap’ package
MoTeC T2 Telemetry system
EcuMaster PMU
Driver Control Setup - In- house with EcuMaster CAN Switch Board
Misc:
Speedflow AN Fittings - care of GSS Performance
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