Here’s the basic spec of the car.
It all started as a road going Wrx around 7 years ago. After doing a couple of track days in this mildly tuned Wrx I caught the bug. Eventually the inevitable happened and I spun a bearing through lack of adequate oil control measures, this forced me to start building a new engine for it.
Out came the coffee table and I began the process of building up a new engine package. Once complete I had a few great months on the road with a healthy 550bhp, it was great fun. From there on out we started with the gearbox issues, shredding teeth and various internal components.
It was at this point a friend had said to me, ‘why don’t you enter into time attack with the cad and see how you get on.’
That where everything properly started and the car has evolved from there, engine lasted really well, gearboxes not so much, going through 9 in a 3 year period!
Throughout the entire process I’ve been teaching myself all the various processes involved and making a few mistakes here and there but overall it’s gone really well. Everything is done in the shed at home by myself, from engine or gearbox building to the composite panel manufacture and even the ecu calibrations. It’s like a full time job in itself but highly rewarding when we achieve the results with it. I’ve managed to set many club lap records with the car over the last few years and win some championships with the car.
Anyway, that’s probably enough talking, here’s the spec as of 2023 and some pictures.
The power is currently sat around the 700bhp mark in peak calibrations and around the 600-620 lb ft torque area.
Weight wise, the car sits at 1190kg without the driver.
Engine
Ej20 Uk sti 2.0 closed deck block
Ej257 Uk 2.5 nitrile treated 79mm crankshaft
Smg ported Uk small port heads
Supertech buckets and shims
Carrillo steel rods
wmc rod bolts
MAHLE main and rod bearings
MAHLE 2618 93 mm stroker pistons
Rotating assembly balanced to within 0.1g
Rcm 0.78mm head gaskets
11mm oem Subaru oil pump
Killer b super g sump & windage tray & pick up
Killer b oil control valve
Supertech inconnel exhaust valves
Factory Subaru inlet valves
Gfb billet crank pulley
Custom front mount headers (heatwrapped)
Perrin 4 bar map sensor
Custom ported tgv deletes
K&n 4” air filter
Japspeed front mount intercooler
Custom 2.5” boost pipes
Roose motorsport custom nomex lined 7 ply silicone couplers
Wiggins coupler from the turbo to intercooler connection
Tial q50 atmospheric blow off valve
GFB EX44 wastegate, recirculated into downpipe
G35-900 pulsar turbo 0.83 vband in and out
AN lines throughout feeding the turbo with oil and coolant and the oil breather system
Mac 3 port boost control solenoid
Custom 3” stainless downpipe & mid section
Japspeed modified 3” stainless rear exhaust system
3 quart canton racing accusump
Mocal thermostatically controlled 13 row external oil cooler kit
G plus silicone coolant hoses throughout
Heavy duty mikalor t bolt boost hose clamps
Titanium Turbo heat blanket
2 litre obp oil catch can vented to atmosphere
Electrics
Syvecs s6+ pnp Ecu
Oil pressure, fuel pressure, accusump pressure and onboard wideband and egt’s amongst all the factory sensors scaled and logging within the ecu
Wrx converted loom to run avcs
Mapped by Myself
Switchable Anti lag
Switchable map x6
Launch control (builds around 1.6 bar stationary)
Exide xlt20h lithium battery
Isolation switch
Race technologies dash 2 pro wired to all oem sensors and scaled to suit, includes alarms and data logging of all input sensors and gps tracking and lap timing all built in.
Pre intercooler temp gauge on the centre console AEM x series wideband gauge
Push to pass button the steering wheel (adds around 100bhp)
Drivetrain
Jdm short ratio 1:1 transfer gear 6 speed gearbox
3.9 ratio jdm rear differential
Custom Böhler s155 300M category steel rear drive shaft bars
Xtreme twin 6 puck plate 230mm unsprung clutch kit
Custom t45 tubular gearbox cradle mount
Fuji motorsport centre prop billet mounts
Perrin rear subframe lockdown kit and diff mount and cradle poly bush kit
Perrin shifter positive shift poly bush kit
13:1 Hawkeye spec c quick steering rack & subframe
Custom modified oem front lower control arms
Exterior
Seam welded shell
Tubbed front wheel arches
Carbon fibre kevlar reinforced roof
Carbon fibre rear quarters and custom 40mm abw rear arch kit
Japspeed carbon Bgw with custom carbon supports and end plates
Fuel filler relocated to rear bumper
Custom front end to allow front mounting of the turbo unit
Custom carbon fibre front wings recessed and widened 40mm
Carbon fibre 1 piece rear doors, kevlar reinforced
Polycarbonate 4mm rear window
Ricky evans motorsport heated front windscreen
Single wiper
Wrc carbon side mirrors
Carbon front doors with kevlar reinforcement
Polycarbonate front windows with slider in drivers side
Carbon bonnet scoop
Custom carbon front bumper with 40mm carbon extensions
Carbon kevlar intercooler ducting
Carbon kevlar 12mm front splitter with carbon built in aero tunnels
Carbon splitter support rods
Carbon kevlar splitter aero tunnels
Carbon rear rain light mount
Cartek time attack rain light
Bonnet vents & aero catches to secure
Custom carbon side skirts
Wheels
2 forge zf5 18” x 10J et20 5x100 in gloss black
Pirelli Trofeo r 295/30/18 tyres
Fuel system
Custom modified oem Half size fuel tank (30 litres)
Aeromotive 340lph in tank lift pump
2 litre custom turn 12 fabrications undercar mounted surge tank
Twin Bosch 044 external fuel pumps & cradle
AN-8 ptfe steel overbraid fuel supply line
An-6 ptfe steel overbraid fuel return line
Billet torques high flow fuel rails
Bosch motorsport ID1700XDS injectors
Rcm adjustable fuel pressure regulator
Surge tank inline pre filter 100 micron
In bay radium 6 micron in-line an-8 microglass fuel filter
Interior
Custom cages T45 international multi point weld in Roll cage
Mirco r2s seat
Fixed side mount seat mounts on Gsm rail
Trs 6 point HANS harness
Foam 2.25l handheld fire extinguisher
Race technologies Dash 2 Pro dashboard with custom carbon binnacle switch plate & mount
Carbon kevlar boot floor
Parcel shelf frame delete
Lightened in various locations & holes strengthened using dimple dies
Driftworks basics dished suade 350mm steering wheel and slimline alloy mounting boss
Brakes
K sport monoblock 356mm 8 pot brake kit with floating rotors at the front
K sport 330mm 4 pot brake kit at the rear
Pagid Rst3 brake pads front and rear
Braided hoses front and rear
Oem brake booster
Abs disabled
RBF 660 brake fluid
Suspension
BC ZR series 3 way adjustable coilover suspension in 14kg/mm front and 12kg/mm rear spring rates
Hardrace rear lateral and adjustable control arm sets with spherical bearings throughout
Hardrace spherical front control arm rear mounts
Whiteline 27mm front antiroll bar with spherical drop links
Whiteline 24mm rear anti roll bar
Whiteline rear heavy duty billet anti roll bar chassis mounts
Hardrace bump steer correction track rod ends Hardrace bump steer correction ball joints
Check out Sam's Instagram for more pictures and the amazing work he has done to this car.
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