roger-clarke-front-impreza

Roger Clark Motorsport

Roger Clark Motorsport

Subaru Impreza as modified by Roger Clark Motorsport. This is based on an article which appeared in EVO Magazine in October 2005, written by Phil Royle

Introduction

 

The Roger Clark Motorsport Subaru Impreza WRX STi is fully road legal even though the car lays claim to the following figures. 9.84secs 1/4 mile @ 143mph, its 2 litre engine develops
709bhp@7500rpm and 620lbs/ft even without the use of its 150bhp nitrous oxide system.

Roger Clark Motorsport Impreza

 

The car is built up from a bare shell, where a roll cage is installed, Kevlar bucket seats, MOTEC LCD data display, Nitrous Oxide System, Ohlins coil over dampers with remote reservoirs, a bespoke AP Racing big brake kit, Lightweight OZ Superleggeras to name just a handful of the performance parts used.

roger-clarke-front-impreza

Engine

The bottom end in the Roger Clark Subaru Impreza is a forged steel item, the rods are elongated and connect to custom spec pistons, the cylinder heads are ported and polished and are installed with WRC titanium valve gear and suitably extreme camshafts. Fuelling is taken care of by a custom fuel cell from which 2 pumps draw fuel with the petrol being forced into the engine through 8 injectors. The inlet manifold is the exact same design as that found on the WRC Subaru Impreza, this is fed from short, lag free hard pipes leading from a massive front mounted intercooler with water spray.

 


Turbo

This Subaru Impreza uses a Garrett GT3040 turbo with features state of the art ball bearing technology and is mount mounted on a bespoke twisted exhaust manifold with an external waste gate with the exhaust gases exiting through a custom de catted exhaust system.  The whole engine is managed by MOTEC electronics with all the mapping having been carried out by Roger Clark Motorsport themselves.

02_EVO_084_059Transmission

To cope with the mega output of this Impreza engine, the Subaru transmission is totally overhauled with a Modena 6 speed dog box with straight cut gears, high grade clutch, lightweight flywheel, carbon fibre prop shaft, plated LSD and an electronic diff control.

Driving the Monster

The Roger Clark Subaru Impreza retains its flat four rumble, blip the throttle and the revs rise and fall rapidly, smoothly and deafeningly. Engaging the clutch and burying the throttle results in unbelievable acceleration which leaves your body left to fight the crushing G Forces, each new gear unveiling another slug of acceleration. And all this from a 2 litre engine. Price for this conversion is on request.

Links

Roger Clark Motorsport


Forums

SIDC
ScoobyNet
ScoobyMods

 

For insurance quotes see the High Performance Car Insurance section

Redline mini feature of the Roger Clark Motorsport built Team Ice Subaru Impreza

Roger Clarke Motorsport now have a new demo car. This model produces 605bhp
Photo courtesy of timeattack.co.uk

Specs:

ENGINE

2L 16ν QUAD CAM EJ20 ENGINE

CLOSED-DECK SUBARU BLOCK

WRC R-PROFILE HIGH WRAP CAM ΒΕLΤ SYSTEM

MODIFIED ΟIΙ PUMP

WRC S10 ΙΝLΕΤ MANIFOLD. ElGHT INJECTOR ΚΙΤ

72 ΜΜ ΤΗRΟΤΤΙΕ ΒΟΟΥ

5.5-LlTER ΑLLΟΥ SUMP

ΟIL CATCH ΤΑΝΚ ΑΝD BREATHER SYSTEM

SUBARU S202 ΟIL COOLER

GOODRICH ΒRAIDED VACUUM HOSES

 

INTERNALS

EXTREME ARROW Η- SECTION RODS

STEEL ΒΙLLΕΤ CRANKSHAFT

OMEGA CERAMIC-COATED FLAT-TOP PISTONS 9.75:1 COMPRESSION

ΡΑRΤΕD STI 4 CYLINDER HEADS MODIFIED FOR LΟΒΕ CLEARANCE. FITTED WITH WRC/RCMS A-RING ΗΕΑD GASKETS ΑΝΟ GAS RINGS

RCMS CAMSHAFTS EXHAUST 270-DEGREE 1Ο.5ΜΜ LIFT. ΙΝLΕΤ 290-DEGREE DURΑΤΙΟΝ ΑΝD 0.5ΜΜ LIFT

ONE-PlECE NIMONIC EXHAUST VALVES

ΟΝΕ PIECE STAINLESS ΙΝLΕΤ VALVES

UPRΑΤΕD VALVE SPRINGS

PLASMA ΝΙΤRΙDΕD ΤΙΤΑΝIUΜ SPRING CAPS

WRC ΜΑΙΝ ΑΝD BIG ΕΝD BEARINGS

 

INDUCTION

GARRET GT40/88 TWIN SCROLL TURΒΟ RUNNING 2.1-BAR BOOST

I.C.E. ADJUSTABLE BOOST (1.2 TO 2.1 ΒΑR)

Κ&Ν AIR FILTER WITH 1Ο0ΜΜ ΙΝLΕΤ TRUMPET

RCMS HIGH-FLOW 100ΜΜ THICK FRONT-MOUNT INTERCOOLER WITH TWIN-TUBE CORE

70ΜΜ STAINLESS STEEL INTERCOOLER PIPEWORK

WIZARDS OF NOS dIRECT-PORT NITROUS KIT SET FOR 100ΒΗΡ lNCREASE

 

FUELLING

8 Χ 700CC INJECTORS

BLUEPRINTED BOSCH 044 FUEL PUMPS (200-LITRE ΡΕR PUMP)

SX FUEL REGULATORS SET ΑΤ 4-BAR STATIC PRESSURE

GOODRIDGE FUEL FEED ΡΙΡΕ

GOODRIDGE FUEL RETURN ΡΙΡΕ

RCMS FUEL DISTRIBUTION BLOCK

FIA SPEC 28-LlTER RUBBER/KEVLAR BAG FUEL ΤΑΝΚ ΙΝ ALUMINUM COVER

VΡ120 RACE FUEL

 

ENGINE MANAGEMENT

Μ800 MOTEC ECU WITH TRACTlON CONTROL. NITROUS CONTROL. ANTI-LAG. ΡΑDDLΕ SHIFT CONTROL ΑΝD FULL DΑΤΑ LOGGING

 

EXHAUST

WRC SHORT RUNNER CERAMIC COATED EXHAUST MANIFOLD

ΤΙΑL 45 ΜΜ ΕΧΤΕΑΝΑL WASTEGATE

3.5-INCH UNSILENCED STAINLESS STEEL SYSTEM WITH CERAMIC COATED DOWNPIPE

 

DRIVETRAIN

R180 STI REAR ΑΧLΕ 3.91 CWP ΑΝD ΡLΑΤΕD ΜΟDΕΝΑ

LSD DIFFERENTIAL

GKN RΑLLΥ DRIVESHAFTS

TOROUE LΙΝΕ CARBON-FIBRE PROPSHAFT

RCMS SIX-SPEED SUBARU GEARBOX CASING MODIFIEO FOR SEQUENTIAL GEARBOX SYSTEM

SIX-SPEED ΜΟDΕΝΑ GEAR ΚΙΤ

SUBARU 3.9:1 FRONT CWP

RCMS ΡΑDDLΕ SHIFT SYSTEM

ΡLΑΤΕD CENTER DIFFERENTIAL WITH 1:1 UΡRΑΤΕD OUTPUT ΜΟDΕΝΑ GEARS

ΡLΑΤΕD FRONT ΜΟDΕΝΑ DIFFERENTIAL

RCMS SPEC ΤRIPLE-ΡLΑΤΕ OS GIKEN CLUTCH ΑΝD FLYWHEEL

RCMS HYDRAULlC LIGHT PRESSURE SYSTEM

 

BRAKES

FRONT ΑΡ RACING 355ΜΜ OISCS ΑΝΟ SIX-POT CALIPERS

RΕΑR ΑΡ RACING GP N 270ΜΜ OISCS ΑΝΟ FOUR-POT CALIPERS

FERODO DS3000 RACING PADS

RCMS HYDRAULlC CARBON ΗΑΝD ΒRΑΚΕ

-3 STAINLESS STEEL GOODRIDGE ΡΙΡΕ WORK ΑΝD QUICK RELEASE FITTINGS

BIAS ΡΕDΑL ΒΟΧ WITH DASH-MOUNTED ADJUSTER

QUICK CHANGE ΒRΑΚΕ BIAS ADJUSTER ΟΝ CENTER CONSOLE

QUICK-RELEASE DRΥ ΒRΑΚΕ FLUID CONNECTlON

 

SUSPENSION

WRC SPEC EXE-TC FULLY ADJUSTABLE DAMPERS WITH HIGH- ΑΝD LOW-SPEED BUMP ΑΝD REBOUND ADJUSTMENT

350-POUND FRONT SPRINGS ΑΝD 325-POUND REARS

STI ROSE-JOINTED RΕΑR LΑΤΕRΑL LlNKS

STI ROSE JOINTED REAR TRAILING LINKS

EXE-TC ΒΟΤΤΟΜ ROSE JOINTED UPRIGHT BUSHES

STI ΑLLΟΥ FRONT ARMS

STI QUICK-STEER STEERING RACK

RCMS ADJUSTABLE ROSE JOINTED ARMS FRONT ΑΝD RΕΑR

RCMS FULLY ADJUSTABLE ΤΟΡ MOUNTS

 

WHEELS AND TYRES

8.5Χ18 DYMAG CARBON MAGNESIUM ALLOYS

245/40-18 MICHELIN ΡΙLΟΤ SPORT CUP ΑΝD ΤΟΥΟ R888 TIRES

 

EXTERIOR

WRC STEEL ARCHES ΑΝD SKIRTS

WRC FRONT ΑΝD REAR BUMPERS

WRC CARBON REAR SPOILER WITH ΑDDΙΤΙΟΝΑL WING SUPPORTS

STI ΑLLΟΥ ΒΟΝΝΕΤ WITH 22Β VENTS

RCMS CARBON VΕΝΤ

WRC FRONT VΕΝΤ ΑΝD RCMS GAS STRUTS

ΗΕΑΤΕD FRONT SCREEN

WRC NON-HEATED LlGHTWEIGHT RΕΑR SCREEN

MODIFIED FRONT ΑΝD RΕΑR ΙΝΝΕR ARCHES

SEMI-TUBBED FRONT ARCHES

SEMI SEAM-WELDED CHASSIS

CARBON-FIBRE RACE MIRRORS

MOTEC DΑΤΑ LOGGING TRANSPONDER MOUNTED ΙΝ DRIVERS WING MIRROR

22Β ΑLLΟΥ WING BADGE ΟΝ FRONT GRILLE

 

INTERIOR

FIA GPN Τ45 ΜULΤΙΡΟΙΝΤ WELDED-IN ROLLCAGE

MOTEC DIGITAL DASHBOARD

DEFI TURBO/FUEL PRESSURE GAUGES

CARBON KEVLAR RECARO SPA PRO SEATS

SABELT SIX-POINT HARNESS

WRC RΟLLΕR BEARING SINGLE-PlECE STEERING COLUMN

ΜΟΜΟ STEERING WHEEL

RCMS SEQUENTIAL GEAR STICK WITH REVERSE LOCK OUT MECHANISM

RCMS STEERING WHEEL MOUNTED ΡΑDDLΕ SHIFTERS

FULL PLUMBED-IN FIRE EXTINGUISHER SYSTEM

RCMS CARBON-FIBRE DOOR CARDS

Related External Links:

Custom Cages

Turbo Magazine

see also:
subaru tuners
subaru impreza gc8 buying guide
subaru impreza history
subaru impreza insurance specialists
track day organisers
best motoring videos 1

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