Modified Subaru Impreza WRX STI GC8 1999 Pictures 
PRO OF THE CLASS
Paul Doyle fought hard in this season’s Time Attack Pro Class and gained a respectable third place despite being a top category rooky.
gallery (15 photos)
Having achieved two class wins and second place in the Club Pro Time Attack championship last year, Paul was ready to take his driving and his Subaru Impreza to the next level. KSport brakes have since come on board as a sponsor so as well as getting some sturdy callipers and discs he has also benefitted from their technical experience. The Impreza’s brakes are also fitted with EBC`s Bluestuff NDX pads. Remarkably both are available for street use so if you have taken a shine to them, you too can blast around town with these items.
Not many of us have Zen Performance or Scoobytech representatives lurking around in our garage though, nor Enginetuner`s Alan Jeffery to take care of any major mechanical issues we may have with our motors. These are such perks that come with being a Time Attack driver. Paul does his fair share of grafting however and when he is not at his day job at the power station you will find him tinkering beneath the bonnet of his beloved Scooby.
In addition to the Impreza’s increased engine displacement and menacing Garrett ball-bearing turbocharger, there’s Lateral Performance’s custom forged pistons, H-beam rods and AVCS cams. Supertech valves with ported heads and WRC-inspired 14mm head studs are also present.
New this season is a larger exhaust housing (1.06 A/R from 0.85) which means that peak power has increased. The longer spool times incurred by this modification are of little significance to Paul who is usually running his car at high revs and on boost with nitrous injection enabled.
This year Paul and the team have also opted for a custom ram air intake system for optimum boost pressure. There is now such an abundance of cold air that overboosting was feared. Another fear that had to be settled before the championship was fought was temperature management. Last year this caused a few upsets but it has since been rectified with twin 25-row oil coolers mounted behind the front bumper. There is also now an added member to the injector fuel-spray system which controls the intake temperature. The supply of fuel is also taken to the extreme with 2200cc of fuel per minute flowing from four ID-2000 top feed injectors which in car measures is serious binge drinking!
There are plenty more technical factors that come into play when deciding how best to distribute torque. There’s a Quaife-style limited slip device at the front, a more thoroughbred Kaaz alternative at the rear and a Driver Controlled Centre Differential (DCCD). This string of letters incorporates both a Neetronics standalone controller capable of 12 preset profiles (10 are user-defined) and a Impreza`s Syvecs electronic choice. The latter tirelessly monitors a stream of data to determine speed, throttle position and braking power so the ECU can constantly adjust the behaviour of the chassis.
The chassis incidentally has hand-picked anti-roll bars and custom-valved dampers for the purpose of winning races (what a result at Anglesey - a 1:14.873 lap time as well as pipping Gavin Renshaw to the post). Modified suspension mounts, precise re-positioning of the mounting points and adjusting the arches have all resulted in exceptional balance and accuracy.
With its WRC-spec bodyshell and stiffened composure achieved by the FIA-spec roll cage as well as carbon-Kevlar body panels to widen its appearance, this Subaru Impreza is one fine show of machinery. It also handles its new Pirelli P-Zero (road worthy) control tyres with grace although Paul was quite attached to the semi-slick track versions from last year.
Aerodynamics of course have been another crucial task and everything from the rear diffuser to the louvres and vents in the front wings together with the boxed areas behind the rear wheels ensure that the air is escaping properly and not affecting the down force.
Overall then, it’s been a pretty successful year for both Paul Doyle and KSport which have proved over the six month season that their brakes are up to the demands of this brutal class of Motorsport.
Attention now turns to the 2012 season, KSport have confirmed thier continued support into 2012 for Paul and the team, and with even more pro teams set to enter the increasingly popular Time Attack series the KSport team look forward to pushing for more podiums and wins throughout next year...
CAR MAKE & MODEL
Modified Subaru Impreza WRX STI GC8 1999 Pictures
CAR REF NUMBER
39652
ENGINE MODIFICATIONS
enginetuner supplied 2.35-litre subaru boxer engine, ej22t closed deck block with 14mm wrc-style head stud conversion and enginertuner rear thrust bearing configuration, oe subaru ej257 crankshaft, custom lateral performance forged pistons and h-beam connecting rods, acl race bearing shells, ported big valve cylinder heads with lateral performance avcs cams and supertech valves, cosworth stopper gaskets, cosworth kevlar timing belt, custom ram air intake system, front-mounted intercooler, aet turbos supplied garret gt4094r twinscroll turbocharger on custom manifold, custom 3.5” stainless steel exhaust, boot-mounted atl fuel cell, twin bosch motorsport-spec 10 bar fuel pumps, custom swirl pot, billet fuel rails, injector dynamics id 2000 injectors, 740cc injector on intake, rear-mounted coolant radiator, zen performance dry sump system, twin 25-row oil coolers, syvecs standalone engine management. 2x 2.5lb 150 shot dry nitrous gas injection.
TRANSMISSION MODIFICATIONS
kaps r4 sequential box sequential transmission with flat upshift and downshift auto blip, helix 184mm triple plate sintered clutch, custom flywheel, quaife-style front limited slip differential, dccd centre diff, kaaz rear limited slip differential, neetronics electronic centre diff controller, my06 sti hubs and driveshafts
SUSPENSION MODIFICATIONS
custom-valved ast three-way dampers, custom zen performance-modified subframes and suspension mounting points, custom zen performance solid diff mounting frame, custom zen performance rear suspension arms, whiteline front anti-roll bar, custom rear anti-roll bar, ksport air jacks
ALLOY WHEELS
9x18” et30 team dyamics prorace 1.2 rims
TYRES
265/35 pirelli p-zero
BRAKES
2011-spec ksport 355mm eight-pot front brakes, ksport 330mm four-pot rear brakes, ebd bluestuff ndx race pads all round, ksport hydraulic handbrake
EXTERIOR MODIFICATIONS
matt black vinyl-wrapped wrc-spec impreza shell, wrc-style wide arch carbon-kevlar body panels, custom zen performance rear diffuser, flat floor and front splitter, modified twinblade aluminium rear wing, ploycarbonate windows and rear screen, ksport livery
INTERIOR MODIFICATIONS
seam welded and lightened shell, custom cages t45 fia-spec weld-in roll cage, tilton pedal box, cobra suzuka composite seat, ksport harnesses, lifeline pro zero 360 fire suppression system, aim digital dash with full-time datalogging, aim smartycam in-car video system, momo steering wheel with quick release hub, flocked dash, custom wiring loom and switch panel
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