The XR4Register Profile - Simon 'Gengis' Stephens
Ford Sierra XR4x4 2.9 Twin Turbo
Engine & Transmission
The heads are gas flowed and ported and are fitted with larger inlet and exhaust valves. The exhaust valves are sodium filled to aid cooling. The turbos are hybrid Garrett T25's with 360 thrust bearings set at 1.3 bar of boost. The bottom end has been fully lightened and balanced and the block is fitted with low compression pistons with ceramic coatings, which dramatically reduces piston crown temperature. The distributor has been modified to allow the ignition to be advanced more and the ECU has been extensively modified to increase fueling. Also the air flow meters have been removed and replaced with an air sensor, which allows the ECU to control the fueling much better. The idle control sensor has been removed as the idle and mixture are now controlled by the ECU and the engine is now running Cosworth injectors & dump valve. The breather system has also been changed to cope with the extra power. The visous fan has been removed and two electric fans are now used connected to a variable temperature switch. The gearbox has been rebuilt and uses an AP racing clutch & AP paddle clutch plate with standard cover. Also a quick shift and a full throttle gear change kit has been fitted. Recently fitted Tube Torque stainless steel exhaust. Replaced water pump with an electric one and also fitted an aluminium radiator and aluminium intercooler.
Suspension & Brakes
The suspension has been fitted with AVO adjustable dampers and system 2 lowering springs. All bushes have been replaced by polyurethane ones and the front track control arms are adjustable. An OMP front strut brace. The brakes are fitted with ABS and run Ferodo DS2500 front brake pads EBC green stuff rear pads and also at the rear EBC grooved and spotted discs are fitted. The wheels are off a series 1 RS turbo and are fitted with Yokohama 205/50 15 tyres.
Body & Interior
The body and interior are almost standard apart from the removal of the centre air vents and three gauges (oil pressure, oil temperature, turbo boost) fitted in their place. Also the bonnet has vents pressed into it to aid cooling and the underside of the car and the suspension has all been striped/ painted and powder coated. Samco silocone intercooler hoses have been fitted and also the front fog lights have been removed and replaced by 2 air scoops which feed the air filters. The rear wash wiper has also been removed.
Performance achieved at Shows
1/4mile time of 12.295 secs performed at Classic Ford Show, Santa Pod 2005 Mpeg of 1/4 mile run
0-60 in 3.98 secs as performed at TRAX 2004, Mpeg of 0-60 run
0-60 in 4.19 secs as performed at Ford Fair 2004
0-60 in 4.77 secs as performed at TRAX 2003
1/4mile time of 13.73 secs performed at RS Central Day, Santa Pod 2003
0-60 in 5.5 sec as performed at TRAX 2002
Top speed 137mph as proved in Performance Ford Feature in Feb 2006 magazine
Awards Won
2005 Town & Country - 3rd place for 'Modified Concourse Class'
2005 Ford Fair - 1st place for 'Sierra Modified Concourse Class'
2004 Interford - 1st place for 'Modified category'
2003 Interford - 1st place for 'Modified category'
2003 Town & Country - 1st place for 'Best car in sporting class'
2000 XROC National Day - 2nd place for 'Modified XR4x4'
1999 Combe Abbey - 2nd place for 'Best Visiting Car'
1999 Drayton Manor - 3rd place for 'Best Visiting Car'
Power Plot
Latest plot (click image for full size)
Magazine Feature
Sierra Showdown Grudge Match Feature in Performance Ford Feb 06 Edition
Last updated 08.01.06
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Car Profile
Owner: Simon Stephens
Model: XR4x4
Engine: 2.9 Twin Turbo
Gearbox: MT 75
Suspension: AVO and system 2 springs and poly bushes
Exhaust: Stainless Tube Torque
I.C.E: Standard
Interior: Standard
Exterior: Standard with 15" wheels
Performance: 137mph & 330bhp. see times opposite
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