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Stephen W

Westfield SEW Aerorace Chassis - 2.0 Duratec 306bhp @ 8700rpm

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Just testing the water with this really. I have track days booked (including Spa soon!), but since its now finished and working I'd like another challenge!

Westfield SEW – Aero Race Chassis – 2.0 Duratec – 306bhp - 198lb/ft


Ford 2.0 Duratec

Built in 2016 by Premier Race Engines, Brackley and Northampton Motorsport http://www.premierpowerengines.com/ http://www.northamptonmotorsport.com/

  • New block from Ford
  • Forged Arrow Steel Crank
  • Forged Arrow Connecting Rods
  • SBD Slipper forged pistons
  • Ultimate performance head (www.ultimatep.com) with over sized valves - Flows enough for 330bhp if ever fitted to a 2.5.
  • SBD 300bhp specification cam shafts
  • 440cc Injectors
  • Up-rated valve train - Solid lifters, shims, guides and valves. 9500rpm capable head.
  • Jenvey 50mm throttle bodies


Dry sumped using Titan alloy sump, pump (2 x scavenge, 1 x pressure)
Pace alloy tower tank

Air to Oil oil cooler

55mm Coolex Alloy Radiator

Omex 600 ECU

All rotating and reciprocating parts were balanced by Premier Race Engines

The engine was re mapped by Northampton Motorsport in May 2017 and produced 306bhp @ 8700rpm and 198lb/ft @ 5200rpm.

The engine has done 8 hillclimbs, 1 track day, and a few road miles since build. (18 hours running time)


Original engine build cost was £26k.


Engine was purchased by myself in March 2018 from the person who commissioned it and was fitted to this chassis in June 2018 by myself.



Custom CSK Race exhausts 4-2-1.

Built to exact SBD specs for £1400 in June 2018.


Drive train

Quaife all alloy 5 speed Heavy duty Type 9

Titan alloy bell housing

Straight cut, close ratio 2.04, 1.54, 1.21, 1.0, 0.87

SBD super lightweight flywheel and twin plate ‘Super Clutch’ clutch
New Hydraulic clutch release system

Gearbox positioned to avoid need for selector extension

Rebuilt by Brian Hill at BGH Geartech and has done 7 events since then


Final Drive

English Axle with rare 4.4:1 CWP on a Quaife ATB limited slip differential – assembled by Brian Hill



Standard Westfield Aerorace with AVO dampers all round

All joints are poly-bushed, and dampers are rose jointed

Alloy uprights at front

Front adjustable anti roll bar

Front dampers rebuilt by AVO in spring 2015

Brand new Mini-lites with one track day old Yokohoma AO48R’s



Factory fit floor mounted adjustable bias brakes

Solid disks at front grabbed by Race Leda four pot alloy callipers with Hawk ferro-carbon pads

Standard drums at rear

Braided hoses all round



Westfield race chassis (i.e. additional bracing, but thinner tube, compared to ‘road’ chassis)

Chassis manufactured in 1999 (so no need for a catalytic converter under MSA rules)

All alloy panels were etch primed prior to painting, and are bonded using PRC (aircraft panel sealant) as well as riveted

Alloy front uprights



New lightweight ZK bodywork with V8 bonnet for engine clearance in August 2018.

Playskool carbon aeroscreen, dash, rear deck and glass fibre ‘diffuser’

Carbon NV arches



Dash2 Pro with GPS speed reading, internal logging and all UK tracks pre loaded.

Playskool glassfibre seats

Carbon NV Dash



Lifeline plumbed-in extinguisher

Driver’s 6 point FIA harness (In date)

Passenger’s 4 point Willans harness (Not in date)

1kg LiPo battery with cut off switch

Caged – full FIA race spec cage




The car was SVA’d when build was completed in 2001, and registered on a 1975 age related plate as a consequence of having demonstrable provenance to a donor Ford Escort.

The car remains road registered and can be tax’d and MOT’d.

Tax is free due to historic status.

The car was converted to a 200bhp Rover K series in 2004 before competing.

The car was then converted to a 306bhp Duratec in 2018.

It has done somewhere around 4,000 miles in total.

The car has been sprinted and hill climbed and is believed fully legal for RAC MSA approved circuit racing and speed events in UK.


The car is currently sorn with no MOT but can easily be MOT'd if the buy wants as all the lights etc are present and working. 


Offers around £20k









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