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Demon Tweeks

£ 27,777

Westfield SeiW Supercharged



For Sale – Westfield SuperTec - 628BHP per Tonne - £27,777.


Due to an unexpected opportunity I offer for sale a well known & very special Westfield (Nessie). Whilst owning the car it has been developed further preparing the car for use on public roads (improved cooling, installation of larger fuel tank and compressor to operate the Quaife sequential paddle change & remapped by NMS 330BHP). It now has passed an MOT (daylight running)


The car was originally built to a very high standard by Paul Aspden, the founder of Playskool Motorsport in circa 1999/2000. It was also owned by WSCC legends, Steve Davies and latterly Mike Allard (The Duck). Mike ran the car successfully in the Speed Series for a time before Richard Kerr purchased her in around 2005/6. It ran a high performance Vauxhall XE with around 235hp and was mated to a Quaife Syncro box.

Initial development produced more power (262 BHP), a Quaife Dog Box. Resulting in winning the Speed Series outright in ’09.

The biggest developments came in 2012 when the journey to 357hp began. Two years spare time lost in the workshop, developing parts, engineering them, trial fitting, many late nights, a whole load of goodwill and a substantial amount of money later, the SuperTec was born! Not for the faint hearted, this car will do 0 – 60 in 2.5 seconds and will get you to 100mph in under 5.7 seconds, it really is that quick!

Spec as follows:


Freshly rebuilt in 2020, mapped & run in by Troy at NMS. Covered less than 500 miles.


2.0 Supercharged Duratec producing 357bhp on NMS Rollers (525kg car) - car detuned to 330BHP by Troy 2021.

Carillo Steel Rods

Supertech Pistons – Brand New for 2020

Newman Cams

Cosworth Steel Crank

Uprated Valves

Uprated Springs

Rotrex C30-94 Supercharger on Custom lightweight mount

750cc Injectors

Custom 4-2-1 Exhaust with 50mm headers

Titan Dry Sump

Titan Oil Pump

SBD Dry Sump Tank

All Newly made Braided oil lines with matt black couplings

Small Lightweight Denso Alternator on custom Bracketry

TTV 1 Piece Custom Crack pulley, keyed to suit crank

All Custom engine Mounts – engine solidly mounted 

Bespoke Motorsport Wiring Loom

Custom PCCB Delete plate

Throttle Bodies

Bespoke Polycarbonate Plenum

Bespoke Aluminium Intercooler

Upgraded Golf Radiator

Lightweight Plumbing with Co-ordinating Blue silicon hoses, (Water and Air)

Davies Craig Electric Water Pump and controller

DTA S100 ECU Controlling Engine and Sequential Gearbox

Traction Control – wet and dry with interchangeable dial switch settings,

Launch control

20 Litre Foam filled Fuel Tank with internal primary pump

Fuel swirl Pot

High and Low Pressure Fuel Pumps

7” Superclutch

SBD Lightened Flywheel

Always run on Millers Nano Grade Motorsport Oil

Brand New Magnecor leads and plugs

It's also worth noting that the car is only running 0.7 bar of boost, there is a lot more power to unleash with fairly minimal effort or expense .


Drive Train

Quaife 60G Sequential Gearbox on paddles, flat shift controlled via ECU, clutch off the line only!

Pneumatically controlled with onboard bottle

Box Fully rebuilt 2017 – covered less than 100 miles since

Rear Flange Modification Completed

Carbon bespoke paddles mounted on Racetec Steering Wheel

Lightened and balanced Bailey Morris Propshaft

Quaife ATB Differential built into refreshed Sierra Casing

Titan Bellhousing


Steering and Suspension

Titan lightweight bespoke steering Rack (new 2016)

Siltec Lightweight Alloy Uprights

Siltec Widetrack Wishbones

Protech Double Adjustable shocks Front and Rear

Eibach Springs 400lbs front 250lbs rear

Polybushed Rear Wishbones

Playskool Front Anti Roll Bar

Playskool Rear Anti Roll Bar

Worx Bell Racing Qiuck Release Steering Wheel Boss

Wireless Removal of Wheel


Bodywork and Chassis

Car 525KG

Lightweight Westfield ZK Bodywork

Mickmade Carbon Side Panels

Mickmade Carbon Nose

All Carbon Interior Panels

Carbon Tillet Seat

Playskool 3” Harnesses, FIA Approved and in date

Part Honeycomb Composite removable Floor

Westfield Lightweight Chassis

Caged Homoligated Cage

V8 Bonnet

Carbon Aeroscreen

Carbon Cycle Wings

Carbon Boot Cover

Carbon dash

AIM MXS Strada Programmable Dash, with GPS and Logging (New 2018)



1 Set Force wheels mounted with new Toyo  888 tyres 10” front 12” rear


Car is MSA log Booked.

Car MOTd (daylight running)



This is a serious car with a huge amount of development completed (time and money). Price £27,777 - Caterham 620R performance at a fraction of the price.

Please call or email for further information - 07952 513623

Cheers Simon

(Photos to follow).

Keyword Search Terms:

Westfield Caterham 620R MOT


Seller: Rossins
Joined August 2017
  Simon Rossinelli
Seller's other ads
Country: United Kingdom
City: County Durham
Phone: 0044 752 513623
Currency: GBP
Condition Used
Trade or Private: Private
Price: £27,777
Added: 01/07/2022
Views: 1930

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