The GTM Coupé

GTM Logo

Technical Specifications

Bodywork

Body Type

2 Seat mid-engined coupé

Chassis Type

Fabricated steel semi-monocoque chassis with unstressed glassfibre body

Length

130"

3.3m

Track

50"

1.27m

Wheelbase

84"

2.13m

Height

42"

1.06m

Ground Clearance

5"

12.7cm

Weight In Road Trim

12 cwt

609.6Kg

Interior Height

37"

94cm

Interior Width

49"

1.24m

Interior Length

55"

1.39m


Original Engine

Engine

A+ Series 1275cc (modified up to 1380cc)

MED engine, bored to 73.5mm with Omega pistons, 276 Kent cam, lightened flywheel, Stage 3 head with 36mm Inlet & 31mm Exhaust Valves. Weber DCOE 45 carburettor
Click here for build spec

Gearbox

Standard Mini/Metro 4-speed

Suspension Type

Mini rubber cone, with height adjustable trumpets

Braking System

Front 8.4" diameter brake disks, with single pot AP calipers - "minifin" drums on rear


Current Engine

Engine

Honda D16A9, 1590cc
75mm Bore, 90mm Stroke,
16V, DOHC.
Maniflow stainless repackable exhaust
CompetitionClutch 2-702-st Flywheel

ECU

Honda JDM PW0 with DNR Performance Engineering replacement chip

Gearbox

Honda L3
CompetitionClutch 8022-2100 Clutch

Suspension Type

Minitastic coil springs, with height adjustable trumpets
KAD Front Anti-roll bar

Braking System

Front - Girling AR Calipers on 238.8mm solid disks taken from the rear of a Honda CRX.

Rear - VW Golf MK2 rear Calipers with 8.4" solid disks off the original Mini

KAD Split master cylinders with Bias bar

Chassis

The chassis is fabricated from 18-20 swg (1.2mm) steel, to incorporate the floor pan, boxed sills and the central tunnel box section. It forms a very robust structure. The fabrication is carried forwards in order to locate the front sub-frame, and a 1" (25mm) square tubular space frame extends beyond the rear bulkhead to carry the rear sub-frame. Welding was carried out by MIG for consistent quality and to avoid distortion. The chassis was fully jigged during manufacturing to ensure a true and accurate assembly.

Body

The body is moulded in high quality glass reinforced plastic. It is extremely tough, non rusting and , being unstressed, is not subject to gel-coat star crazing as found on many cars using GRP body shells. The windscreen is laminated glass and the rear screen perspex.

Doors

The doors are double skinned glass fibre fitted with anti-burst locks, steel window frames, and steel strengthers to avoid door drop, often found on glass fibre cars. The sliding windows are toughened glass, coming from the Mini traveler.

Bonnet

The bonnet is again molded in high quality glass reinforced plastic. It is hinged at the front to give access to under bonnet space.

Boot

Completely separate boot compartment situated behind the engine, offers 4 cu. Ft. ( 0.113m3) of luggage space with separate locking boot cover.

The car was available in several groups of "part packs" that were designed to allow each stage of the build to be purchased separately as they were undertaken, spreading the costs over a period

"Labour packs" were also available for customers that wished GTM to undertake specific stages in the construction.