The GTM Coupé
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 |
|
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 |
|
ECU | Honda JDM PW0 with DNR Performance Engineering replacement chip |
|
Gearbox |
Honda L3 |
|
Suspension Type |
Minitastic coil springs, with height adjustable trumpets |
|
Braking System |
Front - Girling AR Calipers on 238.8mm solid disks taken from the rear of a Honda CRX. |
|
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.
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.