MGBGT V8 Specifications


Production Period

1972/76

Chassis

Unit Construction body, welded steel constuction, front suspension on subframe.

Wheelbase: 7ft 7in
Track Front: 4ft 1.00in
Rear: 4 ft 1.25in

Steering

Cam Gears rack & pinion system.
Turning circle: 32ft
Castor angle: 7 degrees
Camber angle: 1 degree
Kingpin angle: 8 degrees
Toe in: 0.1875in
Grade of oil: SAE 90

Brakes

Disc front, drum rear.
Disk size front: 10.75in
Drum size rear: 10in
Method of operation: Hydraulic, vacuum servo assisted as standard. Cable operated parking brake.

Wheels

Steel rims, alloy centre composite construction, bolt-on type.

Rim size: 5J * 14
Tyre Size: 175HR * 14
Tyre pressure: 21psi front, 25 psi rear

Engine

8 cylinder in V, pushrod ohv.

Bore: 88.9mm
Stroke: 71.12mm
Cubic capacity: 3532cc
Power output: 137bhp @ 5000rpm
Oil pressure: Approx. 30-40 psi at all speeds Grade of oil: SAE 20/50
Sump Capacity: 8 pints including filter

Ignition Timing

8 deg BTDC @ 1000rpm
Distributor points gap: 0.015in
Sparking plugs: L92YC
Gap: 0.035in
Firing order: 1 8 4 3 6 5 7 2

Carburetter Type

Twin SU HIF6

Jet size, main: 0.100
Needle recommendation: BBU

Clutch

Borg & Beck Single dry plate
Material: Ferodo
Number of springs: Single Diaphragm

Gearbox

Four speed manual, synchromesh on all gears. Overdrive on top gear.

Ratios:

Overdrive: 0.820
Top: 1.000
Third: 1.259
Second: 1.974
First: 3.138
Reverse: 2.819

Grade of oil: SAE 90
Capacity: 6 pints

Propellor Shaft

Open shaft, needle roller u/j at each end.

Final Drive

Live axle, hypoid bevel gears.
Ratio: 3.071
MPH/1000rpm: Top: 23, o/d: 28
Grade of oil: SAE 90EP
Capacity: 1.5 pints

Cooling System

Pressurised, thermostatic control, pump assisted. Capacity: 16 pints.

Fuel Tank Capacity

Approx. 12 gallons. Tank located at rear of car under boot floor.

Body Styles

2 seat Coupe only

Numbers built:

1972 3
1973 1069
1974 854
1975 489
1976 176

Further V8 Information

A guide to V8 Conversions for the MGB

The RPI Engineering Web Site


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