Service Data
for MG VA as written in The Complete Workshop and Tuning Manual by W.E. Blower 6th edition 1957
Wheelbase 9'0''
Dia. & length of big ends 48mm. Dia, 30mm long
track 4'2''
Sump capacity 5 1/2 quarts
Turning circle 38'0''
Grade of engine oil Summer Duckhams NP 5 Winter Duckhams NP 3
Steering lock 2 1/2 turns
Piston ring gap .004'' - .006''
Steering knuckle angle 10 degrees
Main bearings 3. 55mm diam.41mm long
Castor angle 4 1/2 degr (incl 1 1/2 degr taper packing
Valve throat diameter Inlet 32mm Exh 28 mm
Toe in 1/4 ''
Valve spring pressure Shut 101 lbs open 130 lbs
Brake drum front 10'' diameter
Valve liftInlet & exhaust 8,4 mm
Brake lining front Ferodo M.R.
Starter motorRatio 9,46 to 1
Brake operation Lockheed hydraulic
Dynamo Ratio 1,34 x engine speed
Standard gear ratio 5.22 (9/47)
Oil pump 1/2 engine speed
Rear axle oil capacity 2 pints
Bye-pass pressure 60 lbs/sq.inch
Diff gear 4 star
Fan diameter & speed 12'' dia. 1,1 x engine speed
Brake drum rear 10'' diameter
Total weight of power unit 4 cwts. 1qr 8lbs
Brake linings rear Ferodo MRDistributor points.010'' - .012''
Handbrake Cable, rear Gudgeon pin18mm diam
Propellor shaftHardy spicer 3'' diam Length 52 15/16''
Valve seat angle 45 degr
Rear axle oil Duckham's "XS"press oil
Main bearings 55 dia x 41mm long
Steering Bishop cam 14:1 ratio
Con rod big ends 48mm x 30mm long
Steering wheel 17'' diam Bluemell telescopic
Rear hub bearings Ransome & Marles LJ.40
Silencer(two) Burgess type
Max torque 892 lbs at 2600 r.p.m.
Petrol tank 12 gallons (no reserve)
Bhp per litre 35,6
Wheels Dunlop 3.00'' W.B. x 19''
Clutch Single plate running in oil Later: single plate 8'' diam
Tyres Dunlop 5.00'' x 19'' Standard "90"
Clutch springs oil type Pressure (pedal free) 682,5 lbs. 15 per set
Battery One 12V Lucas
Dry type Pressure (pedal free) 840 - 876 lbs 6 per set
Amp.hr.cap. 10hr rate60
Gearbox Manual, 4 speeds & rev. Synchro on 2nd,3rd and top
Speedometer Jaeger 5'' diam translucent
Gearbox ratios Top 1:1 3rd 1,35 : 1 2nd 1,95 : 1 1st 3,38 : 1 rev 3,38 : 1
Speedo reduction box. 5/11 ratio
Gearbox oil capacity 1 3/4 pints
Petrol gauge Jaeger Electric
Grade of oil gearbox Duckham's Synchro Oil "S"
Facia board Walnut
Overall length of car Saloon 14'1'' Tourer 14'3''' Coupe 14'6''
Position of toolbox Tourer - under bonnet Saloon - in rubber tray in boot lid
Overall height Saloon 5'1 3/4'' Tourer 5'0'' Coupe 4'11''
Engine type 4 cyl. O.H.V. Push Rod operated
Overall width Saloon 5'2'' Tourer 5'2'' Coupe 5'2''
R.A.C. rating 12 HP
Chassis weight 18 1/2 cwts
Bore, stroke & cap 69,5mm x 102mm 1549 cc
Weight complete car Saloon 24 1/4 cwts Tourer 22 cwts Coupe 25 cwts
Compression ratio 6,5 : 1
Ground clearance 7''
Brake horse power 55 at 4.400 r.p.m.
Water capacity 2 gallons 3 pints
M.P.H. per 1000 rpm16,29 in top gear
Petrol consumption 25 m.p.g. approx.
Ignition 12v coil & distributor
Cooling system Pump & fan
Ignition timing T.D.C. to 28 degr advance on crank
Capacity of Lockheed system 1 1/4 pint
Sparking plug Champion L 10 14mm x 1/2'' reach or Champion L 86 C
Capacity of Jackall system2 1/4 pint
Tappet clearance Early cars .015'' hot Later cars .019'' hot
TPDG engineBore 73mm, stroke 102mm, cubic capacity 1707cc.
Carburettor needle No 69
Sparking plugs Champion LA11 with gaps at standard.
Valve timing inlet Opens 11 degr B.T.D.C. Closes 59 degr A.B.D.C.
Tyre pressureSaloon 30 lbs front & rear Tourer 28 lbs front & rear
Exhaust Opens 56 degr B.B.D.C. Closes 24 degr A.T.D.C.
Later cars inlet Opens 11 degr B.T.D.C. Closes 57 degr A.B.D.C.
Exhaust Opens 52 degr B.B.D.C. Closes 24 degr A.T.D.C.
Valve timing measured round flywheel
Inlet opens 30,7mm B.T.D.C closes 164,7mmA.B.D.C.
Exhaust Opens 156,4mm B.B.D.C. Closes 67mmA.T.D.C.
Piston clearance.002'' - .003''
Carburettor Twin 1 3/8'' S.U. semi DD
Carb needle Standard CO Richer BK Weaker CP
Connecting rod 204mm.centres.white metal lined
BdV
Thanks to Tony Slattery