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 lift Inlet & exhaust 8,4 mm
Brake lining front Ferodo M.R. Starter motor Ratio 9,46 to 1
Brake operation Lockheed hydraulic dynamo Ratio 1,34 x engine speed
Standerd 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 MR Distributor points .010'' - .012''
handbrake Cable, rear Gudgeon pin 18mm diam
propellorshaft Hardy 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 rate 60 gearbox Manuel, 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 reduc.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 clearence 7''
Brake horse power 55 at 4.400 r.p.m. Water capacity 2 gallons 3 pints
M.P.H. per 1000rpm 16,29 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 system 2 1/4 pint
Tappet clearence Early cars .015'' hot

Later cars .019'' hot

 TPDG engine Bore 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 pressure Saloon 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 30,7mmB.T.D.C

closes 164,7mmA.B.D.C.

Exhaust

Opens 156,4mmB.B.D.C.

Closes 67mmA.T.D.C.

    
Piston clearence .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    

 

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