SPITFIRE 4
La Triumph Spitfire 4 è una spider due posti con carrozzeria monoscocca e telaio separati ed imbullonati. Le sospensioni anteriori sono a trapezi oscillanti con molle e ammortizzatori coassiali. Retrotreno, a ruote indipendenti, con balestra trasversale, bracci longitudinali e semiassi oscillanti. Il propulsore è un 1.147 cc in linea ad aste e bilancieri con 63 CV. Cambio a 4 marce (prima non sincronizzata) + retromarcia, ed overdrive su III e IV marcia (optional). Fu disegnata dall’italiano Giovanni Michelotti nel 1960 e venne presentata al mercato nel 1962 al London Earls Court Motor Show nell’autunno del 1962. Prodotta da Ottobre 1962 a Dicembre 1964 in 45.753 esemplari.
| -PRODUZIONE (PRODUCTION) | -IMPIANTO ELETTRICO (ELECTRICAL) | -SOSPENSIONE POSTERIORE (REAR SUSPENSION) |
| -PRESTAZIONI (PERFORMANCE) | -TRASMISSIONE (TRANSMISSION) | -CERCHI E PNEUMATICI (WHEELS AND TYRES) |
| -MOTORE (ENGINE) | -FRENI (BRAKES) | -CAPACITA’ LIQUIDI (CAPACITIES) |
| -ALIMENTAZIONE (CARBURATION) | -STERZO (STEERING) | -DIMENSIONI E PESI (DIMENSIONS AND WEIGHTS) |
| -ACCENSIONE (IGNITION) | -SOSPENSIONE ANT. (FRONT SUSPENSION) |
- PRESTAZIONI (PERFORMANCE)
- MOTORE (ENGINE)
- ALIMENTAZIONE (CARBURATION)
- IMPIANTO ELETTRRICO (ELECTRICAL)
- TRASMISSIONE (TRANSMISSION)
- FRENI (BRAKES)
- STERZO (STEERING)
- SOSPENSIONE ANT. (FRONT SUSPENSION)
- CERCHI E PNEUMATICI (WHEELS AND TYRES)
- CAPACITA’ LIQUIDI (CAPACITIES)
- DIMENSIONI E PESI (DIMENSIONS AND WEIGHTS)
PRODUZIONE (PRODUCTION)
| Dates | Oct 1962-Dec 1964 |
| Commission | Numbers FC 1-FC 44.573 |
| Production break points | N/A |
| Engine numbers | FC |
| Gearbox numbers | FC |
| Differential numbers | FC |
| Total produced | 45.753 |
| Basic price | £530 |
PRESTAZIONI (PERFORMANCE)
0-60mph (0-97kmIh) 15.5 secs
Top speed 92mph (148km/h)
Standing ¼ mile 19.5 secs
Bhp/ton-(dry weight) 81.6 bhp/ton
Overall fuel consumption 31.2mpg (9.161/100km)
Touring fuel consumption 35mpg (8.11/100km)
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MOTORE (ENGINE)
Brake horse power (net) 63bhp @ 5.720rpm
Torque (net) 671b.ft @ 3.500rpm
Bore 69.3mm
Stroke 76.0mm
Cubic capacity 1.147cc
Compression ratio 9.0:1
Oil pressure 40 Ib/in2 at 2,000rpm
Crank big end diam. 1.625in
Crank main bearing diam. 2.0005in
Camshaft journal diam. 1.8405in
Camshaft timing 18°-58°-18°-58°
Valve head diam. Inlet -1.245in
Exhaust -1.150in
Valve lift 0.312in
Tappet clearance 0.010in
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ALIMENTAZIONE (CARBURATION)
Carburettors Twin SU
Size 1 ¼ in HS2
Needle AN
Jet size 0.090in
Fuel pump AC Delco
Idle speed 700-750rpm
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ACCENSIONE (IGNITION)
Firing order 1-3-4-2
Spark plugs Lodge CLNY
Spark plug gap 0.025in
Distributor Delco Remy D200,7952800
Contact breaker gap 0.020in
Dwell angle 36°
Ignition timing – static 13° BTDC
Centrifugal advance 0° at 800pm
11°/13° at 4.400rpm
Vacuum advance 0° at 2in Hg
9/11° at 9/11in Hg
lgnition coil Lucas HA 125195
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IMPIANTO ELETTRICO (ELECTRICAL)
Earth Positive
Battery Lucas BT.7A 43Ah
Dynamo Lucas C40-1
Charging voltage 12.6-13.4 volts
Max current output 22 amps
Starter motor Lucas M35G
Headlights 50/40w
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TRASMISSIONE (TRANSMISSION)
Clutch Belleville spring washer
Clutch diam. 6 ¼in (6 ½in) *
Clutch output shaft 10 splined
Master cylinder diam. ⅝in
Slave cylinder diam. ¾in
Gearbox 3-rail
Synchromesh 4th, 3rd, 2nd only
Gear ratios 4th-1.0, 3rd-1.39, 2nd-2.16,
1st-3.75, R-3.75
Optional overdrive Laycock D-type
Overdrive ratio 0.802
OD Gear ratios OD/4th, 0.80;
OD/3rd, 1.11
Final drive ratio 4.11:1
Overall gear ratios 4th, 4.1 1; 3rd. 5.73;
2nd. 8.87; 1st, 15.4
Overall ratios with O/D OD/4th, 3.3; OD/3rd, 4.6
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FRENI (BRAKES)
Front 9in disc
Calliper type Girling 12.p
Swept area 144in2
Rear 7 X 1 ¼in drum
Swept area 55in2
Wheel cylinder diam. ¾in
Master cylinder diam. ⅝in
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STERZO (STEERING)
Type Rack and pinion
Ratio 3.75
Turning circle 24ft 2in
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SOSPENSIONE ANT. (FRONT SUSPENSION)
Type Double wishbone
Spring length – free 12.59in (12.21in)**
Spring length – fitted 7.8in (7.42in)**
Spring rate 150lbf/in
Spring identification Green (Light Blue)**
Anti-roll bar diam. 11/16in
Camber angle unladen +2° ± ½°
Castor angle unladen 3° ± ½°
King pin inclination 6¾° ± 1°
Toe ⅟16in – ⅛in toe in
Track 4ft 1in
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SOSPENSIONE POSTERIORE (REAR SUSPENSION)
Type Swing axle
Number of leaves 7
Leaf width 1.75in
Leaf thickness 0.2188in
Spring rate 166lbf/in
Spring camber fitted -1.881n
Toe unladen ⅟16in – ⅛in toe out
Camber angle unladen ½°
Track 4ft 0in
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CERCHI E PNEUMATICI (WHEELS AND TYRES)
Wheel size Steel 13 X 13½ D
Optional wire wheels 13 x 14½ J
Tyres Dunlop C41
Tyre size 5.20Sx 13
Tyre pressure Front -18lb/ln2
Rear-24lb/in2
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CAPACITA’ LIQUIDI (CAPACITIES)
Engine oil 7 pints (4.1 litres)
Gearbox oil 1½ pints (0.9 litres)
Overdrive gearbox oil 2⅜ pints (1.4 litres)
Differential 1 pint (0.6 Iitres)
Cooling system 9½ pints (5.6 litres)
Fuel tank 8¼ gallons (37.5 litres)
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DIMENSIONI E PESI (DIMENSIONS AND WEIGHTS)Length overall 145in (3.683mm)
Width overall 57in (1.448mm)
Height overall unladen 47½in (1.206mm)
Ground clearance laden 5in (120mm)
Wheel base 83in (2.108mm)
Dry weight 1.543lb (700 kg)
(*) From FC 17,136
(**) Between FC 3.214 and FC 39.527
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