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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

 

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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)

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(*) From FC 17,136

(**) Between FC 3.214 and FC 39.527

 
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