The Firebird Formula 455 HO is a rear wheel drive coupé automobile with a front positioned engine, from Pontiac.
Its 7.5 litre engine is a naturally aspirated, overhead valve, 8 cylinder unit that has an output of 335 bhp (340 PS/250 kW) of power at 4800 rpm, and maximum torque of 651 N·m (480 lb·ft/66.4 kgm) at 3600 rpm.
This power is supplied to the wheels via a 4 speed manual gearbox.
Full specs
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| bodywork | |||
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| Body type | 2+2 seater fixed-head coupé | ||
| Number of doors | 2 | ||
| Designer | |||
| dimensions & weights | |||
| Wheelbase | 2743 mm | 108 inches | |
| Track/tread (front) | 1565 mm | 61.6 inches | |
| Track/tread (rear) | 1532 mm | 60.3 inches | |
| Length | 4867 mm | 191.6 inches | |
| Width | 1864 mm | 73.4 inches | |
| Height | 1280 mm | 50.4 inches | |
| Ground clearance | 117 mm | 4.6 inches | |
| length:wheelbase ratio | 1.77 | ||
| Kerb weight | |||
| Weight distribution | |||
| fuel tank capacity | 64.4 litres | 14.2 [17] UK [US] gal. | |
| aerodynamics | |||
| Drag coefficient | |||
| Frontal area | |||
| CdA | |||
| Powertrain | |||
| engine type | naturally aspirated petrol | ||
| Engine manufacturer | Pontiac | ||
| Engine code | LS5 | ||
| Cylinders | V 8 in 90° vee | ||
| Capacity | 7.5 litre 7462 cc (455.359 cu in) |
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| Bore × Stroke | 105.4 × 106.9 mm
4.15 × 4.21 in |
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| Bore/stroke ratio | 0.99 | ||
| Valve gear | overhead valve (OHV)
2 valves per cylinder 16 valves in total |
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| maximum power output (gross) |
340 PS (335 bhp) (250 kW) at 4800 rpm |
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| maximum torque (gross) |
651 Nm (480 ft·lb) (66.4 kgm) at 3600 rpm |
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| Specific output (gross) |
33.5 kW/litre 45.5 ps/litre 44.9 bhp/litre 0.74 bhp/cu in |
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| Specific torque (gross) |
87.24 Nm/litre
1.05 ft·lb/cu3 |
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| Engine construction | cast iron block & head | ||
| Lubrication | wet sumped | ||
| compression ratio | 8.4:1 | ||
| Fuel system | 1 carburettor | ||
| bmep (brake mean effective pressure) | 1096.3 kPa (159 psi) | ||
| Maximum RPM | |||
| crankshaft bearings | |||
| Engine coolant | Water | ||
| Unitary capacity | 932.75 cc | ||
| Aspiration | Normal | ||
| Compressor | N/A | ||
| Intercooler | None | ||
| Catalytic converter | N | ||
| performance | |||
| Acceleration 0-80km/h (50mph) | |||
| Acceleration 0-60mph | |||
| Acceleration 0-100km/h | |||
| Acceleration 0-160km/h (100mph) | |||
| Standing quarter-mile | |||
| Standing kilometre | |||
| Maximum speed | |||
| Power-to-weight ratio | |||
| Weight-to-power ratio | |||
| fuel consumption | |||
| Fuel consumption | |||
| universal fuel consumption (calculated from the above) | |||
| litres/100km | |||
| km/litre | |||
| UK MPG | |||
| US MPG | |||
| Carbon dioxide emissions | |||
| Carfolio Calculated CO2 ? | |||
| VED band (UK) | |||
| CO2 Effizienz (DE) | |||
| chassis | |||
| Engine position | front | ||
| Engine layout | longitudinal | ||
| Drive wheels | rear wheel drive | ||
| Torque split | N/A | ||
| Steering | |||
| turns lock-to-lock | |||
| Turning circle | |||
| Front suspension | |||
| Rear suspension | |||
| Wheel size front | 7 x 14 | ||
| Wheel size rear | 7 x 14 | ||
| Tyres front | F70-14 | ||
| Tyres rear | F70-14 | ||
| Brakes F/R | Di/Dr | ||
| Front brake diameter | 277 mm | ||
| Rear brake diameter | 241 mm | ||
| Braked area | |||
| Gearbox | 4 speed manual | ||
| Top gear ratio | 1 | ||
| Final drive ratio | 3.42 | ||
| general | |||
| Carfolio.com ID | 462297 | ||
| Production total | |||
| Model code | |||
| RAC rating | 55.1 | ||
| Insurance classification | No information available | ||
| Tax band | No information available | ||
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1971 Pontiac Firebird Formula 455 HO added 2016-03-21. Last modified 2020-03-16. |
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