1974
We keep the essential and we start by changing the front and rear of the car. New facelift for 1974 so with the introduction of rubber bumper (urethane) to meet the new norms. Indeed, the bumpers must withstand impacts less than 15mph without deformation.
The front grid are recognizable by its vertical grid and turn signals are under the headlights. The rear saw the lights stretched to the plate. 1974 is also the last year of the "performance" engines and moreover the T/A with its 250hp 455ci, the motor SD-455 (Super Duty) made his last seen under the hood. 290hp strong, this is the last time the T/A does not benefit only the most powerful engine. 943 T/A and 85 Formula received the 455 SD, but only 58 had the shaker.
Finally, the steering becomes standard for all the firebird and the "ignition / seat belt interlock", literally "anti startup if you do not have your belt" made its appearance.
Surrender of TH400 transmission certainly solid but incompatible with the size of the catalysts of the following year. Last year also for the double exhaust systems for the same reason.
Some magazine admitted that the Firebird 455 equipped outperformed the Corvette in performance.
Below the specificities of 3 finishes with pictures
- FIREBIRD (base-esprit)
SPECIFICATIONS Model/Year Firebird base and Esprit 1974Engine L6 OHV V8 OHVDisplacement 250ci (4087cm3) 350ci (5722cm3)Bore/Stroke 3,87x3,53"(98,3x89,6mm) 3,87x3,75"(98,3x95,2mm)horsepower 100HP@3600rpm 155HP@3600rpm 170HP@4000rpmTorque 236Nm@1600rpm 372 et 392Nm@2400rpmCompression 8.2:1 7.6:1Carburetor 1 corps 2 corpsTransmission 3 auto or4 manualSteering assitée à recirculation de billesRatio de 16.5:1 à 14.3:1Turning Radius 38,9ft (11,85m)Steering wheel 2,41 toursWheels/Tires 14x7"Brakes disques / tamboursFront suspension ressort/amortisseur/barre anti roulis de 0.938 "Rear suspension lames/amortisseur/barre anti roulis de 0.625" (option)Body autoporteuse avec faux chassis avantWheelbase 108 inch (2,74m)Overhall lenght 196 inch (4,98m)Overhall width 73 inch (1,85m)Front tread 61,3 inch (1,56m)Rear tread 60 inch (1,52m)Overhall height 49,2 inch (1,25m)Weight (base) 3283lbs (1492kg) 3504lbs (1661kg)Fuel tank Capacity 20,2 Gallons (76,45 litres)Oil tank Capacity 5 quarts (4,7 litres)Base price (no option) 3175$ de 3305 à 3527$
- FORMULA
Here is the Patrick Rondat's 100% stock Formula 400.
SPECIFICATIONS Model/Year Firebird Formula 1974Engine V8 OHVDisplacement 350ci (5722cm3) 400ci (6540cm3) 455ci (7440cm3)Bore/Stroke 3,87x3,75"(98,3x95,2mm) 4,12x3,75"(104x95,2mm) 4.15x4.21"(105x107mm)horsepower 170HP@4000rpm 200HP@4000rpm 250HP@4000rpm 290HP@4000rpm (SD)Torque 392Nm@2400rpm 447Nm@2400rpm 514Nm@2800rpm 534Nm@3200rpm (SD)Compression 7.6:1 8.0:1 8.0:1Carburetor 2 corps 4 corpsTransmission 3 auto ou 4 manuelleSteering assitée à recirculation de billesRatio de 16.5:1 à 14.3:1Turning Radius 38,9ft (11,85m)Steering wheel 2,41 toursWheels/Tires Brakes disques / tamboursFront suspension ressort/amortisseur/barre anti roulis de 1 "Rear suspension lames/amortisseur/barre anti roulis de 0.625"Body autoporteuse avec faux chassis avantWheelbase 108 inch (2,74m)Overhall lenght 196 inch (4,98m)Overhall width 73 inch (1,85m)Front tread 61,6 inch (1,56m)Rear tread 60,3 inch (1,53m)Overhall height 49,2 inch (1,25m)Weight (base) 3548lbs (1612kg)Fuel tank Capacity 20,2 Gallons (76,45 litres)Oil tank Capacity 5 quarts (4,7 litres)Base price (no option) 3614$ 3711$ de 3768 à 4289 $
- TRANS AM
SPECIFICATIONS Model/Year Firebird Trans Am 1974Engine V8 OHVDisplacement 400ci (6540cm3) 455ci (7440cm3)Bore/Stroke 4,12x3,75"(104x95,2mm) 4.15x4.21"(105x107mm)horsepower 200HP@4000rpm et 225HP@4000rpm 250HP@4000rpm 290HP@4000rpm (SD)Torque 447Nm@2000rpm 514Nm@2800rpm 534Nm@3200rpm (SD)Compression 8.0:1Carburetor 4 corpsTransmission 3 auto ou 4 manuelleSteering assitée à recirculation de billesRatio de 16.5:1 à 14.3:1Turning Radius 38,9ft (11,85m)Steering wheel 2,41 toursWheels/Tires GR 70/15 (225/70/15) sur jante 15x7"Brakes disques / tamboursFront suspension ressort/amortisseur/barre anti roulis de 1.250"Rear suspension lames/amortisseur/barre anti roulis de 0.812"Body autoporteuse avec faux chassis avantWheelbase 108,1 inch (2,74m)Overhall lenght 196 inch (4,97m)Overhall width 73 inch (1,85m)Front tread 61,2 inch (1,55m)Rear tread 60,3 inch (1,53m)Overhall height 50,4 inch (1,28m)Weight (base) 3655 lbs (1661kg)Fuel tank Capacity 20,2 Gallons (76,45 litres)Oil tank Capacity 5 quarts (4,7 litres)Base price (no option) 4351 à 4929$