History
Fiat Abarth OT 1300 sports car
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Manufacturer |
Abarth |
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Production |
1965–1969 |
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Designer |
Mario Colucci |
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Class |
sports/race car |
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Layout |
FR |
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Engine |
1289 cc |
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Transmission |
4/5-speed manual |
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Wheelbase |
79.33 in, 2,015 mm |
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Length |
150.79 in, 3,830 mm |
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Width |
63.78 in, 1,620 mm |
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Height |
40.94 in, 1,040 mm) |
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Ground clearance |
4.92 in, 125 mm |
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Dry weight |
1,444 1b, 655 kg |
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Max speed |
152.2 mph, 245 kmh |
The Fiat Abarth OT 1300 is a series of successful sports racing cars built by Abarth in the 1960s.
History
While the Ferrari GTO was heralded for winning the Division 3 World Touring Car Championship, the Fiat Abarth OT 1300 nearly matched its performance in Division 1. This small car won many important victories for Abarth including the 1966 and 1967 Division 1 World Championships.
The OT 1300 basically had a Simca 1000 chassis floor pans which were heavily modified boxed pressed-steel chassis structure along with modified Fiat 850 components also Simca parts, The car was fitted with a fiber glass body by Designer Engineer Mario Colucci and built in Turin Italy by Sibona & Basano.The OT 1300 also featured suspension modifications similar to those on the OT 1000, including 5.5 in. wheels, front suspension was independent, wishbones, transverse semi-elliptic leaf spring lower arms, anti-roll bar, telescopic dampers while at the rear independent, semi-trailing arms, coil springs, anti-roll bar, and 4 telescopic dampers.
For the engine was designed from the ground up, but was similar to the Simca 1.3-liter they had raced in previous years. It was built at Corso Marche and by Luciano Fochi Hallmarks of the engine that had a cast iron cylinder block and cylinder head of light alloy included five main bearings, twin overhead cams and 2 Weber 45 DCOE-9 horizontal twin barrel carburetors with dual ignition hemispherical combustion chambers .Both the front and rear sections were hinged and provided ample access to the running gear gearbox was full synchromesh 4 speed with option for a 5 speed with more options for various gearbox ratios and final drive.
PERFORMANCE
- Engine capacity: 78.69 cu in, 1,289.517 cu cm
- Fuel consumption: 23.5 ml imp gal, 19.6 ml US gal, 12 1 x 100 km
- Max speed: 152.2 mph, 245 kmh
- Specific power: 120.2 hp/l
- Power-weight ratio: 9.3 lb./hp, 4.2 kg/hp
- Max speeds: 51.6 mph, 83 km/h in 1st gear; 82 mph, 132 km/h in 2nd gear; 105.6 mph, 170 km/h in 3rd gear; 129.9 mph, 209 km/h in 4th gear; 152.2 mph, 245 km/h in 5th gear
Upfront was a noticeable large opening air feed to a front radiator cooling system that was water fitted with electric automatic fan, which was then extracted out of the hood.
To meet homologation requirements over 50 OT 1300s were made in the first year with only 50 Prototype cars were produced exclusively for the purpose of racing on circuits. By 1967, the design was updated starting with the chassis which was widened with the addition of a roof-mounted scoop this Periscopic type air-cooling intake on the rear of the cabin roof which now fed the carburetors cool air.
Overall, both the series I and series II OT 1300s were very successful in races at the time.
Technical
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Fiat Abarth OT 1300 Technical details and specifications (1965-1969)
ENGINE
location rear
4 stroke; cylinders: 4, in line
bore and stroke: 3.39 x 2.19 in, 86 x 55.5 mm
engine capacity: 78.69 cu in, 1,289.517 cu cm
compression ratio: 11.5cylinder block: cast iron
cylinder head: light alloy
dual ignition hemispherical combustion chambers
crankshaft bearings: 5
valves: 2 per cylinder, overhead, Vee-slanted at 80°, thimble tappets
camshafts: 2, overhead
lubrication: gear pump, full flow filter, dry sump
carburation: 2 Weber 45 DCOE-9 horizontal twin barrel carburettors
fuel feed: electric pump
cooling system: water, electric automatic fan, front radiator(options) engine capacities
97.63 cu in, 1,600 cu cm
122.04 cu in, 2,000 cu cm.TRANSMISSION
driving wheels: rear
clutch: single dry plate
gearbox: mechanical; gears: 5+ reverse
synchromesh gears: all
gearbox ratios: 1st 3.090, 2nd 1.940, 3rd 1.500, 4th 1.220, 5th 1.040
(options) 5-speed mechanical gearbox
(options) 5-speed ratios: (1st 2.750 2.500, 2nd 2.200 2.062 1.777, 3rd 1.666 1.578 1.427 1.3631.305, 4th 1.166 1.080 1, 5th 0.961)
gear lever location: central
final drive: hypoid bevel, limited slip
axle ratio: 3.890 (options) 5.429 5.125 4.875 4.375
CHASSIS
type integral boxed pressed-steel chassis
front suspension: independent, wishbones, transverse semi- elliptic leafspring lower arms, anti-roll bar, telescopic dampers
rear suspension: independent, semi-trailing arms, coil springs, anti-roll bar, 4 telescopic dampers.STEERING
screw and sector
turning circle (between walls): 29.5 ft, 9 m
BRAKES
disc (diameter 9.25 in, 235 mm), dual circuit.ELECTRICAL EQUIPMENT
voltage: 12 V
battery: 40 Ah
generator type: alternator, 460 W
ignition distributors: 2, MarelliDIMENSIONS AND WEIGHT
wheel base: 79.33 in, 2,015 mm
front track: 54.13 in, 1,375 mm
rear track: 54.13 in, 1,375 mm
overall length: 150.79 in, 3,830 mm
overall width: 63.78 in, 1,620 mm
overall height: 40.94 in, 1,040 mm
ground clearance: 4.92 in, 125 mm
dry weight: 1,444 1b, 655 kg© Motor car History
Service
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Fiat Abarth OT 1300 Maintenance and Service Guide (1965-1969)
Fuel type : 98-100 oct petrol
Engine sump oil (dry sump): SAE 20W-40, change every 1,200 miles, 2,000 km
Total lubricating system capacity: 14.96 imp pt, 17.97 US pt, 8.5 1
Cooling system capacity: 15.84 imp pt, 19.03 US pt
Gearbox and final drive oil: SAE 90
Greasing: 5 points
Tappet clearances: inlet 0.016 in, 0.40 mm, exhaust 0.016 in, 0.40 mm
Valve timing: inlet opens 47° before tdc and closes 70° after bdc, exhaust opens 70° before bdc and closes 47° after tdc
Normal tyre pressure: front 28 psi, 2 atm, rear 34 psi, 2.4 atm.
Tyres: 4.50 x 13 front, 4.75/5.25 x 13 rear
Fuel tank capacity: 4.4 imp gal, 5.3 US gal (options) 8.8 13.217.6 imp gal, 10.6 15.8 21.1 US gal
Carrying capacity: 353 1b, 160 kg© Motor car History
