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1961 Datsun Bluebird 311
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The Datsun 311 went into production in November 1960 and continued on until August 1961. The 311 is pretty well identical to the previous 310 model in every way, except to the engine. 
Nissan had been hard at work modifying the previous E series engine, and for the new E-1 engine thanks to a new dual throat downdraught Nikki carburettor with a vacuum secondary system, and some modifications to the cylinder head design, the new E1 engine boasts a twenty percent increase in power over the previous E engine. The new 1189cc OHV E1 engine now produces 60hp at 5000rpm. The truly impressive thing about this new engine was that this particular family of engines began it's life as an Austin engine, which Nissan were building under licence during the 1950s. Thanks to the American engineer Donald Stone, and also Nissan's own engineers, this engine was now producing more power than anything Austin could achieve with their own design. In 1961 the Bluebird with it's single carburettor boasted 60hp, at the same time the most powerful Austin version was in the Austin Healey Sprite, this engine, fitted with twin SU carburettors, could only manage 48hp. Not only were they more powerful, they were also totally reliable, and Nissan (or more to the point Donald Stone) completely solved the oil leak problems which plagued the Austin engines. A base model version with the 988cc 45hp C-1 engine was also offered at the same time. 
The grille on the 311 is the same as the previous 310, and is a narrow design with the indicators set either side of the grille. The later 312 model Bluebirds had a grille that partially enclosed the indicators. 
  The tail lights on these early cars are a small kidney shape, later models have a larger upright bullet shape. The dashboard in the 310 and 311 series slopes backwards at about 20deg., in the 312 series the dash is more upright. These early models feature a pronounced droop at the back of the car, in the fold that travels along the side of the car. The fold runs straight along the side of the car, and then inexplicably drops downward at about a 75o angle about 3 inches from the tail light. On the 312 this fold is straight right through to the back of the car. Standard model 311s have no strips along the side of the car, but the deLuxe models feature a full length stainless steel strip. DeLuxe models also have stainless steel door window frames. The dashboard in the 310 and 311 series slopes backwards at about 20o, in the 312 series the dash is more upright, and is near vertical. Badges on the side of the car say Bluebird. and at the back of the car theu say either Datsun 1200 or Datsun 1000, depending on which engine was used. 
 The 311 was replaced in August 1961 with the Datsun Bluebird 312.

Datsun Snowbird ? 
 Nissan were originally going to call the 310 series cars the Datsun Snowbird, until someone pointed out that the term 'snowbird' was actually a 1950s American slang term for a cocaine addict. Late in the day they changed the name to Bluebird. No reason was given for the source of the new name, but it can't have escaped Nissan's attention that Donald Campbell was about to attempt to break the world speed record in a car named Bluebird. 
 This wasn't the only time the Japanese had to change a potentially inappropriate car name. In the 1990s Toyota were about to release their new large family sized car in Australia, which was to be called the Toyota Centaur. In 1943 a Japanese submarine torpedoed an Australian Naval Hospital ship, that was clearly marked with red crosses, called the HMAS Centaur off the coast of Brisbane killing most of the 300+ injured people onboard. After this was pointed out to the local Toyota executives they decided to re-name it the Toyota Avalon. 
 A similar problem occured for Subaru when the wanted to sell the Subaru Legacy in Australia. Legacy is the name of an organisation in Australia that supplies aid to war veterans from the Second World War, in the interest of good taste Subaru sold the car in Australia as the Liberty. 
 Most famously of all, Mitsubishi found out just in time that the Mitsubishi Pajero off roader they were planning on selling in Spain mightn't sell very well with that name, because pajero is a Spanish slang term meaning wanker.

A Japanese language sales brochure for the 311 


There were several different model variations for the 310 series, and these can usually be identified by their model code. If the model code begins with a W, then the vehicle is a wagon. P is the code meaning 'power up', which is Nissan speak for a larger engine. If a 310 series car is a P310, then it has an E series engine, if it is just a 310, then it has the C series engine. L indicates that the car is a left hand drive version.
1961 Datsun 311     
Specifications 
Length - 3910mm   
Width - 1496mm   
Height - 1460mm   
Wheelbase - 2280mm   
Weight - 870kg   
Top speed - 1000 unknown   
          - 1200 125kph 
Transmission - Column change 4 speed 
...........................................................................................
Final drive   
1000 - unknown   
1200 - 4.625 : 1

Engine Specifications 
1000 Engine   
Model - C-1 
OHV 4 Cylinder 
Capacity - 988cc   
Bore & Stroke 73x59mm   
Power - 45bhp@4600rpm   
Torque - 7.2kg/m@4000rpm   
Compression - 8.0 : 1   
Carburettor - Nikki dual throat down draught 

Engine Specifications 
1200 Engine 
Model - E-1 
OHV 4 Cylinder  
Capacity - 1189cc   
Bore & Stroke 73x71mm   
Power - 60bhp@4800rpm   
Torque- 67ft/lb@3600rpm   
Compression - 8.2 : 1   
Carburettor - Nikki 2D-30C dual throat down draught   
 

Model Variations
Datsun WP311  
 The Datsun WP311 is the station wagon version of the Datsun 310 sedan. It was introduced at the same time as the sedan. It features a two piece cargo door, with a framed glass section that opens upwards, and a lower section that folds downwards. 
 Mechanically it is the same as the sedan.
Datsun 311 Standard Model  
 A standard model of the 311 was also available. The standard 311 had stainless steel strips that run along the side of the car, but they are a narrow profile and are only about 1cm wide, the deLuxe models have strips that are at least twice as wide. The Standard model also has painted door window frames, where the deLuxe has stainless steel frames.
 

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