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Nissan A engine
The Nissan A series of internal combustion gasoline engines have been used in Datsun and Nissan brand vehicles. Displacements of this four-stroke engine family ranged from 1.0-liter to 1.5-liter and have been produced from 1967 until 2009. It is a small-displacement four-cylinder straight engine. It uses a lightweight cast iron block and an aluminum cylinder head, with overhead valves actuated by pushrods.
The Nissan A engine design is a refined, quiet and durable gasoline engine. It appears to be a modern replacement of the earlier iron-headed Nissan C and Nissan E engines and is of similar dimensions. The 1960s A series was an all-new design from newly acquired Aichi Kokuki, and a departure from Nissan's BMC B-Series engine derived designs of the 1950s (Nissan was a licensee of Austin Motor Company technology). A major improvement over the BMC-based designs was locating the camshaft on the right side of the engine rather than the left where the inlet and exhaust ports were located. This meant that the pushrods no longer intruded on the ports, allowing for eight individual ports instead of the original five, and the new engine used an oil pump mounted to the right side of the block rather than behind the rear of the camshaft. As production continued, 1974 and newer A-series engines had different block castings, with relocated motor mount bosses. The A-series engine was also used by India's Premier Automobiles Limited.
The A10 is a 1.0-liter (988 cc) engine, released in September 1966 in the 1967 model year Datsun 1000. The A10 featured a three main bearing crankshaft. Bore was 73 mm and stroke was 59 mm (same as the Nissan C engine). With a two-barrel Hitachi carburetor and an 8.5 to 1 compression ratio this engine produced 62 PS (46 kW; 61 hp) at 6000 rpm and 8.5 kg⋅m (83 N⋅m; 61 lb⋅ft). The Datsun 1000 Coupé, introduced in Sept 1968, was equipped with an uprated A10 engine boasting a free flowing dual outlet exhaust manifold with increased compression, now 9 to 1. With a revised carburetor, this engine produced 66 PS (49 kW; 65 hp). Export versions of the A10 as installed in the Datsun 100A produced 59 PS (43 kW; 58 hp) SAE at 6000 rpm and 8.3 kg⋅m (81 N⋅m; 60 lb⋅ft) at 4000 rpm.
A belt-driven SOHC version of the A10 was built as the E10 into the early nineties.
The A12 is a 1,171 cc (1.2 L; 71 cu in) engine with a 73 mm (2.9 in) bore, like the previous A10 engine, but with its stroke increased to 70 mm (2.8 in). With five main bearings on a forged steel crankshaft, the engine is extremely smooth and durable. The two-barrel (twin-choke) Hitachi carburettor was significantly improved with the addition of a power valve circuit. In Japanese specs, the original A12 engine with a twin-choke carburettor produced 68 PS (50 kW; 67 hp) at 6000 rpm and 95 N⋅m (9.7 kg⋅m; 70 lb⋅ft) of torque at 3600 rpm. There were also single carb and twin carb versions available.
A special version of the A12 called the "A12 GX" engine, was available (A12GX or A12T for front-wheel drive applications). With twin Hitachi sidedraft carburetors, a longer duration camshaft and 10:1 compression ratio, it delivered 83 PS (61 kW; 82 hp) at 6400 rpm, up over 20 percent from a standard A12 engine. The GX engine was offered in Japanese Domestic Market Nissan Sunny 1200 GX sedans and coupes. The identical specification A12T engine was offered in the front-wheel-drive Nissan Cherry X-1.
An overbored version of the A12 was used in period race cars, including Nissan factory (works) racing Sunnys. Many were overbored from the original 73 mm (2.9 in) to 76.76 mm (3.022 in) using Tomei forged pistons for a displacement of 1,296 cc (79.1 cu in), while others used 76 mm (3.0 in) Datsun Competition forged pistons, for a displacement of 1,270 cc (78 cu in). These legendary engines competed in Japan's Touring Sedan (TS) class races against the 1200s archrival Toyota Starlet.
Perhaps the most interesting variety of A series engines was the AY12 engine. This was a special race-only Nissan factory (works) racing version with a crossflow cylinder head.
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Nissan A engine
The Nissan A series of internal combustion gasoline engines have been used in Datsun and Nissan brand vehicles. Displacements of this four-stroke engine family ranged from 1.0-liter to 1.5-liter and have been produced from 1967 until 2009. It is a small-displacement four-cylinder straight engine. It uses a lightweight cast iron block and an aluminum cylinder head, with overhead valves actuated by pushrods.
The Nissan A engine design is a refined, quiet and durable gasoline engine. It appears to be a modern replacement of the earlier iron-headed Nissan C and Nissan E engines and is of similar dimensions. The 1960s A series was an all-new design from newly acquired Aichi Kokuki, and a departure from Nissan's BMC B-Series engine derived designs of the 1950s (Nissan was a licensee of Austin Motor Company technology). A major improvement over the BMC-based designs was locating the camshaft on the right side of the engine rather than the left where the inlet and exhaust ports were located. This meant that the pushrods no longer intruded on the ports, allowing for eight individual ports instead of the original five, and the new engine used an oil pump mounted to the right side of the block rather than behind the rear of the camshaft. As production continued, 1974 and newer A-series engines had different block castings, with relocated motor mount bosses. The A-series engine was also used by India's Premier Automobiles Limited.
The A10 is a 1.0-liter (988 cc) engine, released in September 1966 in the 1967 model year Datsun 1000. The A10 featured a three main bearing crankshaft. Bore was 73 mm and stroke was 59 mm (same as the Nissan C engine). With a two-barrel Hitachi carburetor and an 8.5 to 1 compression ratio this engine produced 62 PS (46 kW; 61 hp) at 6000 rpm and 8.5 kg⋅m (83 N⋅m; 61 lb⋅ft). The Datsun 1000 Coupé, introduced in Sept 1968, was equipped with an uprated A10 engine boasting a free flowing dual outlet exhaust manifold with increased compression, now 9 to 1. With a revised carburetor, this engine produced 66 PS (49 kW; 65 hp). Export versions of the A10 as installed in the Datsun 100A produced 59 PS (43 kW; 58 hp) SAE at 6000 rpm and 8.3 kg⋅m (81 N⋅m; 60 lb⋅ft) at 4000 rpm.
A belt-driven SOHC version of the A10 was built as the E10 into the early nineties.
The A12 is a 1,171 cc (1.2 L; 71 cu in) engine with a 73 mm (2.9 in) bore, like the previous A10 engine, but with its stroke increased to 70 mm (2.8 in). With five main bearings on a forged steel crankshaft, the engine is extremely smooth and durable. The two-barrel (twin-choke) Hitachi carburettor was significantly improved with the addition of a power valve circuit. In Japanese specs, the original A12 engine with a twin-choke carburettor produced 68 PS (50 kW; 67 hp) at 6000 rpm and 95 N⋅m (9.7 kg⋅m; 70 lb⋅ft) of torque at 3600 rpm. There were also single carb and twin carb versions available.
A special version of the A12 called the "A12 GX" engine, was available (A12GX or A12T for front-wheel drive applications). With twin Hitachi sidedraft carburetors, a longer duration camshaft and 10:1 compression ratio, it delivered 83 PS (61 kW; 82 hp) at 6400 rpm, up over 20 percent from a standard A12 engine. The GX engine was offered in Japanese Domestic Market Nissan Sunny 1200 GX sedans and coupes. The identical specification A12T engine was offered in the front-wheel-drive Nissan Cherry X-1.
An overbored version of the A12 was used in period race cars, including Nissan factory (works) racing Sunnys. Many were overbored from the original 73 mm (2.9 in) to 76.76 mm (3.022 in) using Tomei forged pistons for a displacement of 1,296 cc (79.1 cu in), while others used 76 mm (3.0 in) Datsun Competition forged pistons, for a displacement of 1,270 cc (78 cu in). These legendary engines competed in Japan's Touring Sedan (TS) class races against the 1200s archrival Toyota Starlet.
Perhaps the most interesting variety of A series engines was the AY12 engine. This was a special race-only Nissan factory (works) racing version with a crossflow cylinder head.