| Nissan MA engine | |
|---|---|
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| Overview | |
| Manufacturer | Nissan Motors |
| Production | 1983-1992 |
| Layout | |
| Configuration | Inline-4 |
| Displacement | 0.9 L (930 cc) 1.0 L (988 cc) 1.2 L (1,235 cc) |
| Cylinder bore | 66 mm (2.60 in) 68 mm (2.68 in) 71 mm (2.80 in) |
| Piston stroke | 68 mm (2.68 in) 78 mm (3.07 in) |
| Cylinder block material | Aluminium |
| Cylinder head material | Aluminium |
| Valvetrain | SOHC 2 valves x cyl. |
| Compression ratio | 7.7:1, 8.0:1, 9.0:1, 9.5:1 |
| Combustion | |
| Turbocharger | Singleturbocharger (MA10ET) Twincharger (MA09ERT) |
| Fuel system | Fuel injection (MA09ERT, MA10E, MA10ET) Carburetor (MA10S, MA12S) |
| Fuel type | Gasoline |
| Cooling system | Water cooled |
| Output | |
| Power output | 50–110 PS (37–81 kW; 49–108 hp) |
| Torque output | 75–130 N⋅m (55–96 lb⋅ft) |
| Dimensions | |
| Dry weight | 111 kg (245 lb) |
| Chronology | |
| Successor | Nissan CG engine |
TheMA is astraight-4SOHC 0.9 L, 1.0 L, or 1.2 L engine first introduced in 1982 byNissan, intended primarily for the K10 seriesMicra/March model. It shares design similarities with the olderE engine, with an 8-valve hemispherical cylinder head but differs in that it uses an aluminium cylinder block. Unusually, the specified ignition timing for the MA10 running on the specified 90 RONgasoline was 2 degreesafter top dead centre, reflecting a very high flame speed in the compactcombustion chambers.
TheMA09ERT is atwin-charged design (possessing both aturbocharger and asupercharger), an unusual design, particularly for Japanese vehicles.[1] It powered theMarch Superturbo,March R, and theMarch Superturbo R.
The "Nissan PLASMA" (Powerful & Economic, Light, Accurate, Silent, Mighty, Advanced) improved performance and response by adding a supercharger to the (already turbocharged)MA10ET engine, which is a four-cylinder water-cooled OHC engine with a V-type valve arrangement and hemisphericalcombustion chambers, with sequential fuel injection.
The supercharger improved the response and the output in the low-rpm region (where turbochargers are typically less effective), and a new larger HT10 turbocharger aimed to improve output in the high-rpm regions. Anintercooler and an updated intake manifold were added, the latter having a much largerthrottle body and improvedfuel rail. The result was an increase in output to 110 PS (81 kW; 108 hp) from 85 PS (63 kW; 84 hp), and a much broader range oftorque. Other changes included a reduction of engine capacity from 988 cc to 930 cc; this strengthened the engine by increasing the bore wall thicknesses by 1 mm, and allowed cars using it to enter sub-1300 cc competition classes not otherwise possible due to conversion factors applied toforced induction engines.
The first prototypes of these engines were installed in theMarch Superturbo R/March R (EK10FR type) in 1988; shortly thereafter the engine was installed in theMarch Superturbo.
The MA09ERT was the first twincharged engine available in Japan; series charging combines the increased low-speed torque of supercharging with the increased high-speed torque and power of turbocharging. The presence of the supercharger also minimizes the effects ofturbo lag.
 MA09ERT engine |
TheMA10S is an engine with an electronically controlled carburetor. It was used in theBe-1 and 1982–1992Micra (K10) andPao. It has ahemi-head and, unusually, the spark is fired after top dead centre because of the very high flame speed in a compact engine with this head design. Compression in the 50 PS (37 kW) version was relatively low so that it was able to run on 90 RON petrol where available.
TheMA10E was used in theNissan Saurus Jr.
TheNissan MA10ET powered theFigaro and K10March Turbo.
The MA12S is the designation for the larger 1.2 L (1,235 cc) engine, featuring an enlarged bore as well as stroke. It was used in theNissan Micra K10.
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