# Nissan MA engine

The MA is a straight-4 SOHC 0.9 L, 1.0 L, or 1.2 L engine first introduced in 1982 by Nissan, intended primarily for the K10 series Micra/March model. It shares design similarities with the older E 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 RON gasoline was 2 degrees after top dead centre, reflecting a very high flame speed in the compact combustion chambers.

## MA09ERT

The MA09ERT is a twin-charged design (possessing both a turbocharger and a supercharger), an unusual design, particularly for Japanese vehicles. It powered the March Superturbo, March R, and the March 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 hemispherical combustion 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. An intercooler and an updated intake manifold were added, the latter having a much larger throttle body and improved fuel 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 of torque. 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 to forced induction engines.
The first prototypes of these engines were installed in the March Superturbo R/March R (EK10FR type) in 1988; shortly thereafter the engine was installed in the March 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 of turbo lag.

### Specifications

* Water-cooled 4-cylinder inline, air-to-air intercooler
* Valve system: SOHC, 2 valves per cylinder
* Displacement: 0.9 L; 56.8 cu in (930 cc)
* Bore: 66 mm (2.60 in)
* Stroke: 68 mm (2.68 in)
* Maximum power: 110 PS (81 kW; 108 hp) at 6500 rpm
* Maximum torque: 13.3 kg⋅m (130 N⋅m; 96 lb⋅ft) at 5200 rpm
* Compression ratio: 7.7:1
* Weight: 111 kg (245 lb)
* Size (length × width × height): 705×575×680 mm
* Specific fuel consumption (net): 255 g/(PS･h) at 1200 rpm

## MA10S

The MA10S is an engine with an electronically controlled carburetor. It was used in the Be-1 and 1982–1992 Micra (K10) and Pao. It has a hemi-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.

### Specification

* Water-cooled inline-4 cylinder
* Displacement: 988 cc (1.0 L; 60.3 cu in)
* Bore and stroke: 68 mm × 68 mm (2.68 in × 2.68 in)
* Compression ratio: 9.5:1
* Maximum power (net): 52 PS (38 kW; 51 hp) at 6000 rpm
* Maximum torque (net): 75 N·m (55 lb·ft) at 3600 rpm
* 1-bbl carburettor
* K10 March G series Middle 2 model MA10S engine photograph image

## MA10E

The MA10E was used in the Nissan Saurus Jr.
* Displacement: 1.0 L (988 cc)
* Maximum power: 70 PS (51 kW; 69 hp) at 5600 rpm

## MA10ET

The Nissan MA10ET powered the Figaro and K10 March Turbo.
* Displacement: 988 cc (1.0 L; 60.3 cu in)
* Bore and stroke: 68 mm × 68 mm (2.68 in × 2.68 in)
* Maximum power: 76 PS (56 kW; 75 bhp) at 6000 rpm
* Maximum torque: 10.8 kg⋅m (106 N⋅m; 78 lb⋅ft) at 4400 rpm
* Compression ratio: 8.0:1
* Fuel supply device: Nissan Motor ECCS
* Power resource(V-AH): 12-30
* March Turbo Type 1 (A-1) Engine Photograph

## MA12S

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 the Nissan Micra K10.
* Displacement: 1.2 L (1,235 cc)
* Bore: 71 mm (2.80 in)
* Stroke: 78 mm (3.07 in)
* Maximum Power: 60 PS (44 kW; 59 hp) / 5600 rpm
* Maximum Torque: 94 N⋅m (69 lb⋅ft) / 3600 rpm
* Compression Ratio: 9.0:1