Nissan MA engine

The Nissan MA engine is a straight-4 SOHC 0.9 L, 1.0 L, or 1.2 L engine introduced in 1982 by Nissan, intended primarily for the K10 series Micra/March model. It shares design elements with the older E engine, such as 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 the high flame speed in the compact combustion chambers.

Nissan MA engine
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 per cylinder
Compression ratio	7.7:1, 8.0:1, 9.0:1, 9.5:1
Combustion
Turbocharger	Single turbocharger (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

MA09ERT

The MA09ERT is a twin-charged design (possessing both a turbocharger and a supercharger), an unusual design, particularly for Japanese vehicles.^[1] 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 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 region. 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 torque range. Other changes included a reduction of engine capacity from 988 cc to 930 cc; this strengthened the engine by increasing the bore wall thickness 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 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.

MA09ERT engine

Specifications

• Water-cooled inline-4, air-to-air intercooler
• Valve system: SOHC, 2 valves per cylinder
• Displacement: 0.9 L; 56.8 cu in (930 cc)
• Bore and stroke: 66 mm × 68 mm (2.60 in × 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 mm × 575 mm × 680 mm (27.8 in × 22.6 in × 26.8 in)
• Specific fuel consumption (net): 255 g/(PS･h) at 1200 rpm

MA10S

MA10S engine from a '90 Nissan Micra

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 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
• 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

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

MA10ET engine

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

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 and stroke: 71 mm × 78 mm (2.80 in × 3.07 in)
• Maximum power: 60 PS (44 kW; 59 hp) at 5600 rpm
• Maximum torque: 94 N⋅m (69 lb⋅ft) at 3600 rpm
• Compression ratio: 9.0:1

See also

• List of Nissan engines