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Thread: 3A90 1.0L 3-cylinder Mirage / Space Star engine info (specs, specifications)

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    3A90 1.0L 3-cylinder Mirage / Space Star engine info (specs, specifications)

    Lets start with the 3A90's specs:

    (For info on the 3A92 (1.2L) engine see here: 3A92 Engine Information)

    Displacement: 1.0L (999 CC)
    Cylinders: 3
    Valves: 12
    Maximum Output: 52 kW (71 PS / 70 HP) @ 6000 rpm
    Maximum Torque: 88 Nm (64 lb·ft) @ 5000 rpm
    Bore: 75 mm
    Stroke: 75.4 mm
    Compression Ratio: 11.5:1
    Fuel Delivery: multi point fuel injection
    Fuel type: Unleaded regular gasoline, gasohol E10, E20
    Valve Technology: DOHC, MIVEC (Mitsubishi Innovative Valve timing Electronic Control) - see video: New MIVEC continuously variable valve control mechanism
    Fuel Economy: see Fuel economy ratings by country

    Torque curve:



    Horsepower and Torque comparison: (red 3A92, orange 3A90)

    Name:  3a92vs3a90.jpg
Views: 36005
Size:  54.1 KB

    Additional features:

    - Exhaust manifold with integrated catalytic converter (reduces weight, lowers emissions)
    - Additional weight reduction through: aluminum cylinder block; crankshaft chain case integrated with engine mount
    - EGR module for increased fuel economy, reduced emissions
    - Friction reducing measures: lower rigidity piston skirt; plastic piston coating; lower valve spring loads; smoother camshaft journal; lower oil pump output

    Source: http://www.mitsubishi-motors.com/en/...S_EnP_3A90.pdf

    Images:






    Source: http://www.jsae.or.jp/e07pub/yearboo...ne_engines.pdf
    Attached Images Attached Images     
    Last edited by Daox; 02-15-2013 at 03:00 PM.
    Custom Mirage products: Cruise control kit, Glove box light, MAF sensor housing, Rear sway bar, Upper grill block

    Current project: DIY Nitrous oxide setup for ~$100

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage DE 1.2 manual: 47.2 mpg (US) ... 20.1 km/L ... 5.0 L/100 km ... 56.7 mpg (Imp)


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