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:

http://mirageforum.com/forum/attachm...1&d=1381201002

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

Attachment 5045

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:

http://mirageforum.com/forum/attachm...1&d=1381201560

http://mirageforum.com/forum/attachm...1&d=1381201560

http://mirageforum.com/forum/attachm...1&d=1387850321
Source: http://www.jsae.or.jp/e07pub/yearboo...ne_engines.pdf

This explains why the 1.0L hasn't made it to many developing countries. The 1.0L touts 11.5:1 compression ratio! If you don't have high quality fuel you're going to have issues with that high of a compression ratio.

This 1l engine is more efficient then the 1.2l wish we could have the 1l as an option here in OZ.

We could use more images of engines and/or engine bays. If any of you guys can snap a picture it would be appreciated.

Added to first post: torque curve & additional info & images about this engine, from http://www.mitsubishi-motors.com/en/...S_EnP_3A90.pdf

Interesting and good info Darin.

If the 1.0 litre would of been a option in the states i'd of easily gotten it. The 5 to 7 more hp of the 1.2 litre really isnt important in a car like this. Granted its already hard enough finding parts for the 1.2 so i'd hate to have a car with a even less common engine option.

Heres hoping for a 1.0 turbo in the future so I can trade up.

Probably we are going to have the 1.1 Turbo next year. If the MPG will be a like or better to Fiesta's Ecoboost and price is right, then it's going to be a brilliant car.

Quote:

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Originally Posted by Clessy

If the 1.0 litre would of been a option in the states i'd of easily gotten it.

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Me too.

FYI, started a poll on the topic: Poll: 1.0L Mirage engine = 7.5% better fuel economy. Would you choose it?

Bumping an old thread with a new question....so the 1.0 uses an EGR port while the 1.2 has no EGR? If true I wonder if the 11.5/1 compression on the 1.0 needs EGR to stay cool?