[nate89]

Reduce the volume of the set of equal length exhaust manifold and exhaust manifold is also new design, put it more directly under the catalyst, which accelerate the activation of the catalyst to reduce heat loss during startup. Due to the small amount of hazardous materials generated by the improved combustion The amount of the precious metal catalyst is 30% lower that the catalyst cost by half.


In terms of cooling, while the portion of the cylinder block around the combustion chamber is cooled enough to adopt two cooling systems to maintain temperature. Hakatsu to reduce both the friction reduction and cooling loss of the cylinder to balance the promotion of new warm air can even bypass passage bottom.

To reduce friction, circular bore machining, drilling bore when assembled dummy head that has worked to make the axial force on the stud. But the European luxury car engine approach, more recent years to reduce friction, which is also used for the engine Nissan March.

Piston, connecting rod about 20% of the conventional level of weight reduction. Rorarokkaamu expression and the valve drive also has to reduce friction and also by lowering the two-stage pressure relief oil pump relief.

The engine weight, cast aluminum front cover, AVCS conventional equipment due to the four types from the EJ20 is a little heavy.


FB-type performance, fuel economy of about 10%, about 3% acceleration, with low acceleration accelerator opening, the response acceleration in the range of practical means to achieve a better acceleration feel.

The FB type is announced today but have been tuned specifically for the naturally aspirated, with regular gasoline specifications, however, feel that the output is somewhat unsatisfactory. You did not have lingering than if converted to suppress the reverse.

As a future development course, cylinder head, special design of the turbo by pistons and connecting rods, etc., can be considered as direct.

This engine is considered the prototype of the underlying engine in the Subaru and span the next 10 years. In the future, but seems to have been downsizing also consider the concept, to realize it is expected to take some time.

I really like the oil filter location, but the 10.5 compression ratio. Thats good for N/A power, but not if you're planning on adding a turbo.