Quote:
Originally Posted by Japanese Samurai
AUTOSPORT published the interview article on Ryuichi Matsui of TRD (About 09 engine).
GTA and three manufacturers decided the design of the 09 engine of FN and S-GT to be shared in 2006.
09 engine is 3.4 liters, 90-degree engine.
The bore diameter of 09 engines is provided 93mm or less in 09 regulation.
Therefore, stroke is decided about 62.6mm because of the engine displacement.
This is "short-stroke" type engine.
However, because the use of air-restrictor is obligated, the short-stroke type engine is not suitable for S-GT.
It is because the long-stroke type is more advantageous to improve the compression ratio.
The torque of 09 engine is more insufficient than that of 08 engine (4.5 liters).
Therefore, 09 engines increase the engine rotational speed.
The maximum speed of 09 engine is about 9000 rotations. (08 engine is about 8000 rotations, FN engine is 10300 rotations with the limiter.)
Many of parts for FN and S-GT are common for the cost reduction.
The valve and the piston use parts only for GT though the crankshaft is common.
Toyota improve the suction system, and have improved the engine performance during the season by ten horsepower or more.
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Will Nissan adopt the 3.4L V8?
Will the air-restrictors be removed?