Autosport web is reporting Nissan's 2nd fresh engine (Nissan general director Motohiro Matsumura interview).
https://www.as-web.jp/supergt/511494?all
*Matsumura says that the development of the 2nd fresh engine is not delayed.
*Rivals (Lexus, Honda) had already introduced pre-chamber engine.
*Matsumura says that the pre-chamber that covers the spark plug in the combustion chamber has the advantage of improving peak power, but it also has the disadvantage of maintaining stable combustion in the transient region.
*Compared to F1, which uses special fuel, GT500, which has to use commercial high-octane gasoline, seems to have a negative effect.
*Matsumura says that basic research (about pre-chamber) is almost over. I think that there is a good effect, so it is one of the option. The question is what to do with the concept of combustion in total, and pre-chamber is prohibited in Class 1 (common regulations with DTM). So we have to think about whether we want an engine that supports both GT500/Class 1 category. I don't mention if our 2nd fresh engine has a pre-chamber.