I am not convinced that simply improving airflow in an ecu managed car would give noticeable improvement. The ecu would monitor airflow and temperature and change fuel injection to suit? I will look up Graham Bell’s tests he has done. From memory very little, if any bhp increase. If any probably small and at higher revs...
Exactly that. To maintain correct fuel/air ratio more fuel provided so greater power. I agree the improvement will be small and only at the top end. Wouldn't be surprised if I get slight improvement in mpg for same driving style as well though.
Richard
2018 Roadster 3.7 1966 Land Rover S2a 88 2024 Royal Enfield Guerrilla 450 1945 Guzzi Airone