Here is a comparison of N54 intake and S54 airbox. WOT done same place and exhaust setting. Flap closed.
The weather was also similar for both WOTs.
Even though I have a slightly bad desing S54 airbox, it still beats the N54 Intake.
I should have run the S54 with the airbox also with the exhaust flap open Log.
I noticed today that with the exhaust flap open, the N54 intake gets better results if I run the flap open for a longer time. At first I thought that the car runs worse with the flap closed. I was wrong about that.
Blue= N54 intake
Green= S54 airbox.
