Can anyone tell me what the stock fuel injectors can handle on the 2015 Honda Fit? I ask because despite opening up the exhaust and intake, my air fuel ratio stays relatively the same. Out of all the cars I have owned, I have never seen this. The only time the air/fuel ratio changed is either when something wasn't hooked up properly on the intake side, a modification made post the maf sensor to allow unmetered air in or if the maf sensor diameter was made to be wider than stock. This is expected though.

I'm really interested in this since I'm wondering how adding forced induction with a moderate amount of boost (5psi) will be handled by the stock ECU. It sure is handling everything fine so far it seems. Thanks for any input.