Does anyone have an idea how much mileage you lose upgrading to either 850CC or 1000CC injectors? Bad enough these cars have crappy gas mileage but I'm wondering if I should add them to my next round of installs.

 

If tuned properly, gas milage will not change due to injectors. Only thing bigger injectors help with is for the WOT part of the tune, to make sure there's enough headroom for the extra needed fuel.

 

Thank you.