even in ballpark figure terms, how much does larger injectors and fuel rails affect mpg in your experiences?

Thanks

 

depends all on the tune, dont really need a new fel rail if you are under 500hp, but if the car is tuned like it should be then you really wouldnt suffer that much gas mileage unless you were running like say 550's and boosting 20psi everywere


i know on my 92 eg hatch i am running rc310cc's semi untuned for right now and am getting about 22mpg running really rich until the check engine light comes on for the to rich to lean code and then it will settle no farther down than 12.5ish on the wideband

 

Why do you feel you need them?

 

I dont, I was just curious