how much worse will my gas mileage get with rc 550cc injectors on my 7mgte, cuz its a dd?

 

it will all depend on that right foot of yours. i have 720's in my tercel and i still get decent mileage if i don't beat on it. your also going to trim those back when your not in boost so you don't keep fowling out your spark plugs. something to think about if your have your heart set on new injectors.

 

What else do you have other than injectors?

 

Are you thinking what I am thinking? Needs Lexus AFM or will run lean and hurt the engine?

 

already got lexus maf

 

He needs something to tune the injectors or it will be pig rich.

If you have the Lex AFM, then get yourself an S-AFC and a wideband. That will let you tune the car and actually enjoy it.........assuming you can tune. If not, F & H can tune it.

 

Im thinking you are dyslexic.

 

If you are already running a lex AFM and you put 550s in they pretty much balance each other out. It wont do much to your gas mileage outside of your driving style.

You should get a tuning device but for now with you having about a 25% increase in both fuel and air they will cancel out and the 7M will be as rich as it is stock.