Does your car have to be extremely modified to get large fuel injectors?

Question

I Drive an 04 mustang gt I have flomaster exhaust and K&n cold air intake kit would now be a good time to get bigger fuel injectors?

Answer 1

Injecting more fuel is useless unless the engine is also taking in more air. Because engines don't run on fuel, they run on a perfect ratio of fuel and air. (called "stochiometric".) Any other ratio doesn't make more power, it just makes pollution.

The engine computers know how to inject fuel so you have the perfect ratio of fuel to air. Usually, the hard part is getting more AIR into the engine, at which point the computer will automatically inject more fuel. That's why you went with the intake kit and exhaust.

If you kept modding the engine, eventually you'd have so much air going through it that the injectors couldn't keep up and you'd go lean at wide-open throttle and certain RPM's. I doubt the intake and exhaust stuff would be enough to cause that, but a quick run on the dyno would tell you for sure. Or the PCM might blow a code to tell you...

Answer 2

No. Your injectors shoud be good to around 350hp, and you are no where near that. If you're worried about fuel supply, get an adjustable fuel regulator and turn up the fuel pressure.