blue5.0

Why is it that the f150 5.0 is a flex fuel vehicle and the mustang gt is not? 12th gen at least as far as the f150 goes.

RLXXI

Good question. Let me know when you find out.

NOT!!!...... lol, my mom (82 years young) has a 15 Stang and I can't stand the thing, Getting in and out is like trying to put on and take off over the calf tube socks wearing skinny jeans.
.

isthatahemi

I'm concerned you know how that feels first hand lol (the skinny jeans part).
j/k

blue5.0

I'm not in the market for a mustang...yet. I'm just curious why the mustang guys have to get a tune and swap to 47 lb injectors bare minimum to run e85, as I run nitrous and e85 on my stock fuel system.

BadCon

There is an associated cost with going flex fuel capable, so the manufacturer has to determine the available utility this capability offers as compared to the cost they either need to absorb or pass on to the consumer in a higher retail cost. With the F150, there is a large portion of truck owners who do truck things in rural areas and another subset of owners who are fleet customers. Both of these owner populations could benefit from being able to use E85, especially fleet operators and governments who may make ethanol use mandatory for legislative reasons. To accommodate these people, they fitted the F150 with a fuel pump and injectors capable of meeting the E85 fuel flow requirements, in addition to ethanol sensors and compatible fuel components. These parts may cost more then whatever is put in the Mustang, but the increased utility offsets that cost.

Additionally we must not forget the higher horsepower output the mustang offers, which could have again increased the fueling requirements necessary to supply E85 for the higher Mustang 5.0 output. The F150 5.0 does not come with 47lb injectors stock, but is still able to use E85...perhaps the difference between the base F150 5.0 output and the Mustang 5.0 output is the difference in fuel injector requirements. Ethanol requires a lot of fuel flow...

blue5.0

Aren't the injectors the same? What is the difference in the fuel pump?

Summers22

iTrader: (2)

If the injectors are the same, then why did you say Mustang owners have to swap them?

blue5.0

I don't really understand what you are saying. Mustang owners do have to swap 247 pound injectors to run e85 and f150 owners do not. I believe the mustang GT and F150 share the same injector.

blue5.0

*swap to 47 lb injectors....

BadCon

You are correct, both the Mustang and the F150 come with 38lb injectors IIRC. I think this has more to do with the higher total overall power output of the Mustang requiring larger injectors, as a tuned Mustang 5.0 will make more power then a tuned F150 5.0. That said I haven't done the math on the actual flow requirements, but if someone does they could answer this question.

Perhaps if you swapped some headers and a new intake manifold on an F150, it too would require 47lb injectors for E85.