Originally Posted by 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.

Originally Posted by blue5.0

I thought they were 32.5 lb injectors nonetheless, I'm guessing you are correct and just overall output is the reason why the mustang needs modifications for e85. I didn't know if there was any other difference with the pump or fuel system. I run the boss intake and longtubes with e85 fwiw. I also run an e85 nitrous tune on my stock pump setup. I'm going to log the crap out of it here soon to make sure I have enough fuel. Initial logs looked good.

Originally Posted by BadCon

I think the stock F150 fuel pump actually flows more fuel, but I could be wrong. I think this is why the Roush stage 2 Mustang supercharger kit comes with a fuel pump voltage booster while the stage 2 F150 kit does not. But again, the specific outputs of each stage 2 kit are different by about 60hp or 70hp as advertised by Roush, so perhaps that is the only difference that requires more fuel pump voltage.

Originally Posted by isthatahemi

I was running a tune and a 200 shot, and there was never any discussion regarding fuel pump or injectors....Not from the vendor or tuner, and I would estimate output at around 650crank with the MGIM, CAI, Tune & resonator delete. That said, 650 Nox HP requires less fuel than with a blower or turbo.

Originally Posted by blue5.0

Was this on e85??

Originally Posted by rredd14

The injectors do not have to be replaced on the 18 Mustang GT to run E85. Just need a tune.