The ECM can more than compensate for additional airflow - if any. You won't get the max performance benefit without a tune but it certainly isn't going to hurt the engine.

 

5.0 here, and I installed things separately to get a gauge on what was going to happen with each one....and my brother wanted to know if anything helped so he could do it on his. Can't monitor power, never dyno'd it, but below are MPG changes.

1 - S&B CAI - No difference
2 - Flowmaster Super 44 muffler with dual out & Resonator Delete - No difference
3 - Front air-dam removal - No difference
4 - 2" leveling kit & tire install - Lost 15-20% fuel economy

Nothing seems to add except (from my experience anyway) tuners and that was soley on diesel applications. I don't believe anything that it says on the box.

 

This right here

 

You are assuming the MAF is recalibrated for the intake, which I doubt most here will do. The ECM is only as good as its inputs.

 

Yes, but the MAF doesn't need to be recalibrated in most cases and is also non-existent on the ecoboost engines. They are speed density tunes. Also, regardless of how inaccurate the MAF calibration is, the truck will still used closed loop feedback from the oxygen sensors to correct fueling. Even if the MAF is way off, the PCM will adjust fueling to keep AFR at target during CL operation.

 

Very interesting! To be honest that is the first I've heard that about the EB engines, and am impressed Ford put that kind of thought into their engine management system.

 

Not just Ford. That's the way modern EFI systems work.

 

This is the problem. You post this response and there are people who are going to believe it.

The problem is it simply did not happen. There is no way today, tomorrow, or any other day an intake, exhaust and level netted you almost 100% increase in gas mileage. 7.4 to 13.2? Aaaaa... No.

Regarding a dyno, IF you run your truck (any vehicle) on a dyno and then immediately install the CAI and test again you would be able to get a good idea whether or not you had a HP change. Keeping the existing test parameters is key.

 

Correct. Excellent fuel control is required to keep the catalytic converter operating at peak efficiency and thus reduce emissions to passable levels.

Also correct and I feel the same way about all the false info that gets posted. I probably get too wrapped up in arguing with people over stuff like this but it's frustrating to me to see it get posted and then trickle down to others.

 

Do these EcoBoost engines have wide or narrow band o2 sensors?