dave91gt

2014 EB.
Did it out of curiosity. So far, no real earth shattering change. I hear a bit more whistle and it just could be I feel a bit smoother acceleration.
No real point in the post other than to say I tried it. I read the gazillion thread posts on a forum and it turned into a hot mess. Can't remember the forum. But, I will run it like this for awhile. Took 5 minutes to pull them.

Tremble

Oh no, you removed the flux capacitor.

Gremlin85

Oh great, now he'll end up like this guy...

http://www.motortrend.com/news/flori...o-time-travel/

Tothemax

I removed mine for a bit. No noticeable change. I ended up putting them back in after reading the post from the guy who designed them. There is a reason they are in there and a lot smarter guys than me designed them to do things Ill never know.

Smokin Joe

Gotta link to this? I'm curious to read about their design intent.

Tothemax

I'll see if I can find it again. It was buried in a big thread

dave91gt

I read a lot of interesting information on them. The debate was noise suppression vs. airflow. I'm not smart enough to debate it so I pulled them for an unscientific test. In my uneducated opinion, any restriction in the inlet stream is not desirable. Turbos in a race car, or even in my old 7.3 diesel, are connected directly to a filter through an open inlet. The oxygen sensors adjust the AF to accommodate any minor changes.
In my unscientific test, I noticed slightly smoother acceleration and more whistle. Mpg hasn't changed. I'll run it for a bit longer.

Tothemax

Found it: https://www.f150forum.com/f70/ecoboo...4/#post4065629

Post # 392

I work for a company that produces these blow molded turbo ducts for both the 2.7L and 3.5L TT engines. We also assemble the swirl vanes as part of the sub-assembly provided to FORD (tier 1) among other welded bellow and cuffs to them. I was the production engineer that worked directly with FORD Dearborn. The swirl vanes in question are injection molded product. The ridges are used to de-mould the product out of the tool. The newer vanes lack these because of the parting line associated with de-moulding has changed.
The vanes purpose are for NVH prevention. "Noise Vibration Harmonics". That means they will quiet the air stream by creating a air pre-swirl condition to the turbo impeller. They also provide a minor increase in spool time at lower RPM ranges during initial acceleration. In addition reduce the turbulance on the incoming air (K coefficient).

Smokin Joe

Thanks! That's good to know.

sigma pi

They are for noise, sweet sweet turbo noise. I took them out and left them out.