Ultimate OEM+ Intake Setup (w/Video)

[rotation_nation]

I just finished installing what I believe to be the best performing and most stealth OEM+ intake system in my 2017 Fiesta ST. My goal for the build is to create what I envision Ford would have if it released a Fiesta RS.

The S200 airbox was developed in collaboration between Mountune and Ford and is proven to deliver the best performance of any cold air intake setup (other than those that use the same design, e.g. the discontinued mountune induction system). See Fordman's incredible writeup in this in this thread. Some aftermarket intakes introduce unwanted turbulence (e.g. 2JR racing intake according to Adam at Tune+) or higher intake temps. I'd also point out that the S200 is a fantastic value. At $349, it includes a brand new OEM MAF sensor, which is a $120 part. I ordered this entire setup from Whoosh, who provided fast shipping and fantastic service as always.

The setup is comprised of:

• ST200 airbox with included snorkel/cold air feed hose plumbed behind the driver side fog light (this)
• ITG panel filter (this)
• Whoosh silicone high flow induction hose in black (this)
• Whoosh crossover pipe in wrinkle black (this)

Installation was very straightforward. I highly recommend removing the cowl to install the crossover pipe. The full installation took about 2 hours going very slowly/carefully (it was my first time removing the cowl).

Initial impressions are great. I noticed modest seat-of-the-pants gains, although some of that might be attributable to the enhanced sound. I measured a 0.14 second reduction in 30-70 mph times using my racebox in nearly identical ambient temp conditions. Nothing earth shattering, but my goal for this upgrade was to prepare my car for an S280 turbo kit, which I will be installing soon.

I recorded a quick video to capture the sound. Good turbo noises, even on the stock diverter valve. The car has a stock exhaust (for now...have a Milltek non-resonated system coming in about a week). The car also has a symposer delete, which really quieted down the intake/turbo noises before installing this setup.

Overall, I highly recommend this setup for anyone seeking an intake upgrade. I don't think you can do any better from a performance/function standpoint, and it delivers in a tasteful OEM+ package.

VIDEO W/SOUND: https://youtube.com/shorts/InB_WRlMo44

 

[rotation_nation]

Update: I noticed a higher idle during my first couple of drives with this setup so reset the ECU learning. After doing that and putting some miles on the car, I can report that there is a much more substantial boost in perceived performance in the mid-high RPM range. Not super noticeable under 4k RPMs, but it feels like the car pulls much harder from 4k-5.5k, where it had originally begun tapering off. Very surprised by the results. I will perform a log and run through vdyno this week.

 

[Grsemky]

Do you track your IATs? My stock '18 box is so long it ends at just the bottom of the radiator, so I lopped off the bottom of it to feed more air. Unless I'm sitting idle I see ambient temps, idle and AC on that jumps pretty quick...

 

[rotation_nation]

Do you track your IATs? My stock '18 box is so long it ends at just the bottom of the radiator, so I lopped off the bottom of it to feed more air. Unless I'm sitting idle I see ambient temps, idle and AC on that jumps pretty quick...

i dont. I should have before doing the install. I just track charge temps, which are very good with the whoosh v3 intercooler.

I highly recommend looking at fordman’s write up, which I linked in my original post. He measured a lot of this data using a DIY ST200 Airbox.

 

[Grsemky]

I use Torque pro to monitor my stuff, the CAC is measuring after the intercooler where intake is measuring at the maf sensor on the intake. The SOAK is the difference between the two...