Free Mods... I found one, it works...

Discussion in 'Generation 4 - Performance Upgrades' started by PhantomX, Jul 14, 2010.

  1. PhantomX

    PhantomX New Member

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    So I'm always one to tinker and squeeze everything I can out of a car, sometimes even the little things will surprise you. As with most of my cars the first thing I tinker with is the airbox, while most are adequate they are usually feeding a big engine thru the small hole possible. The SHO is no different. That measly little hole under the lip of the hood is a joke. So I removed the snorkel and pulled it off and I have to say it absolutely made a difference.

    It's a bit of a pain and requires a little modification but it comes out and the opening in the front of the airbox after the snorkel removal is about 60% larger then the opening at the end of the snorkel where its supposed to suck in cool air.

    I did some before and after runs using my iPhone and the dynolicious app. Say what you will but that app is damn accurate. I've used in many cars and it' very very close to the ET's at the track, I will say the 60' is off just a tad but the final numbers are usually almost dead on.

    Either way for the purpose of testing regardless of the number if it consistently changes in one direction or the other you at least have a guage to go by.

    So before my best 0-60 times before snorkal removal were a consistent 5.7 seconds and 1/4 mile was a best 14.0-14.1 at 100mph. With this hot, nasty humid 85+ degree weather in FL that's about right. Now, sans snorkel, consistent 5.4 0-60's and 13.80's @ 105mph in the same crappy weather. You can actually feel the difference, especially after a few days for the PCM to acclimate. I plan on adding a drop in K&N filter to see if that further helps the improvement.

    That piece is a bit of a pain to remove.
    1. There are 2 screws that bolt it to the frame, remove those
    2. Unclip the top of the airbox
    3. remove the bottom of the airbox and the snorkel as 1 piece.
    4. remove the screw holding the snorkel to the airbox
    5. Take a file (I used a dremel) and file down one of the tabs holding the snorkel to the airbox. This isn't a big deal and since the unit does bolt to the airbox it's easy to put back on and will stay in place even missing the little tab. Personally it's a bit over engineered, most cars use a rubber style connecter you can easily squeeze and remove, but oh well.
    6. replace the airbox and clip the top back on, all done. Enjoy a better breathing TT SHO for free :woo-hoo:

    To put it back on for some of the warranty worry warts is about a 5 min job, not that I think any service departmen would really care but ya never know.


    It would be cool if we could get Rick at Livernois on a slow day to test this little mod on the dyno, snorkel on, run, snorkel off, run. I would venture a guess that you would see a modest gain under the curve, power adder cars like to breath, this one is no different. Efficient air in/out = more HP...
     
    Last edited: Jul 14, 2010
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  2. SHO U UP

    SHO U UP SHO Guru

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    Welcome to the air box mod world bro. That stock set up can be a pain to remove and modify but it's possible. When I removed my stock air box last year and made my own air intake it made a big difference sounds wise, but really couldn't feel a "power" difference. Maybe now that I have some miles on 'er, it probably is a few tenths quicker than stock. :nut:
     
  3. Sho Amo

    Sho Amo SmkTyresntDrugs

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    Wish I could get a TT sho for free...
     
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  4. IM Buddy8

    IM Buddy8 Active Member

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    Yeah I can't find the link to sign up.. :type:
     
  5. Unknown_Driver

    Unknown_Driver V6TwinTurboAWD

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    confirmed mod

    my buttox dyno approves this mod

    you will need a 5/16 wrench to remove the three screws
    a flat head screw driver to disconnect the top portion of the airbox from the intake hose
    and something to cut or file away a plastic tab


    its pretty easy

    disconnect the MAF sensor cable then unclip the airfilter box clips and lift it off and push the box to the side, remove the 2 bolt screws on top of the snorkel be sure not to lose any washers, and lift the bottom portion and the snorkel out... unscrew the last screw which secures the snorkel and the bottom box together... take a dremel or sharp blade and start going at one of the tabs to delete it once removed clean up the shavings or whatever plastic from the tab that was once there... take the snorkel and place on your desk and use as a fancy paperweight or in the cabinet next to the fine china... replace all the screws in their original positions so you don't lose them reinstall the box, filter, cable, whatever. remove the tools and drive down that closed course with a professional driver and enjoy the sound of the turbo spooling


    i have the K&N air filter and the spooling noise is very noticeable now
     
  6. FastAndFurious

    FastAndFurious SHO Member

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    Nice found!
     
    Last edited: Jul 15, 2010
  7. SHOTT6

    SHOTT6 From the D

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    Need PICs. Any pics of this free mod?
     
  8. hawkeye18

    hawkeye18 Sorta cares

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    Hahaha, it appears the Gen 4 is more closely related to the Gen 1/2 than it seems! First mod: Remove snorkel.
     
  9. PhantomX

    PhantomX New Member

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    Lol yup.

    I'll try and post some pictures when I get back home. Out of town at the present an the SHO is sitting quietly at the airport.
     
  10. EcoBrick Bob

    EcoBrick Bob SHO Member

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    You really don't have to file off the two tabs. One is much smaller and a flat screwdriver can be used to pop it out.

    I did all this today and took a 20 mi trip. Only thing I noticed was IAT temps don't come down very fast, and averaged about 10 deg. over outside temp.

    EB Flex box and snorkle appear to be the same.
     
  11. wchain

    wchain Ecoboost

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    Two bolts

    [​IMG]

    Two Bolts removed
    [​IMG]

    Remove the lower airbox, now remove the third bolt.
    [​IMG]

    I buggered the lip a little bit getting the snorkel out.
    [​IMG]

    Slap it all back together.
    [​IMG]
     
  12. armyintel

    armyintel New Member

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    I did this mod.....took no time + installed the drop in K&N today as well. It is louder and I can feel the car going a bit faster.
     
  13. PhantomX

    PhantomX New Member

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    Yup that's a much bigger hole! Gonna order the K&N here shortly...
     
  14. MilkMan

    MilkMan New Member

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    Let me preface this by saying that I don't know a whole lot about cars, so take the following with a grain of salt.

    I was in the process of doing this... and when I pulled the air box out and was looking at it I decided to put it back (it really is fairly easy to take out and put back in).

    I just don't see how this could be helping, although the hole is maybe 20-30 percent bigger at the air box than at the narrowest point on the snorkel, I don't understand how sucking hot air out of the engine compartment could be better than outside, cooler air being forced in by the snorkel. I can see right off the line ... but going 60 +... not really. I would think there would be more air going in at any decent speed.

    Seems like the better solution would be to enlarge the snorkel at the intake in some way...

    What part of the equation am I missing here? Maybe someone can explain this to me.
     
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  15. SHO U UP

    SHO U UP SHO Guru

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    ^you are correct in what you said bro. The air box itself helps to keep the hot air from getting to the filter. That little "ram air snorkel" is very small and restrictive for sure. The idea here to enlarge it or remove it makes it easier for more air to enter the filter. As long as the box is still in tact it keeps the hot air out. A true ram air from a modified hood or the like would be the best way to do it though.
     
  16. thebigjimsho

    thebigjimsho LSA = YUM

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    Ford engineers must be a bunch of challenged fools...
     
  17. thebigjimsho

    thebigjimsho LSA = YUM

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    .2-.3 seconds and 5mph difference with an air box mod is one step up from a flux capacitor mod...
     
  18. Unknown_Driver

    Unknown_Driver V6TwinTurboAWD

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    some of us want our turbos to spool up faster and don't worry i havn't installed an intercooler water sprayer yet :naughty:

    as for the hot air i think i've noticed some heat soak in heavy stop and go traffic but normal highway/country roads and cruising didn't make a difference
     
  19. MilkMan

    MilkMan New Member

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    Thanks for the explanation SHO U UP, makes sense I guess.

    Does make you wonder, they had to have a reason for putting it on there other than it removing a bit of noise... right?


    Mirek
     
  20. EcoBrick Bob

    EcoBrick Bob SHO Member

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    I tried it for a day... I agree with your conclusions..... Biggest issues is heat soak in hot summer temps in stop and go driving.

    Made me think it was time to be creative.... so I made a custom CAI with parts from other CAI's and an AEM non-oiled filter and have definitely eliminated most of the heat soak issues.

    My IAT temps stay lower, and recover much quicker. At HWY speeds, the IAT temps are the same as ambient outside temp. CAI Post with PIX- is in this Forum.
     

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