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FMIC core size

PaulJC84 Mar 16, 2006

  1. PaulJC84

    PaulJC84 Owner

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    Hi guys what size of core do you think would be alright for behind the standard bumper?

    I think i could get away with quite a tall one as the bumper is quite open when you open the bonnet.
     
  2. jcb

    jcb Active Member

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    about this size.....[​IMG]
     
  3. jcb

    jcb Active Member

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    its a 45mm core IIRC - forge.
    Am about to lower it about 30mm as I am fitting an S4 bumper
     
  4. PaulJC84

    PaulJC84 Owner

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    Cool thanks very much!!

    How can you lower it? Is it adjustable?
     
  5. jcb

    jcb Active Member

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    its only held on by two angled brackets, You can see them top left and right.
    The inlet manifold side is a long pipe and that just needs swivelling round, the turbo side is about to get a nice nomex lined one peice tube that forge have just finished producing that incorporates the Recirc valve entry point.

    I am only really looking at dropping it maybe an inch or two anyway. Just puts more of the core in the direct air.

    S4 has much deeper vents
    [​IMG]
     
  6. jcb

    jcb Active Member

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    sorry its a 40mm core. and this is how snug it is behind the metal bumper bar, I believe they have to rmove about 5mm in teh centre.

    [​IMG]
     
  7. PaulJC84

    PaulJC84 Owner

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    Ok cool.

    Can you see anyother sensors or anything on the hose/steel pipes. As on some models or all models there is a boost sensor type thing. Known as a MAP sensor.
     
  8. jcb

    jcb Active Member

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    not sure what you mean, what steel pipe?
     
  9. PaulJC84

    PaulJC84 Owner

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    [ QUOTE ]
    not sure what you mean, what steel pipe?

    [/ QUOTE ]

    Yeah on the steel pipes. Not on the intercooler its self.

    Because i heard there is a sensor on them for boost.

    [​IMG]

    Its like part 7 on the standard intercooler.


    Here is a close up of the bolts and the harness, here's the one from the 2.7T motor in the S4 its just the same though. Since it has 2 intercoolers, they plumbed it into the pipe that merges the two intercooler pipes.

    [​IMG]
     
  10. That's more than likley the IAT(Intake Air Temp) Sensor. These engines do not use MAP sensors. They use a MAF instead. Cars ECUs generally use either/or to calculate fuel/air ratio. The IAT sensor is another, additional sensor used by the ECU for various other calculations...

    If you plan to fit a tall FMIC core... although it seems there is a lot of space there with the bonnet open you will have to consider the bonnet catch which actually sits in a lot of the space you see with the bonnet open. It would foul on a tall core... which is why nobody actually makes a tall core for these cars.

    *EDIT* In answer to your question about core size... 40mm seems to be the thickest you can use without cutting the bumper carrier etc... up to you of course. I think it's possible to fit 3" in there with some trimming, which in my opinion would be well worth it for the gains. Heaight x Width? Just measure it!
     
  11. PaulJC84

    PaulJC84 Owner

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    Oh right i just got MAP sensor from the US guys.

    I think it may only be on DBW cars not 100% though.
     
  12. PaulJC84

    PaulJC84 Owner

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    I have looked into the MAP sensor.

    And some 1.8T's do have them.

    Here is a flange for making custom fmic.

    http://www.42draftdesigns.com/18tmapsensors.htm

    So should be easy to make a fmic kit now!!!

    I think i am going to give it a bash in a couple of months like.

    These flanges are 25 Euros.

    I will see if my car needs one first tho.
     
  13. PaulJC84

    PaulJC84 Owner

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    I have just been and had a peek out at my standard ic and it looks like my car doesnt have one of these sensors.

    It must be DBW cars which have them.

    I will ask Jim at Star tomorrow about this if i remember.
     
  14. I know for a fact our cars don't have them, that's why I said what I did above...

    Ya got me thinking now /ubbthreads/images/graemlins/confused.gif
     
  15. PaulJC84

    PaulJC84 Owner

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    Oh right, i was not doubting you. It will be the later model A4s that have them.

    I have the same model as you i think from your sig.

    I am going to buy a core in a couple of months when i have a peek behind my bumper and take some measurements.

    Is so simple to make a kit like i dont know how these companies can charge about £1000 for a kit.
     
  16. Totally agreee... I wouldn't entertain paying the money most people charge for kits when it's possible to put one together yourself for a few hundred quid at the most. Imagination and a little technical know-how is all you need /ubbthreads/images/graemlins/smile.gif

    Good luck bud, be good to see what you come up with /ubbthreads/images/graemlins/ok.gif
     
  17. jcb

    jcb Active Member

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    no sensor on non DBW models (mine).
    This FMIC was the Forge development model for A4's, all kits are based on this format.
    The S4 bumper I am fitting will allow me to drop it down into the larger air dam and more air.
    I am potentially looking at a much thicker core and a wider I/C to replace it as time goes on. (900mmx200mmx80mm core)..like the seirra cosworth dimensions only bigger!

    Don't buy the whole tall square IC thing as most of it sits behing the bumper and out of air flow.
     
  18. PaulJC84

    PaulJC84 Owner

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    Really!?

    I could take your current core off your hands then if you wish!! /ubbthreads/images/graemlins/smile.gif
     
  19. jcb

    jcb Active Member

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    could do that if you are willing to wait a couple of months.
    I won't have the new turbo fitted for a while......
     
  20. PaulJC84

    PaulJC84 Owner

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    I am not in a hurry.

    Could just buy a few other bits and bobs in the meantime!!
     
  21. docurley

    docurley Moderator Staff Member Moderator

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