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One for the Diesel boys

Discussion in 'A4/S4 forum(B5 Chassis)' started by ScottD3, Feb 1, 2012.

  1. ScottD3
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    ScottD3 I want your faulty electronics Supporter

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    [Feb 1, 2012]
    Any one out there fitted a FMIC on to their diesel?
    Mainly the AFN people of us.

    I think I've spent to much time talking to the 1.8T boys and their tuning habits and it got me thinking.

    I found this on ebay.
    http://www.ebay.co.uk/itm/310334525281

    N
    ot that I would fit one to audrey but thought has crossed my mind.
    So wondering if its been done and what you lot think about the idea for a diesel.
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  3. fARQUARE
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    fARQUARE Member

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    [Feb 1, 2012]
    Im pretty sure the intercooler is not a restricting factor on the afn until you get near 200 bhp.
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  4. ScottD3
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    ScottD3 I want your faulty electronics Supporter

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    [Mar 12, 2012]
    And thats miles way, Turbo, injectors, 11/12mm fuel pump and some other bits.

    All relatively cheap for the gain you get but I wonder how a FMIC or the above would effect MPG.
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  5. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Mar 12, 2012]
    I'd disagree.

    The airflow on a diesel for a given power output is about 50% greater than a petrol due to the AFR a deisel runs at.

    At 180hp on a petrol engine, the intercooler is already pretty hopeless, it heatsoaks very quickly and you can easily see silly IAT's.

    Given a TDI will be flowing the same amount of air at ~120hp, as a petrol will at 180hp, its obvious the stock intercooler is already out of its depth on even a mildly tuned TDI.

    Now yes, unlike a petrol a derv wont suffer quite as badly with high inlet temps, but its still not a great idea, in terms of power nor longevity to be pumping in roasting hot air.

    Bear in mind that Audi themselves fitted a much larger FMIC style intercooler to the 150PD golf, meaning that at 150hp the engine wasnt being kept cool enough with the stock intercooling setup.
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