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AGU w/ Ko3S - is a FMIC compulsary before map?

Discussion in 'A3/S3 Forum (8L Chassis)' started by DaveA3, Aug 19, 2011.

  1. DaveA3
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    DaveA3 Audi A-Trizzle!

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    [Aug 19, 2011]
    Hi All,

    As above really,

    An AGU with a Ko3S - is a FMIC compulsary before map?

    I know prawn ran his without i think but is it safe and would it affect the map at all?

    Cheers
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  3. Prawn
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    Prawn My other car is a MINI!!!!

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    [Aug 19, 2011]
    I didn't run my ko3S AGU without an FMIC, it's just my AUM (and therefore ko3S) daily that doesn't have an FMIC.

    It's not essential no, but, the mapper won't be able to get the most from it when it's mapped, so you'll probably not see as much power / torque as you could do.

    I know FMIC's don't gain power as such, but they do allow for more boost to be mapped in due to lower IATs, and also, I guess more timing, as the lower temps will greatly reduce the risk of DET.

    if you fit an FMIC after the map, you won't see the full potential from the setup until the map is altered to suit.
    #2
  4. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Aug 21, 2011]
    What Prawn said.....

    FMIC's generally make top end power potential more consistent... on a mapped A3/S3/whatever running std intercoolers you may get one or two runs on the dyno that give more or less full power then they die on their arse from heatsoak that the std intercoolers struggle to recover from... on the road things are a tad better due to better airflow through the intercoolers but they still heatsoak quickly and don't recover making performance drop off pretty quickly...

    First thing I noticed after fitting the FMIC to my S3 back in the days when it was CC stage 1 on a K04 was how quick it felt more of the time.... driving back from AH Fabs down the A40 the overtaking power was just always there... previously it would do it once then feel quite lethargic afterwards... I think this is where the misconception of a FMIC giving more power comes from... it doesn't give you more power, just gives you the power you had previously more of the time...

    <tuffty/>
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  5. Prawn
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    Prawn My other car is a MINI!!!!

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    [Aug 21, 2011]
    I think it's also worth noting though, that in a custom map scenario, most tunners will not request as much boost from a car without an FMIC, simply because it's pointless due to the heat. So peak power from a custom mapped car without FMIC, is very likely to be less than one mapped with it taken into account.
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