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  1. #1
    Reverse Gear

    Join Date
    Mar 2013

    N249 bypass on bam

    Hi people I have an 02 plate s3 with a bam engine and looking at the guide on here for doing the n249 bypass I'm a little lost as I only have one pipe running from the inlet manifold area I haven't looked to see exactly where it's coming from yet but on the guide it says there's one pipe coming from the inlet manifold one from the n112 and one from the dump valve and basically all these need to be joined with a t piece if I'm correct can someone please tell me how to do this on a bam


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  3. #2
    1st Gear

    Join Date
    May 2010
    You have a pipe going to the N249 gubbins and a pipe coming from the N249 gubbins that goes down to the inlet.

    Basically all you need to do is remove the N249 and connect a piece of silicone pipe from the top of the 'dump valve' (recirc valve!) to the inlet nipple. No T-peice needed on BAM/AMK.

    Edit, by remove i mean remove all pipes and the plastic chamber and leave the N249 connected electronically and tucked out the way..


    This image shows you what i mean by a single tube, although i'd route it differently and not in blue pipe!

  4. #3
    Alex C's Avatar
    6th Gear

    Join Date
    Jan 2010
    Lizard, Cornwall
    the N112 valve is part of the SAI system which is found on the APY engine S3. The AMK and BAM engine S3's do not have SAI which is why you only have the single pipe.

    As above, its as simple as running a pipe from the inlet manifold to the top of the DV. The rest of the bypassed pipework can be removed but leave the N249 connected electrically
    Alex S3 AMK
    Bilstein B8s, H&R Springs, Neuspeed ARBs, Genuine 18" BBS LMs & LCR Brembos

  5. #4

    Join Date
    Mar 2013
    Looking into doing this, I think that leaving the valve in the bay looks messy. I've read you can use a resistor. If I chop the plug off and solder that in place will it cause me any problems?



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