Water / Meth injection details

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  • URquattroGus
    S2Forum Maniac
    • Aug 2007
    • 547
    • Country: United Kingdom

    #1

    Water / Meth injection details

    What are the downsides of meth? Reduced oil life and corrosion??

    Can you run just water injection and not a water/meth mix?

    Also, presumably this is not a DIY thing to fit? Has anyone fitted theirs or paid to have a system fitted?

    Head porting sounds maybe more sensible.... Maybe betterr spool/efficiency lower down the range and more peak bhp, maybe another 30bhp clutching at a guess?
    Angus

    (1984 ur quattro)
  • DJones
    S2Forum Fiend
    • Jun 2005
    • 2020
    • Country: United Kingdom

    #2
    Originally posted by URquattroGus
    What are the downsides of meth? Reduced oil life and corrosion??

    Can you run just water injection and not a water/meth mix?

    Also, presumably this is not a DIY thing to fit? Has anyone fitted theirs or paid to have a system fitted?

    Head porting sounds maybe more sensible.... Maybe betterr spool/efficiency lower down the range and more peak bhp, maybe another 30bhp clutching at a guess?
    Water injection is very easy to fit. Mine has a .5 jet on the exit of the second intercooler, my boost controller controls it. Mine isn't mapped for it for fear of it packing up. I just have it for some top end protection above 1.1bar.

    Works a treat...

    Darren.

    Comment

    • Greg_S
      Administrator
      • Jul 2003
      • 12430
      • Country: United Kingdom

      #3
      Yeah I have it fitted to mine also, using a 0.5 or 0.6 jet triggered on boost, but not mapped in at moment. Would consider changing it to a mapped version but need a high speed solenoid valve for it too, but its mainly for some top end protection too
      Greg

      S2Forum.com Administrator & Webmaster

      '93 Coupe with a few tweeks

      Comment

      • macspring
        S2Forum Zealot
        • Mar 2005
        • 6371
        • Home: Ireland Current: Wallis & Futuna

        #4
        Originally posted by prj
        The stock IC on AAN flows well enough for about 480hp, before it starts causing serious problems, I can't imagine it being much worse on the ABY.
        Prj,

        Is the above comment correct that the little postage stamp of a stock intercooler on the side of a urS6 is sufficient until one reaches 480bhp, or have I miss understood your comment ?

        Thanks.

        Comment

        • prj
          S2Forum Zealot
          • Mar 2010
          • 6308
          • Country: Estonia

          #5
          Originally posted by URquattroGus
          What are the downsides of meth? Reduced oil life and corrosion??
          If you are very worried, just run denatured ethanol, will be just as effective as methanol.
          Can you run just water injection and not a water/meth mix?
          Yes, definitely.
          Also, presumably this is not a DIY thing to fit? Has anyone fitted theirs or paid to have a system fitted?
          This can be very much DIY, if you are even remotely handy with spanners.
          Head porting sounds maybe more sensible.... Maybe betterr spool/efficiency lower down the range and more peak bhp, maybe another 30bhp clutching at a guess?
          Don't know your map, so can't comment


          Originally posted by DJones
          Water injection is very easy to fit. Mine has a .5 jet on the exit of the second intercooler, my boost controller controls it. Mine isn't mapped for it for fear of it packing up. I just have it for some top end protection above 1.1bar.

          Works a treat...

          Darren.
          I use the Aquamist HFS-3 system, which has an actual flow sensor inside the meth line.
          So if anything packs up, that flow sensor sends a signal to the ECU and BEFORE the charge without meth hits the cylinders, the ECU switched boost, fuel and ignition maps to meth-free operation.
          So it is 100% safe.

          Also, I run dual 1.0mm

          Originally posted by macspring
          Prj,

          Is the above comment correct that the little postage stamp of a stock intercooler on the side of a urS6 is sufficient until one reaches 480bhp, or have I miss understood your comment ?

          Thanks.
          Flow wise, yes. And the cooling does not matter if you run meth injection, since that is more efficient than if your entire car was made of intercooler.
          http://tuner.ee - http://www.facebook.com/tuner.ee

          Comment

          • 20Vcqdriver
            S2Forum Maniac
            • Jun 2007
            • 829
            • Country: United Kingdom

            #6
            I did an article for Audi driver on fitting water inj. Can e-mail to anyone interested
            1986 Coupe q - 2281cc 3B, chargecooler, 2.75" exh & downpipe, ported head, water injection, CGR box, modified MD357 turbo, 440cc injectors, high power coil.
            2004 A4 2.5TDi convertible, re-mapped to 180bhp
            2011 A5 sportback 3TDi-Backbox delete, remap

            Comment

            • Jamo
              Retired OG Mod
              • Mar 2004
              • 21750
              • Country: United Kingdom

              #7
              Originally posted by 20Vcqdriver
              I did an article for Audi driver on fitting water inj. Can e-mail to anyone interested
              Would be good, you should be able to attach virtualy anything to the forum, and I think this information and line of talk needs it's own thread not in this gentlemans project thread

              Comment

              • 20Vcqdriver
                S2Forum Maniac
                • Jun 2007
                • 829
                • Country: United Kingdom

                #8
                Originally posted by Jamo
                Would be good, you should be able to attach virtualy anything to the forum, and I think this information and line of talk needs it's own thread not in this gentlemans project thread
                Tried uploading the PDF but as previous attempts in the past, comes back as upload failed, so back to anyone interested, PM me an e-mail address for article.
                1986 Coupe q - 2281cc 3B, chargecooler, 2.75" exh & downpipe, ported head, water injection, CGR box, modified MD357 turbo, 440cc injectors, high power coil.
                2004 A4 2.5TDi convertible, re-mapped to 180bhp
                2011 A5 sportback 3TDi-Backbox delete, remap

                Comment

                • Jamo
                  Retired OG Mod
                  • Mar 2004
                  • 21750
                  • Country: United Kingdom

                  #9
                  Here is the pdf on the water injection system.

                  big thanks to Sonic for realtime upload support
                  Attached Files
                  Last edited by Jamo; 4 April 2012, 14:24.

                  Comment

                  • Jamo
                    Retired OG Mod
                    • Mar 2004
                    • 21750
                    • Country: United Kingdom

                    #10
                    I've been looking at AEM water injection as I like their failsafe http://www.aemelectronics.com/water-...afe-device-69/

                    Although that can be integrated in any water injection kit

                    Comment

                    • 20Vcqdriver
                      S2Forum Maniac
                      • Jun 2007
                      • 829
                      • Country: United Kingdom

                      #11
                      Originally posted by Jamo
                      Here is the pdf on the water injection system.

                      big thanks to Sonic for realtime upload support
                      Thanks for getting PDF up , Mine has had a slight change this SORN as the units 'fault' O/P also triggers the standard map....
                      1986 Coupe q - 2281cc 3B, chargecooler, 2.75" exh & downpipe, ported head, water injection, CGR box, modified MD357 turbo, 440cc injectors, high power coil.
                      2004 A4 2.5TDi convertible, re-mapped to 180bhp
                      2011 A5 sportback 3TDi-Backbox delete, remap

                      Comment

                      • Greg_S
                        Administrator
                        • Jul 2003
                        • 12430
                        • Country: United Kingdom

                        #12
                        can you still purcahse the FiA2 and the HighSpeed solenoid valves from aquamist?
                        Greg

                        S2Forum.com Administrator & Webmaster

                        '93 Coupe with a few tweeks

                        Comment

                        • Greg_S
                          Administrator
                          • Jul 2003
                          • 12430
                          • Country: United Kingdom

                          #13
                          Been having a bit of a think about this the last couple of days, when I get a few other bits sorted on mine I was toying with the idea of building my own PWM amplifier off one of the injectors to drive another injector that I can use to drive the water injection in conjunction with other pressure sensors.

                          Do you reckon a standard fuel injector would be ok to use with water alone?
                          Greg

                          S2Forum.com Administrator & Webmaster

                          '93 Coupe with a few tweeks

                          Comment

                          • 20Vcqdriver
                            S2Forum Maniac
                            • Jun 2007
                            • 829
                            • Country: United Kingdom

                            #14
                            Originally posted by Greg_S
                            Been having a bit of a think about this the last couple of days, when I get a few other bits sorted on mine I was toying with the idea of building my own PWM amplifier off one of the injectors to drive another injector that I can use to drive the water injection in conjunction with other pressure sensors.

                            Do you reckon a standard fuel injector would be ok to use with water alone?
                            Depends if injector seals etc are compatable with Methanol.
                            Most Aquamist stuff is still available, I use JBS below:
                            1986 Coupe q - 2281cc 3B, chargecooler, 2.75" exh & downpipe, ported head, water injection, CGR box, modified MD357 turbo, 440cc injectors, high power coil.
                            2004 A4 2.5TDi convertible, re-mapped to 180bhp
                            2011 A5 sportback 3TDi-Backbox delete, remap

                            Comment

                            • Thuppu
                              S2Forum Freak
                              • Sep 2010
                              • 4115
                              • Country: Finland

                              #15
                              Quite good forum with lot's of infoa about water/meth injection, at least about Aquamist systems. http://www.aquamist.co.uk/vbulletin/index.php

                              Audi UrS4 Avant 2.5 20vt - twincharged - Project
                              Audi 80q B4 Sedan 2.2 20vt - Daily user
                              BMW 320d Touring e91 M-Sport - Daily user
                              BMW 740iA e38 - Project

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