80q b4 2.2 20vt project

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

    #181
    Fitted a catalytic converter with v-bands, just to clear MOT and the emission test. Easy to change to a stright pipe if it is restricting.





    Welded on a bracket that fits the mount on the transmission, to keep the weight off the turbo and manifold.

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

      #182
      Got a genuine Tial diaphragm for the knockoff wastegate. Fits 99% PnP. Made just a few small tweaks, machined a little bit deeper grove on the valve shaft, made deeper countersinks on the body because the bolt heads hitted the diaphragm body and the valve didn't close properly. Also machined off ~0.3mm of the body inner ring that keeps the diaphregm in place, so when screwing down the cover it dosn't cut the diaphragm. There was some marks of too tight fitting on the orginal diaphragm, small cutting in the material. Assembled locking screws with soft lock, so they hopefully won't come loose again.







      Needed also to do a new seat ring as the old one was totally wrong size. It was tight when the valve pressed it down, but when it opens the ring was loose and the valve wouldn't seat properly. It was wrong size in all directions, also too small diameter. I don't understand how I didn't saw this when I fitted the wg for the first time..? Now the new ring will stay fit when the wg is mounted to the manifold.




      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

      Comment

      • s0_big
        S2Forum Maniac
        • Dec 2009
        • 685
        • Country: Sweden

        #183
        Nice

        Nice work as always! A bit jealous of your fabrication skills

        Comment

        • _ShurikeN
          S2Forum Maniac
          • Mar 2010
          • 733
          • Country: Russian Federation

          #184
          Originally posted by extreme327
          I use on my b4 in front S8 brake discs (314mm) 17 inch wheel is minimum.
          There are lots of 16" rims which would fit on these brakes well. Including many OEM wheels from 4A and 8D audis.

          Comment

          • _ShurikeN
            S2Forum Maniac
            • Mar 2010
            • 733
            • Country: Russian Federation

            #185
            Nice DP, Thomas. I've started designing mine and it comes out pretty similar at some point.
            Attached Files

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            • diesel des
              S2Forum Possessed
              • Feb 2004
              • 3896

              #186
              What material did you use for the valve seat?


              Sent from my Moto G (5) using Tapatalk

              Comment

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

                #187
                Just basic mild steel.

                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

                Comment

                • diesel des
                  S2Forum Possessed
                  • Feb 2004
                  • 3896

                  #188
                  I wonder if it will last ok in this application?

                  Sent from my Moto G (5) using Tapatalk

                  Comment

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

                    #189
                    Honestly I don't know, but I would guess it would hold for some time, especially when the ring is now pressed down tight between the wg and manifold flanges. If it doesn't hold, then I could try to make one from stainless.

                    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

                    Comment

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

                      #190



                      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

                      Comment

                      • diesel des
                        S2Forum Possessed
                        • Feb 2004
                        • 3896

                        #191
                        Nice!

                        Sent from my Moto G (5) using Tapatalk

                        Comment

                        • quattro-nick
                          S2Forum Extremist
                          • Sep 2012
                          • 1746
                          • Country: Belgium

                          #192
                          looks great thomas,mot okay now?
                          audi coupe quattro b2 2.2 20vt project (573hp-626nm)
                          TWINCHARGED power,zero lag
                          AEM W/M injection

                          Comment

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

                            #193
                            MOT:ed today without any faults, and the car is now registered as 5 cyl turbo quattro. Official power is 202hp/270Nm(dyno sheet with these figures).




                            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

                            Comment

                            • Henkjan
                              S2Forum Extremist
                              • Aug 2003
                              • 1705
                              • Country: Netherlands

                              #194


                              Originally posted by Thuppu
                              MOT:ed today without any faults, and the car is now registered as 5 cyl turbo quattro. Official power is 202hp/270Nm(dyno sheet with these figures).
                              why so modest?

                              Comment

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

                                #195
                                We used stock AAH 174hp as comparison so +20% is max leagal power figures on street.

                                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

                                Comment

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