airbox modding 2.8 V6

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  • quattrostyle
    S2Forum Zealot
    • Oct 2006
    • 6229
    • Country: Netherlands

    #16
    well test fitted the 3'' port yesterday and difference is minimal. I guess you won't get any noise from it untill you chop the whole front of the airbox

    A friend has a cone filter on his V6 30V and it sounds lovely but killed his MAF almost immediately.

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    • VAP
      S2Forum Buff
      • Oct 2009
      • 26
      • Country: United States

      #17
      Here's a few ideas to whet yer whistle...

      6" OD Airbox velocity stack inlet with 4" ID installed in OEM 2.8/12V airbox. 4" OD X 3" ID velocity stack airbox outlet to smooth and increase volume/velocity of air colum across MAF sensor wires.

      Additionally the intake tract is 3" ID from airbox to bored/CNC'd MAF housing-to-high-flow recovery sleeve with valve cover blowby inlets and RSXTB throttle body. Entire system bench-flowed and capable almost 1,000 CFM even tho the engine simply cannot pull that much air. But certainly negates ANY/ALL potential negative boost areas from airbox inlet-to-intake manifold which is also ported, gasket-matched and EVERY intake runner and combustion chamber CC'd to within 1 or 2 drops of water.
      Attached Files

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      • VAP
        S2Forum Buff
        • Oct 2009
        • 26
        • Country: United States

        #18
        a few other views of parts involved;
        Attached Files

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        • quattrostyle
          S2Forum Zealot
          • Oct 2006
          • 6229
          • Country: Netherlands

          #19
          I bet that sounds nice. But it's a step to far for me especially the costs involved.

          And I want to have an OEM look.

          Here's what I've done today, I didn't cut the airbox it's even still possible to fit the OEM inlet again if needed to.

          Sorry for the rubbish pics.
          Attached Files

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          • quattrostyle
            S2Forum Zealot
            • Oct 2006
            • 6229
            • Country: Netherlands

            #20
            oh and one thing a vaccuum hose popped off while working on the airbox. I didn't have time to figure out where it belongs, the exhaust fumes do smell like unburned fuel now.

            So where does it go?

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            • stuarty
              S2Forum Fanatic
              • Mar 2010
              • 64
              • Country: Scotland

              #21
              Originally posted by quattrostyle
              thx guys.

              I won't get mad with a 20 mm. drill that's not my cup of tea. I'll order a nice 3'' bass port and install it neat. Will also modify the trim behind the headlight to fit the bigger inlet.

              Ow and need someone from the UK that can help me out shipping 2 lambda probes over for my cabriolet. The ebay seller won't ship overseas.

              Did you ever get somebody to ship the lambda probes or are you still looking?

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              • quattrostyle
                S2Forum Zealot
                • Oct 2006
                • 6229
                • Country: Netherlands

                #22
                They're on the car already mate.

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