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Will I have to retune after getting new Iab valves???

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    #1

    Will I have to retune after getting new Iab valves???

    I am putting on the f22a6 intake manifold runners on my a4. Because they are dual runners and the iab valves open at a different rpm will I need a tuning for them to function properly?
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    #2
    For sure. If you are changing the mix of A/F due to larger intakes or exhausts a tune is required. This is assuming you have something to tune (proper ECU). This also implies someone already made a custom tune for the old setup.

    Otherwise if it's all OEM (ECU, etc.) then no. Let the ECU sort out the A/F for open loop (driving). Idle may be a bit weird in open loop.

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      #3
      Originally posted by Raf99 View Post
      For sure. If you are changing the mix of A/F due to larger intakes or exhausts a tune is required. This is assuming you have something to tune (proper ECU). This also implies someone already made a custom tune for the old setup.

      Otherwise if it's all OEM (ECU, etc.) then no. Let the ECU sort out the A/F for open loop (driving). Idle may be a bit weird in open loop.
      So without a programmable ecu, Honda couldn't tune my ecu at all? What I wanted to do was put on a6 runners, with h23 plenum and throttle body, which is 4mm bigger, put in a6 camshaft, and a6 ecu to match. And I already have exhaust system, straight pipe. Will that new ecu work, could I tune it at all? Or would I have to get an entirely new programmable ecu?

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