Home Forums TaG TAG – Leopard – Flex length tuning

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    • #46560
      Samir Shah
      Participant

      Hi.

      Since I have 2 used Leopard engines, I also have used flex for the exhaust header. Both engines came with different length flex – 1 is 49mm, the other is 64mm.

      I’ve read about people ‘tuning’ with the length of the flex. Can people share their experiences?

      I’ll be running at 2 local tracks in the New York City vicinity – Englishtown, and OVRP – Oakland Valley. Both similar in length.

      I’ll appreciate any education, theory, and suggestions about what length of flex to use at these tracks.

      Thanks, Samir.

    • #46572
      TJ Koyen
      Moderator

      Short flex = more top/bottom end power
      Long flex = flattens the power curve out and lets the engine pull harder in the mid-range

      Use short flex when you’re running on a track with a long straight or tight curves and you’re revving the engine hard.

      Use a longer flex when the track is more flowing.

      In Sr. we almost always use a short flex.

      Driver/Coach/Wrench : Innovative Performance/Exprit
      Owner : Oktane Visual - www.oktanevisual.com
      www.facebook.com/oktanevisual
      www.instagram.com/oktanevisual

    • #46573
      Samir Shah
      Participant

      Thanks. I’ll have my son test both flex, and see if he can make out the difference. Since we’ll have a restricted header, it could be interesting.

      On a related note, is the silicone sleeve over the flex needed? Can I use either nothing, or header wrap? I see exhaust gas leaking from that area, will it make a difference?

      Thanks again.

    • #46625
      TJ Koyen
      Moderator

      The sleeve isn’t needed but it’ll help keep the back of your kart clean rather than covered in oil from the header.

      It won’t make any difference.

      Driver/Coach/Wrench : Innovative Performance/Exprit
      Owner : Oktane Visual - www.oktanevisual.com
      www.facebook.com/oktanevisual
      www.instagram.com/oktanevisual

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