Home › Forums › TaG › TAG – Leopard – Flex length tuning
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.
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
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?
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.