Hello everyone

In some distant thread I read the poster was talking about how they assess the length on the tuned pipe in flight. I now cant find the info or the thread. Can anyone share their tuning tips?

I am familiar with running the engine open face and getting an RPM then successively cutting the header to get the RPM above the open face reading until it then drops off again. Most website info then tells you to go and fly it and make small changes from there. What they dont say is what I should be looking for to know if the pipe is long, short, or just right.

At full throttle should I see increase in RPM when I climb or dive, should it be completely constant? The obvious clue that the pipe is too short is sensitive needle and blown plugs.

Cheers
Tarquin

P.s. for those interested I am slowly getting stuff done on the Beetle. I now hate sanding filler/primer!