WOW, DANGER DANGER information overload
Really, thanks for all the info. My first try with the pipe I destroyed 3 plugs. The engine was just getting hot and could not richen it up. But that was at 9.5" from the plug. After I lengthened the pipe the temps went down, plugs survived and started working on trying to get it tuned.
One thing that bothers me is at open throttle I can open the needle valve as many as 6 turns (almost out of threads) and I cannot get it to blubber. At first I thought my tank was not presurized but I did confirm this by taking the pressure line off the tank at full throttle and placeing it in a glass of water, lots of bubbles.
If I lengthen the pipe then I can richen it up but dont know if this is the correct length (12.5in).
I forgot to mention the plane is a DD look alike, delta, 3.5lbs and thin wing.
I will go over all the notes on this thread and see if I can use the info you guys gave me to get this done.
Again thanks for your info.
Keep it comming if you have anything else to add.
Larry