Teflon headers, followup

[BUDDYonRC at aol.com]

Bob
How long is your Teflon? I found that if you use a short piece between the 
header and muffler it won't last long and usually breaks at the end of the 
header. I use a piece about seven inches long and have no problems. Also another 
thing that causes failure is overheating which can be caused by several things 
such as a plugged pipe, valve adjustment, a lean run. a lean run which you 
think is to rich but is actually due to low nitro content in the fuel. On a 140-L 
leaning out using 15% notro will melt the Teflon in as few as one or two 
flight's even with the longer Teflon length except the Teflon split's long ways.
Buddy
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