OS1.40 Pipe > Couplers

[Gray E Fowler]

There are two problems using teflon. The first is that it is not very 
elastic, nor flexable. If you try to muscle this type onto a CF inlet tube 
you risk breaking the inlet tube. Second is that teflon cold flows. This 
means that a tight fit will become a loose fit....at room temperature over 
time. Exhaust temps make this happen faster. The 4stroke versions of this 
that I have seen were metal to metal and a spring loaded clamp on the 
teflon to compensate for the cold flow problem. 
I know that everyone will now say heat the teflon to get it on the inlet, 
but that is "cold flowing " the material. Gotta have a spring clamp to 
make it seal good. 



Gray Fowler
Principal Chemical Engineer
Composites Engineering
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