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Old 08-26-2014, 04:54 PM   #1
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Wrapping flex headers

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Hi Folks:

I have an MTW flex header setup which is lasting quite well, from all the other failures I see with some other header types. I'd like to keep that going!

Big question: WHY do we wrap the flex section with teflon tape? I assume vibration absorption and some level of mechanical support if a crack develops.

BUT my teflon tape wraps simply disintegrate after a few hours of running. This latest one lasted about 6 hours. It was a full roll of PTFE pipe tape from CTC, and it stayed on just fine...it simply burned away slowly.

How long should the wraps last? Is there a better material? I have tried an over-wrap of Fusion tape as well, and while it certainly does create a great leathery support once it's heat cycled, this wrap too is failing fairly quickly.

I'm sure heat is the culprit. But is there really any solution to the short life?
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Old 08-26-2014, 06:23 PM   #2
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Re: Wrapping flex headers

I'm not sure but the ctc stuff is crap try masters pink
In industry that cheapy stuff sucks
Honestly I would like to know why it's wrapped?
if I could save time in a bottle
Ed like shiny
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Old 08-26-2014, 07:16 PM   #3
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Re: Wrapping flex headers

Especially if running smoke or when the engine is rich the flex will leak a bit. I usually wrap it for the break-in sequence until I have it leaned out. I then don't re-wrap it after that unless it still leaks oil...I've seen some leak forever regardless of how broken in/leaned out they are - guess I've just been lucky so far so I don't bother re-wrapping.

If I run smoke I first work in some Honda-Bond 4 (also called "The Right Stuff", sold at CTC) by hand into the flex and then wrap with tin foil and then wrap with Teflon... Learned this trick from Wingburner a while ago and it works awesome!!

I agree with Ed.. The white Teflon plumbers tape from CTC sucks. The pink or yellowish stuff is waay better. I get it from a Home Depot in the Gas Fitting section.

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Old 08-27-2014, 04:37 PM   #4
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Re: Wrapping flex headers

A-Ha! Many thanks guys.
I knew something wasn't right.

I'll go get the real stuff.
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