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Heat wrap question?

Posted by Th3ory, Aug 12, 2019

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  1. Th3ory

    Th3ory Proven Member

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    I researched and found some dsmers have used DIE Titanium wrap on there exhaust manifolds, o2 housings and downpipes.



    My question is regarding its direct heat rating, it states that the wrap can handle 1800 degrees Fahrenheit direct contact. Does the o2 housing and downpipe get hotter then that? being that its After the turbo, that should increase the temps some over the exhaust manifold side?

    Anyone been running this stuff for a period of time on there o2 and pownpipe? I have full stainless steel parts so not worried about rust. Has anyone ever gone back to the older style fiberglass wrap that needs silicon sprayed, or is the newer Titanium wrap just a better product?

    I have no heat shields on my o2 and downpipe and would love to use some good wrap, just concerned that those parts might get hotter then the 1800 rating.
     

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  2. Boomdeeze

    Boomdeeze Proven Member

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    I wrapped my o2 and DP and feel it helped a lot with under hood temps/keeping heat away from the alt. I originally bought the cheaper stuff on Amazon but found the wrap on the o2 housing became brittle quickly and I am redoing it will some higher quality to see if it makes a difference in longevity.
     

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  3. llxkevinxll

    llxkevinxll Proven Member

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    Few things to consider.

    1. I wouldn't expect the metal exhaust components to reach 1800F externally. Egts in the 1600F range are typical but that does not mean the metal itself is 1600F. This is especially true post turbine wheel. The exhaust gasses will be cooler once past the turbo anyway so the O2 housing and downpipe should be cool enough to not have to worry about getting near the 1800F limit.

    2. There was just a discussion in another thread where a link was posted concerning the use of heat wraps instead of a ceramic coating. Take a read for yourself.

    https://www.centuryperformance.com/exhaust-header-heat-wraps-do-not-use.html

    Just a few things to think about.

    Other thread
     

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  4. chrysler kid

    chrysler kid Proven Member

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    Header wraps are known to collect moisture and rust underneath the wrap. Splash through a puddle, car wash, humidity etc and they sweat. The rust is known to eat through the metal

    Most of the builds ive seen reccomend a high temperature rust resistant coating prior to adding any wrap.

    Also to note is the quality of the part and bolts being used. I used eBay turbo bolts with a manifold heat blanket with a turbo blanket and they basically melted the cheap eBay turbo to manifold bolts. I thought they had just gotten loose, but when I removed them they actually stretched about half an inch due to the extra heat and exhaust pressure. I'm not sure how they didnt break, the threads and bolt literally melted and let the turbo droop down
     

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  5. chrysler kid

    chrysler kid Proven Member

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    Also nascar engines are basically designed to blow up once they cross the finish line. I doubt many shops would care about a set of headers a race if it meant they won the race. So 50/50 on that nascar header story
     

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  6. BLACK'98DSM

    BLACK'98DSM Proven Member

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    How long did it take for it to get brittle? And have you used the new stuff yet?

    I'm asking because I used cheap Ebay wrap, hoping this won't happen.
     

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  7. Boomdeeze

    Boomdeeze Proven Member

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    It became brittle and falling apart in under 3,000 miles but can't tell you when in those 3,000 miles it happened as I did not look at it. I have the new stuff on now but have only put a couple hundred miles on. Just keep an eye on yours and try not to touch it as that is when mine fell apart.
     
    Last edited: Sep 26, 2019

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  8. Steve92talon

    Steve92talon Proven Member

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    I used some cheap Ebay wrap and it got brittle after only a few hours. One good high speed run and my header snapped a tube in half and the pipes were glowing hot under the wrap.. I threw it in the garbage and put a ported cast manifold on with no wrap and under hood heat is less then the header wrapped or un wrapped. Coatings are the way to go. Wraps were obsolete once ceramic coating was invented. I'm only using wrap on my intake pipes now and just leave the cast exhaust as is. a bolt on heat shield would be all I would add.
     
  9. BLACK'98DSM

    BLACK'98DSM Proven Member

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    400 miles on the Ebay stuff now. Has not yet fallen apart, in fact it seems to be doing its job really well. It does feel a little crunchy if I mess with it, but I guess the trick is to not mess with it.
     

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