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Old 04-12-2010, 12:53 PM   #1
akplaaya
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Default Heat wrapping up and down pipe

I have an 05 wrx looking to go stage 2. just wondering if there is any benifit to heat wrapping the up and down pipe with heat tape? see some with and some with out.
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Old 04-12-2010, 01:46 PM   #2
Blue06RexWagon
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I heat wrapped my DP before installing it. The advantage is that it significantly reduces engine bay temperatures and therefore reduces heatsoak of your TMIC. I don't know how much difference it really makes in terms of power. If you already have the pieces out of the car you might as well do it.
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Old 04-12-2010, 02:13 PM   #3
Subian
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I'm going to take a stab and also say that it keeps the heat in the exhaust gasses and improves velocity?
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Old 04-12-2010, 02:16 PM   #4
WRBlueGDB-F
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If you decide to heat wrap, buy some large hose clamps to hold it in place.
They work much better than the metal zip ties.
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Old 04-12-2010, 02:23 PM   #5
Penguin_02
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i recall reading somewhere that heat wrapping parts may reduce life on the part.

http://forums.nasioc.com/forums/showthread.php?t=445812
Quote:
Originally Posted by Unabomber View Post
Downpipe FAQ

What about ceramic or other heat wrap coating? Though there are pros and cons to heat retention treatments with exhaust components, the general consensus with headers is that heat retention benefits outweigh the liabilities.
Pros:
Increased heat retention, which is beneficial for exhaust flow.
Reduces underhood temps, which decreases IC heatsoak.
Cons:
Additional expense.
Additional lead time, in the case of coatings.
Increased heat retention, which in some cases, can accelerate metal fatigue, especially at weld joints.
No proven HP increase.
If you plan on using a coating, ensure you are aware of what impact this will have on your header warranty if applicable. Coating or wrapping your header can void exhaust component warranties. If using a ceramic-type coating, ensure it's working heat range is above the known EGT. EGTs can be as high as 1400-1600 degrees in the extremes. Some normal coatings are not rated to this temperature level.

What types of ceramic or other heat wrap coating are available? The two most popular manufacturers of heat wrap are Thermo Tec and DEi. The two most popular coating manufacturers are Jet Hot and Swain Tech Coatings. Wrapping is a DIY project with a shorter life span than the professional only coating with a longer life span.

Excellent coating thread
.pdf file on coatings
Car Craft magazine's testing of Jet Hot
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Old 04-12-2010, 02:27 PM   #6
WRBlueGDB-F
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^^^That's because many aftermarket headers are prone to cracking.
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Old 04-12-2010, 03:06 PM   #7
GrimmSpeed
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Quote:
Originally Posted by WRBlueGDB-F View Post
^^^That's because many aftermarket headers are prone to cracking.
Yes and No. There are many pipes that do crack under extreme heat, very unfortunate thing. The goal is to get good welds, thick flanges, thick pipes that fit great, so no extreme pressures are put on the pipes.

When wrapping these pipes many people wrap over flex sections and this is a big no no. Retaining that much heat in a flex section can create problems for sure. If you are that worried about it you could always go the route of ceramic coatings.

Will
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Old 04-12-2010, 04:28 PM   #8
akplaaya
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so i take it then heat wrapping is somewhat good to do on a dp and up then. there isnt like a tape type wrap or just have to use hose clamps on each end?
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