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Titanium Exhaust Wrap, what's the real truth?
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10-09-2014, 03:51 AM | #1 |
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Titanium Exhaust Wrap, what's the real truth?
I've ordered some VRSF downpipes, and I thought that it would be easier to wrap them before installing (obviously).
I've tried searching however and there seems to be very little threads about exhaust wrap, and of the few comments that I could find people were saying the wrap is a bad idea as it creates a moisture environment that will rust the downpipes?? First, on a forum where nearly everybody gets downpipes of some sort, I can't understand why this topic seems to be so scarce? Second, I can't understand why there should be moisture causing rust on the downpipes? The heat should keep them dry and evaporate the moisture, and I don't live near snow. Any rain or wet roads shouldn't splash water up there due to the belly pan. My engine bay gets really hot at present, and I've got nothing but a JB4. Everything else is standard, so I though wrapping the new downpipes would be a good idea to help prevent even higher engine bay temperatures. Is this really a bad idea?? |
10-09-2014, 03:59 AM | #2 |
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good idea ! only issue I can see is you might restrict the clearance b/w dp's.
Moisture issue is more related to cars that see allot of water underneath, ie 4x4 etc |
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10-09-2014, 04:51 AM | #4 |
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10-09-2014, 05:01 AM | #5 |
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Downpipes may be alright but headers will likely crack as a result of wrapping any place that has salt(Ocean air/ salt on roads etc). The salt is exposed to metal via water when the water evaporates it leaves the residue which is going to lead to stress corrosion cracking. Just be aware of the problem and periodically check and clean the wrapped part.
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10-09-2014, 07:56 AM | #7 |
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Back in the day, people wrapped headers and some of them cracked or rusted out due to moisture. But keep in mind that back then a lot of cars didn't have extensive splash shields like most cars these days. Instead of a full belly pan, you had a couple of small covers in front. Headers were often exposed. So what was a problem back then may not be a problem now.
And I think all aftermarket downpipes for the N54 are stainless so rust isn't that much of an issue. Other than a little surface rust, SS isn't going to rust through. Unless they use a really low grade. Coatings are good, but I think the wrap does a better job in terms of heat transfer. |
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10-09-2014, 07:59 AM | #8 |
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10-09-2014, 08:14 AM | #9 |
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Coatings go a long way toward reducing under hood temps, but don't count on it to drop like crazy since the turbos are the main heat generators. The manifolds are double walled to reduce heat loss before the turbine, but once they hit the turbine housing, that heat just radiates. Cats that close under the engine definitely don't help the situation, so coated DPs should still net a heat reduction benefit.
If you have new parts, Jet Hot can coat them - they don't do used parts since they don't stick as well. Swain Tech coatings are good, but I've seen too many flake off on NA racecars. Swain may be more durable on parts that don't see long periods of high heat. My vote is for coating versus wrapping. Coatings go inside and out, where wrap is outside only.
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10-09-2014, 03:47 PM | #10 |
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How would someone do a proper coating on the inside of the piping? I've thermal coated the outside of my exhaust manifold, but never thought to do the inside
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10-09-2014, 04:50 PM | #13 |
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exhaust
How about that new exhaust
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10-09-2014, 06:04 PM | #15 |
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Don't really need to do it, it can cause cracking due to so much heat being held in, Id recommend JET-HOT coating, as thats what all the race cars, and fast street cars use. Cost is around $100-150 for 2 downpipes.
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10-09-2014, 06:14 PM | #16 | |
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10-09-2014, 06:48 PM | #17 | |
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exhaust, exhaust wrap, titanium wrap, titanium wrapping |
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