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post #1 of 8 Old 03-25-2016, 11:21 PM Thread Starter
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Hotside wrap, pros & cons

Getting ready to start installing the hotside and was curious about wrapping the entire thing. It's an On3 kit, mild steel. Downpipe is already wrapped. I've read that wrapping helps spooling, and lowers under hood temps, but can also trap too much heat and cause cracking in welds and warping of flanges. Any truth to either of these? Does anyone have any experience with this?

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post #2 of 8 Old 03-26-2016, 08:35 AM
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I hate wraps. Despite any potential benefits I'm not wrapping my new system we're building.
From experience with the old system the wrap acts like a sponge collecting dirt and any oil that may be leaking. Now I prefer looks over performance so I'm willing to lose 1-2hp and instead I'm looking into either having the pipes chrome plated or ceramic coated or a combination of both processes.

I don't think you want to wrap bare steel pipes. I think you still want to have them ceramic coated to protect the steel then add wrap over that. That's what my old system had and the pipes still look great.

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post #3 of 8 Old 03-26-2016, 06:44 PM
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I've fully wrapped evey kit I've messed with. Won't hesitate on the one I'm putting together now. Everything is cooler, plug wires last longer, etc.

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post #4 of 8 Old 03-26-2016, 11:29 PM
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Mine is wrapped, too. I wrapped because of heat. Not because of spool or power.


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post #5 of 8 Old 03-27-2016, 12:10 AM
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Wraps have a lot of pros, at the expense of more stress on the exhaust.

Lower underhood temps, higher turbocharger efficiency, less heat soak

People crack manifolds, and other people run top-level prototype cars through 24 hours of race conditions. People like Audi's Lemans team use fancy alloys, but more conventionally-made manifolds don't have to fail just because they're heat wrapped.

http://www.enginelabs.com/news/audi-...the-year-2013/
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post #6 of 8 Old 03-27-2016, 08:21 AM
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I always coat everything and wrap any pipe that goes near any other vital components ie into the engine bay. Zero cons to report. Was under the impression that it would need replaced every few years naturally, but I have it on setups going 5 years plus now no issue.

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post #7 of 8 Old 03-27-2016, 09:41 PM
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my only regret is not trying the silicone spray to protect the wrap.... not sure if you guys have tried it but supposedly it makes it last longer. my hot side was coated in and out which helped although not as much as wrapping it afterwards.

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post #8 of 8 Old 03-29-2016, 03:01 PM
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pros...
keeps under hood temps down (huge for a race team who has work to do between rounds)
keeps heat IN the tubes which helps with spooling

cons
its a royal pain in the ass to do
they hold in moisture

we did it a few years ago and have have had to replace a few sections over the years but nothing major

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