Heat Wrapping Exhaust

[JETURBO]

Hahaha so its a Ti wrap exhaust lol

[seangt40]

Wrapping mild steel or cast iron exhaust components will cause them to crack. Dont ask how I know. Excessive heat in parts changes crystalline structure of metal. This makes them brittle. Cracks occur & moisture in pipes accellerates corrosion. Stainless or steam pipe bends are generally fine. Apply damp & wrap from rear/bottom to front/top to stop leading edge of wrap lifting in airflow. Go ceramic coating (in & out) where ever possible.

[Trent0]

Oh well that's sh!t. I have a heap of wwrap coming in but my system is mild :/ This stuff reckons it doesn't need water to wrap it. Spose it won't make a difference though.

Generally how long until it'll crack/bugger up. And don't say how long's a piece of string

[Kroozin]

Maybe try a wreckers or something for the proper heat covers..? My guess is the wrap would of cost ya less than 50bux, just because you bought it doesn't mean you cant change your mind.

[EFSIX]

  On 25/11/2012 at 6:27 PM, Trent0 said:

How much have you wrapped up? I done a bit of a search on here and it was mixed opinions. Same people claimed that heat wrapping the headers caused them to crack.

I might do a bit of DIY brackets for the shields but also do the wrapping. What kind of stuff did you use? I could imagine the glass fiber stuff being itchy, thanks for the heads up!

hey buds when I wrapped my headers I pretty much overlapped half of the wrap each way going along til I reach the ends then stainless zip tied the ends off..then repeat the process for the rest..be aware that some you may need to dummy up and then cut to size before wrapping and tying down..also the water shrinks the wrap so alway allow a little extra at the ends..ive wrapped alot of my cars and never in there whole life have they cracked for me,never!

ive bought this stuff of fleabay and have bought so many from him that I wont doubt it.cheap and depending on what car you may need a couple of rolls as ive used it on my v8's with pacies & difillipo's etc

http://www.ebay.com....=item4cffffdfc1

[Trent0]

Yea was about $50 for 10m.

Thought it might be cool to do but yea maybe not. Will come up with results in the near future

[Trent0]

Hey EFSIX, approx. how much wrap do you use in meters to do the stuff you've done?

** also, that link says it's only rated upto 550 C, is that enough?

Edited 28/11/12 06:13 PM by Trent0

[SuckSqueezeBangBlow]

I wrapped mine ages ago, no real noticeable difference in under bonnet temps but also no way of measuring

[turbotrana]

Dont do it mate. One guy here posted the correct answer. He had crystalise in his answer.

[Impellor]

Thought I should do a little investigating into the subject. Now I haven't spent hours, but the general consensous is that exhaust wrap should not be used on cast iron applications. Based on the premise, that during the casting process there are wall inconsistencies. What ocurs is the thinner areas of the casting will crack. The thinner areas become hot spots, so the heat distribution becomes uneven, causing the cast iron to crack. Stainless steel has no problems at all, as far as I can see.

Cheers

Edited 29/11/12 12:30 AM by Impellor