People with Exhaust header wrap ...question.
#1
People with Exhaust header wrap ...question.
To start, lets leave the whole debate of whether I should of wrapped it or not out of this.
Now to the real question, when I fired up my car the other day, and let it idle abit (was about 4k idle just so that we're on the same page), my header wrap started smoking. I then hooked up my EGT's on ther to see what temperatures I'm at, and I was floating around 1200*F. Well below the rated 2000*F they're meant for. Also the wrap has started to turn black. Now could this be just because of my thin wall tubing headers (SDJ), or is that just normal for the first few fire up?
Now to the real question, when I fired up my car the other day, and let it idle abit (was about 4k idle just so that we're on the same page), my header wrap started smoking. I then hooked up my EGT's on ther to see what temperatures I'm at, and I was floating around 1200*F. Well below the rated 2000*F they're meant for. Also the wrap has started to turn black. Now could this be just because of my thin wall tubing headers (SDJ), or is that just normal for the first few fire up?
#2
djessence
Ive always found with header wrap it will "burn" for the first few runs (2nd gen, and karts). Stink horribly and smoke a dcecent amount. Ive never had it turn black, maybe a pic?
Ive heard that it is just kinda 'curing' kinda deal right. Thats been my experience but ive never had mine turn black. Get a bit darker but not burnt.
Ive heard that it is just kinda 'curing' kinda deal right. Thats been my experience but ive never had mine turn black. Get a bit darker but not burnt.
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#8
Wrkn Toyota, Rootn Wankel
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I believe that what he is implying is that since the larger magority of these header wraps are some sort of cloth-like material that it would permit water seepage and thus cause rust to happen in a sealed enviroment. Which, following the logic would say that it promotes faster header death...
I have had few guys use some good quality header wrap without any issues, burning or heatwise... and I could touch his headers after he just turned the engine off.
I have had few guys use some good quality header wrap without any issues, burning or heatwise... and I could touch his headers after he just turned the engine off.
#9
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header wrap smokes and stinks for the first few startups, especially if you put it in water the get it on the header
#10
premix, for f's sake
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the main reason why a lot of people say not to use wrap is because it holds the heat into the header. the higher temps in the metal lead to faster metal fatigue and oxidation (rust) and may eventually lead to burning through the header. I personally dont care, which is why i wraped my headers (lower underhood temp plus i like how it looks). and yes, for a little while the header wrap will change color and smoke as random impurities burn away, but it will stop eventually, so no worries there...although i havent ever seen it turn black
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really wrapping it, is going to make the header last 20years instead of 100
#18
djessence
Curious.. people are saying header wrap keeps the heat in the header (which is its purpose) and can ruin it. How is the ceramic coating any different. Or is it just because the ceramic coating doesnt get wet and rust the header?
#20
I've wrapped RB headers without any problems. Since they use such thick wall piping, it seems like it won't rust through. I wouldn't wrap pacesetter type or even stainless. I'd probably coat stainless.
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