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Old 11-13-2002, 11:40 AM
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Post Header Wrap ??

I bought some new black material header wrap from Earl's. They said it was used for race cars here in Indy and would not rust out headers with condensation. I have not put it on yet!! Any suggestions or comments on use of header wrap?? I am just trying to reduce engine compartment temperature. THANKS DAVE SHANK

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Old 11-13-2002, 01:48 PM
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Dave.
Ive got a guy on another website thats testing underhood temps and He MAY use header wrap to see the diff. If he does, I'll let ya know the results. HG
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Old 11-13-2002, 02:04 PM
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The problem is not condensation but rather the decarbonization and grain structure growth that occurs to mild steel when it is heated beyond a certain temp. I have seen examples of the damage that occurs and it looks like the metal just disintegrates with multiple cracks. How long does this take? Thats an question I don't have an answer to but it does not affect stainless pipes nearly as much. Headers don't last long to begin with so if it cut their life in half I'm not sure I would want the wrap on mild steel pipes, stainless is pretty durable so I might use the wrap on them. Kinda like the blue hue of stainless headers though.
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Old 11-13-2002, 06:38 PM
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I've never had any good luck wrapping headers, I'll agree with 4-jaws comments. The only thing that worked on one of our street/strip cars was routing some aluminum clothes dryer hose from the front of the vehicle to force incomming cooler air over the steel/painted headers, of course this does not help at all when the vehicle is at idle. We usually just 'sweat it out'. If you have ceramic coated headers you will have better results when they are wrapped. At any rate,it worked for one of our cars because I replaced some old wrap ( appx. 14 months old) and the ceramic headers looked good.
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Old 11-14-2002, 05:51 AM
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Guys, if you have never used the Jet Hot tpye aluminum/ceramic (a lot of companies supply the coating now), you are missing something great. I have done several sets of headers over the years. I won't say they will last forever, but it is sure looking that way so far after nearly a decade of continuous use on the early sets. Still look as good outside and INSIDE as they did on day one!
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