Exhaust wrap on Ebay header danger?
11-03-2007, 11:18 AM
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Exhaust wrap on Ebay header danger?
I have an Ebay header (yes pos I know) ever since the heat sheild from the stock header has been removed it gets hot as hell in the engine bay which I would rather it not. My question is, should I maybe try to make some sort of custom mount with my stock exhaust sheild, or exhaust wrap it and possibly risk cracking the header from heat buildup? Thanks.
11-03-2007, 11:58 AM
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Re: Exhaust wrap on Ebay header danger? (Coolcat55)
what material is the ebay header and is it ceramic coated (being ebay, i doubt it, but you never know)? i would just try to custom mount/make a heat shield. the few hours putting a heat shield on is alot better than time and money wasted replacing a cracked header.
11-03-2007, 12:01 PM
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The Ebay header is just a stainless steel one. (Or at least that's what they sayl, lol)
I'll probably just try to custom mount the old exhaust sheild, thanks for the input.
I'll probably just try to custom mount the old exhaust sheild, thanks for the input.
11-04-2007, 09:49 AM
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Re: Exhaust wrap on Ebay header danger? (Coolcat55)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Coolcat55 »</TD></TR><TR><TD CLASS="quote">I have an Ebay header (yes pos I know) ever since the heat sheild from the stock header has been removed it gets hot as hell in the engine bay which I would rather it not. My question is, should I maybe try to make some sort of custom mount with my stock exhaust sheild, or exhaust wrap it and possibly risk cracking the header from heat buildup? Thanks.</TD></TR></TABLE>
Wrapping a stainless header is fine. If the header you buy cracks, it's not going to be due to the wrapping material causing a higher temperature at the surface of the header. Rather, it's due to poor structural design in the first place. Remember, a header must be stout enough to handle the vibrations coming from the engine in the RPM range from idle to your highest shift points. If the header design allows for any resonances in that RPM range, then serious fatigue problems will crop up due to the fact that high stresses are caused by the resonance. So each time you move through a resonance (where a natural frequency of the header is excited by an engine or other frequency) a certain amount of fatigue life is used up depending on how long it takes to move through the resonance. Since fatigue life is culmulative, each time through the resonance uses up some of this fatigue. At a certain point, the fatigue life is used up and a clearly defined fatigue crack results and this crack will contine to grow worse leading to eventual failure.
Wrapping a stainless header is fine. If the header you buy cracks, it's not going to be due to the wrapping material causing a higher temperature at the surface of the header. Rather, it's due to poor structural design in the first place. Remember, a header must be stout enough to handle the vibrations coming from the engine in the RPM range from idle to your highest shift points. If the header design allows for any resonances in that RPM range, then serious fatigue problems will crop up due to the fact that high stresses are caused by the resonance. So each time you move through a resonance (where a natural frequency of the header is excited by an engine or other frequency) a certain amount of fatigue life is used up depending on how long it takes to move through the resonance. Since fatigue life is culmulative, each time through the resonance uses up some of this fatigue. At a certain point, the fatigue life is used up and a clearly defined fatigue crack results and this crack will contine to grow worse leading to eventual failure.
06-19-2014, 08:19 PM
#7
Re: Exhaust wrap on Ebay header danger? (Coolcat55)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Coolcat55 »</TD></TR><TR><TD CLASS="quote">I have an Ebay header (yes pos I know) ever since the heat sheild from the stock header has been removed it gets hot as hell in the engine bay which I would rather it not. My question is, should I maybe try to make some sort of custom mount with my stock exhaust sheild, or exhaust wrap it and possibly risk cracking the header from heat buildup? Thanks.</TD></TR></TABLE>
Wrapping a stainless header is fine. If the header you buy cracks, it's not going to be due to the wrapping material causing a higher temperature at the surface of the header. Rather, it's due to poor structural design in the first place. Remember, a header must be stout enough to handle the vibrations coming from the engine in the RPM range from idle to your highest shift points. If the header design allows for any resonances in that RPM range, then serious fatigue problems will crop up due to the fact that high stresses are caused by the resonance. So each time you move through a resonance (where a natural frequency of the header is excited by an engine or other frequency) a certain amount of fatigue life is used up depending on how long it takes to move through the resonance. Since fatigue life is culmulative, each time through the resonance uses up some of this fatigue. At a certain point, the fatigue life is used up and a clearly defined fatigue crack results and this crack will contine to grow worse leading to eventual failure.
Wrapping a stainless header is fine. If the header you buy cracks, it's not going to be due to the wrapping material causing a higher temperature at the surface of the header. Rather, it's due to poor structural design in the first place. Remember, a header must be stout enough to handle the vibrations coming from the engine in the RPM range from idle to your highest shift points. If the header design allows for any resonances in that RPM range, then serious fatigue problems will crop up due to the fact that high stresses are caused by the resonance. So each time you move through a resonance (where a natural frequency of the header is excited by an engine or other frequency) a certain amount of fatigue life is used up depending on how long it takes to move through the resonance. Since fatigue life is culmulative, each time through the resonance uses up some of this fatigue. At a certain point, the fatigue life is used up and a clearly defined fatigue crack results and this crack will contine to grow worse leading to eventual failure.
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