C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Another heat wrap question

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Old Nov 20, 2004 | 12:01 AM
  #1  
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Default Another heat wrap question

For those that have used heat wrap on their headers, or other pieces of their exhaust; How did you get it on tight, so that it won't come loose?
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Old Nov 20, 2004 | 02:58 PM
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I’m looking at using these ties, http://store.summitracing.com PN DEI-010201 but I to would like more info on the install. So who has wrapped there headers?

Last edited by Mr Mojo; Nov 20, 2004 at 05:55 PM. Reason: sig pic too large
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Old Nov 20, 2004 | 03:02 PM
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i had used heat wrap on a mustang i had total waste of money ruined my headers. too much heat build up in the headers.
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Old Nov 20, 2004 | 03:06 PM
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Originally Posted by 6spd
too much heat build up in the headers.
This is the reason I'm thinking about wrapping, I'm having trouble with o2 transitions at idle. Yes I do have heated o2's. See thread http://forums.corvetteforum.com/showthread.php?t=952331 .
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Old Nov 20, 2004 | 03:11 PM
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i don't think header wrap will fix your problem. do you have a scanner??
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Old Nov 20, 2004 | 03:19 PM
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Originally Posted by 6spd
do you have a scanner??
Yes, I use EASE. The o2's work well at part throttle and when the EGR is on, so I belive it's a temp. thing.
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Old Nov 20, 2004 | 03:25 PM
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could be ecm related i'm not a pro at this see if someone else will answer. i still think no to header wrap and it will not help if it does your problem is not really fixed.
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Old Nov 20, 2004 | 05:50 PM
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Originally Posted by C4Crazy787
Yes, I use EASE. The o2's work well at part throttle and when the EGR is on, so I belive it's a temp. thing.
Two comments as food for thought.
1.) Most header companies will void any warranty on headers that have been wrapped.
2.) The purpose of the EGR is to LOWER combustion temps to reduce the NOX emissions.

RACE ON!!!
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Old Nov 20, 2004 | 06:15 PM
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Originally Posted by CFI-EFI
Two comments as food for thought.
1.) Most header companies will void any warranty on headers that have been wrapped.
2.) The purpose of the EGR is to LOWER combustion temps to reduce the NOX emissions.

RACE ON!!!
Thanks for tip number 1) but on number 2) I was told
quote: "When the EGR opens up, it recirculates the exhaust and caused the exhaust temps to increase."

BTW I did not intend to highjack this thread... Sorry Mikey.
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Old Nov 20, 2004 | 06:33 PM
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Originally Posted by C4Crazy787
Thanks for tip number 1) but on number 2) I was told
quote: "When the EGR opens up, it recirculates the exhaust and caused the exhaust temps to increase."

BTW I did not intend to highjack this thread... Sorry Mikey.
The exhaust gasses fed back into the intake manifold, by the EGR valve, displaces some of the volume that would normally be occupied by fresh, power producing, heat producing, air fuel mixture. The PURPOSE of the EGR valve is to REDUCE combustion temperatures. Don't let anyone blow smoke up your skirt. Get your factory manual out, and check it for yourself.

RACE ON!!!
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Old Nov 20, 2004 | 06:58 PM
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Originally Posted by CFI-EFI
The exhaust gasses fed back into the intake manifold, by the EGR valve, displaces some of the volume that would normally be occupied by fresh, power producing, heat producing, air fuel mixture. The PURPOSE of the EGR valve is to REDUCE combustion temperatures. Don't let anyone blow smoke up your skirt. Get your factory manual out, and check it for yourself.

RACE ON!!!

nox(oxide of nitrogen) is made with heat and pressure, in order to reduce this gas they created EGR which operates as CFI-EFI stated.
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Old Nov 20, 2004 | 07:18 PM
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Originally Posted by CFI-EFI
The exhaust gasses fed back into the intake manifold, by the EGR valve, displaces some of the volume that would normally be occupied by fresh, power producing, heat producing, air fuel mixture. The PURPOSE of the EGR valve is to REDUCE combustion temperatures. Don't let anyone blow smoke up your skirt. Get your factory manual out, and check it for yourself.

RACE ON!!!
Ok, any ideas why my o2 transitions are sooo much better when the EGR valve is opened, could it be the extra gasses lean out the mixture??
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Old Nov 20, 2004 | 08:08 PM
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Originally Posted by C4Crazy787
Ok, any ideas why my o2 transitions are sooo much better when the EGR valve is opened, could it be the extra gasses lean out the mixture??
The reason exhaust gasses are added to the intake mixture, is that for all practical purposes, they are inert. For the most part, there is no oxygen and no fuel. Therefore the the A/F ratio of the fresh intake gasses is maintained through out the new, homogeneous mixture. It is not leaner and not richer, just less of it. It is simply diluted with the inert exhaust gasses.

My guess is, that the opening of your EGR valve and the O2 "transitions", are coincidental. *I* have never heard of a heated O2 that couldn't maintain temps sufficient to keep it at or above "light off".

RACE ON!!!
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