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Downpipe heat shield question

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Old Feb 26, 2005 | 03:14 PM
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pdkloste
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From: Yakima, WA
Downpipe heat shield question

The stock downpipe on my 97 has the heat shield on it... when I finally replace it, do you guys know of any pro's or con's on wrapping or shielding the downpipe for reasons other than keeping the heat out of the cab?
 
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Old Feb 26, 2005 | 03:19 PM
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From: colorado
check out the last few postes in this thread;https://www.ford-trucks.com/forums/s...d.php?t=348232
 
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Old Feb 26, 2005 | 03:26 PM
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Looked at that earlier/which prompted my question...

I quess that I don't understand the reason for wanting to retain heat in the downpipe/turbo when EGT's are such a concern. Don't mean to be ignorant, just need the education!

On edit: I understand the reason for temp on the inlet side of the turbo to be low as possible. Why would wrapping the exhaust side decrease the lag?

Thanks
 

Last edited by pdkloste; Feb 26, 2005 at 03:33 PM.
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Old Feb 26, 2005 | 04:13 PM
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Originally Posted by pdkloste
Looked at that earlier/which prompted my question...

I quess that I don't understand the reason for wanting to retain heat in the downpipe/turbo when EGT's are such a concern. Don't mean to be ignorant, just need the education!

On edit: I understand the reason for temp on the inlet side of the turbo to be low as possible. Why would wrapping the exhaust side decrease the lag?

Thanks
the hotter air is, the less dense it is, and thus it will move more easily through the system. by keeping more heat in the exhaust system it can actually help to decrease EGTs by increasing the velocity of the gasses as they pass through the system. the less dense air also decreases back pressure allowing the the turbo to spool up faster
 
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Old Feb 26, 2005 | 04:33 PM
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Thanks!

Just proves that I'm not too old to learn... Will check into the wrap and do the downpipe when I swap it!
 
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