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

Egr???

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Old Feb 7, 2007 | 10:37 PM
  #1  
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Default Egr???

tell me about what it is...

what are the benefits of removing it on a new intake manifold? if it matters, its a L83
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Old Feb 7, 2007 | 11:45 PM
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From: columbia mo
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My suggestions are, if oyu dont have to take it off, dont take it off (e.g. converted lt1 or headers without the egr lines). I have read that it doesnt really add any power and will more than likely mess up the very touchy computer. So I would leave it unless you do something that requires to get rid of it.
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Old Feb 8, 2007 | 01:48 AM
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i have some pros/cons on my website, but i dont deal with the L83 directly
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Old Feb 8, 2007 | 11:01 AM
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Your EGR (and the one on the Iron-headed L98), is unique in that it pulls the exhaust gas internally, and doesn't have a tube coming from the headers. I believe most guys eliminate their EGR system, when they buy headers. You don't have that problem. Besides, a properly-working EGR system is off at WOT (so I can't believe it effects performance).

Working properly it lowers combustion chambers.
When it fails, it can cause all kinds of fun driveability problems (such as your car not being able to hold an idle).

EDIT: I was referring to the '85's iron heads, I should have specified

Last edited by mikey whipreck; Feb 8, 2007 at 11:24 PM. Reason: Iron headed comment needed specified
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Old Feb 8, 2007 | 02:55 PM
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I have an iron headed l98 and it has a pipe from the headers. I think I remember you having a crossfire right? I would make sure to see what you have before you do anything, thats for sure.
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Old Feb 8, 2007 | 04:58 PM
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Originally Posted by Corvette for life

what are the benefits of removing it on a new intake manifold? if it matters, its a L83
The same as removing it on an old intake manifold. Nada. Zip. Nimo neitz. Nothing.
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Old Feb 8, 2007 | 05:34 PM
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Originally Posted by favrefan2k4
I have an iron headed l98 and it has a pipe from the headers. I think I remember you having a crossfire right? I would make sure to see what you have before you do anything, thats for sure.
86 has the external pipe as well as the smog heads.
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