LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

EGR valve

Old Mar 30, 2003 | 01:34 PM
  #1  
eagleknight97's Avatar
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EGR valve

What is the significance of removing the EGR valve and the Air Pump system. I have read in many posts on this board and on others that many people have removed these things mainly for looks but I was wondering if there were any harmful side effects of removing these things. Thanks alot in advance.
Old Mar 30, 2003 | 02:45 PM
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n2ceptor's Avatar
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Its for the emissions....removing just pollutes the air we breath more... They do not hurt HP, because it deactivates at WOT..
Old Mar 30, 2003 | 03:13 PM
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Blocking EGR keeps hot exhaust gasses out of the intake manifold ad therefore it runs cooler and helps keep it a lot cleaner. The EGR and AIR clutter the engine bay and make an already cluttered engine bay a lot worse. Most say removing those 2 components helps a lot and opens up a good amount of space. Mine are gone when I get my LTs. No side effects at all that hurt performance.
Old Mar 30, 2003 | 03:14 PM
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Pick yourself up some block plates and seal that bad boy up.
Old Mar 30, 2003 | 03:22 PM
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When it comes time for emission testing, (if you have them) you might find yourself putting the EGR back on, unless you have a cam with overlap in it.
Old Mar 30, 2003 | 03:26 PM
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can someone tell me what all needs to be blocked off and where does the metal pipe that carrys the gases connect too- it felt like into the back of the passenger manifold?
Old Mar 30, 2003 | 04:34 PM
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Re: EGR valve

Originally posted by eagleknight97
What is the significance of removing the EGR valve and the Air Pump system. I have read in many posts on this board and on others that many people have removed these things mainly for looks but I was wondering if there were any harmful side effects of removing these things. Thanks alot in advance.
First, you'll definitely need custom programming done to avoid an SES light.

Second, what anaik said.

Third, the PCM lightens the fuel delivered during EGR duty cycle. If you have it blocked off with the stock cam, you'll likely have a lean condition during EGR duty cycle, both generating above acceptable levels of NO2, while failing emissions (which may or may not matter for you).

Regarding the AIR pump: I'd say yank it (The AIR pump) if you aren't running CATs. If you plan to keep the CATS, the AIR system will assist in heating the CATs quickly at a cold start. Pulling the AIR system could clog the CATs up over time.

As formerly stated, neither of these systems rob you of HP at WOT.

I hope this helps.
Old Apr 14, 2003 | 04:12 PM
  #8  
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Where can I pick up the EGR block off plates? What do I need to ask for?

TIA
Old Apr 14, 2003 | 04:36 PM
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I bought my plates from Steve www.mycamaroz28.homestead.com

http://web.camaross.com/forums/showt...ferrerid=24084

cheers
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