AIR and EGR delete?
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Joined: Nov 1998
Posts: 71,103
From: Hell was full so they sent me to NJ
You aren't going to get a lot of knock if you delete the EGR system, if that is your concern. And the AIR system has no affect on the engine, three minutes after you start it up. Its not a gut-wrenching decision to make.
My personal preference was to keep all the emissions systems intact, so I could pass NJ rolling and visual emissions. In effect, I built an 800HP nitroused LT1 that would pass rolling emissions, and had all the emissions parts functional. That was done using AS&M mid-length, single-cat emissions headers, that had the driver's side collector modified to exit on the left side of the engine, not wrap around the front of the oil pan. Once the car was no longer street driven, I pulled the EGR, EVAP, and AIR off. Doesn't make a lot of difference one way or the other. Will not affect performance, other than some minor weight savings.
My personal preference was to keep all the emissions systems intact, so I could pass NJ rolling and visual emissions. In effect, I built an 800HP nitroused LT1 that would pass rolling emissions, and had all the emissions parts functional. That was done using AS&M mid-length, single-cat emissions headers, that had the driver's side collector modified to exit on the left side of the engine, not wrap around the front of the oil pan. Once the car was no longer street driven, I pulled the EGR, EVAP, and AIR off. Doesn't make a lot of difference one way or the other. Will not affect performance, other than some minor weight savings.
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Joined: Mar 2005
Posts: 12,312
From: Aurora, IL
I went with the "emissions" headers as well, mainly for similar reasons as Injuneer. I wanted the emissions equipment intact and functional and I had an exhaust shop modify my off-road y-pipe to accept a pair of cats.
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From: Little Rock, AR
Thread Starter
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From: Central Mass and NH
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From: Orange County, CA
Its your call, Injuneer presented you with the fact of what will happen with the ORY y-pipe and on top of that, you will get additional codes if you remove the AIR and EGR. PCM tuning will get rid of the codes and you will have to have EGR blockoff plates as well, none of which is a big deal.
I would say it is not going to matter all that much. I would guess the race headers would take a little more time to install as you would have to hack out the AIR pump, AIR lines, the EGR equipment, and then install the EGR blockoff plates. In the grand scheme of things, it is not going to matter all that much.
You aren't going to get a lot of knock if you delete the EGR system, if that is your concern. And the AIR system has no affect on the engine, three minutes after you start it up. Its not a gut-wrenching decision to make.
My personal preference was to keep all the emissions systems intact, so I could pass NJ rolling and visual emissions. In effect, I built an 800HP nitroused LT1 that would pass rolling emissions, and had all the emissions parts functional. That was done using AS&M mid-length, single-cat emissions headers, that had the driver's side collector modified to exit on the left side of the engine, not wrap around the front of the oil pan. Once the car was no longer street driven, I pulled the EGR, EVAP, and AIR off. Doesn't make a lot of difference one way or the other. Will not affect performance, other than some minor weight savings.
My personal preference was to keep all the emissions systems intact, so I could pass NJ rolling and visual emissions. In effect, I built an 800HP nitroused LT1 that would pass rolling emissions, and had all the emissions parts functional. That was done using AS&M mid-length, single-cat emissions headers, that had the driver's side collector modified to exit on the left side of the engine, not wrap around the front of the oil pan. Once the car was no longer street driven, I pulled the EGR, EVAP, and AIR off. Doesn't make a lot of difference one way or the other. Will not affect performance, other than some minor weight savings.
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Joined: Mar 2005
Posts: 12,312
From: Aurora, IL
Technically, yes. However, after installing my emissions long tubes, I still got an EGR code. Apparently, the better flowing exhaust prevents the proper operation of the EGR resulting in a SES light. I ended up having to have tuning in order to allow the EGR to work with the different exhaust.
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Joined: Nov 2013
Posts: 35
From: DMV
Re: AIR and EGR delete?
what do u do about the vaccum holes on the intake after the delete? http://shbox.com/1/air_pump_recall.jpg
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Joined: Nov 1998
Posts: 71,103
From: Hell was full so they sent me to NJ
Re: AIR and EGR delete?
Put vacuum caps on the nipples on the manifold. Don't forget to cap off the 5/8" connection on your air intake, where the hose connected that supplied filtered air to the AIR pump.
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Joined: Mar 2014
Posts: 4
Re: AIR and EGR delete?
Do you have to remove the egr and pipe off back of intake or can you just plug it? I removed all other egr components and air pump and accessories. All that's left are the parts on the back of intake, but I can't get enough leverage with anything to remove these bolts, so do I have to remove or is it just for cosmetic reasons
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