Keep/loose emmisions crap
Thread Starter
Burning Brakes
Joined: May 2009
Posts: 1,014
Likes: 7
From: Ft Wayne IN
Keep/loose emmisions crap
Guys, I am in the process of pulling my engine, 92 LT-1 and had a h3ll of a time removing the EGR tubes that go to the headers, I had to cut one off. this got me thinking why should I even put this stuff back on? I live in IN. and they don't test emmisions. I would like your thoughts on this PROS/CONS. I did hear I have to take a code out of the computer so it doesn't trip. I m not sure about the rest THANKS!
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,009
From: Texas
Guys, I am in the process of pulling my engine, 92 LT-1 and had a h3ll of a time removing the EGR tubes that go to the headers, I had to cut one off. this got me thinking why should I even put this stuff back on? I live in IN. and they don't test emmisions. I would like your thoughts on this PROS/CONS. I did hear I have to take a code out of the computer so it doesn't trip. I m not sure about the rest THANKS!
Other than cleaning up the engine bay a bit, you will see no gain in the way of performance, etc. Not sure why you removed them prior to pulling the engine. The engine comes out as an assembly, fully dressed....
Drifting
Joined: Nov 2005
Posts: 1,324
Likes: 5
From: Charlotte NC
If you cut one of the tubes, it's gone now. I'd buy a set of plugs and block off plates and do without it. I left the vacuum switch for the AIR pump intact so the system still 'thinks' it's all there and throws no SES or codes.
In the meantime, you can hunt down a replacement tube for the one you cut and have it for resale. JMO
In the meantime, you can hunt down a replacement tube for the one you cut and have it for resale. JMO
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Racer
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[QUOTE=C4vettrn;1572081028]Guys, I am in the process of pulling my engine, 92 LT-1 and had a h3ll of a time removing the EGR tubes that go to the headers, I had to cut one off. this got me thinking why should I even put this stuff back on? I live in IN. and they don't test emmisions. I would like your thoughts on this PROS/CONS. I did hear I have to take a code out of the computer so it doesn't trip. I m not sure about the rest THANKS
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 412
From: WV
The AIR system pumps hot air to the cat converter to get it up to temperature faster for less emissions, you don't need it if there is no state inspection but it should be eliminated from your chip. The EGR recirculates exhaust back into the combustion chambers to lower emissions but also lowers temperatures by as much as 500 degrees. Without the EGR there is a good chance that you will have engine ping that will be very hard to get rid of..I always advise keeping the EGR system intact if at all possible. There is no performance gain by eliminating the EGR system,if you do eliminate the EGR it should also be programmed out of the chip so it won't set a code....WW
Burning Brakes
Joined: Aug 2006
Posts: 1,061
Likes: 99
From: Seattle WA
The AIR system pumps hot air to the cat converter to get it up to temperature faster for less emissions, you don't need it if there is no state inspection but it should be eliminated from your chip. The EGR recirculates exhaust back into the combustion chambers to lower emissions but also lowers temperatures by as much as 500 degrees. Without the EGR there is a good chance that you will have engine ping that will be very hard to get rid of..I always advise keeping the EGR system intact if at all possible. There is no performance gain by eliminating the EGR system,if you do eliminate the EGR it should also be programmed out of the chip so it won't set a code....WW
If you delete EGR, turn it off in the chip, too. Not just to avoid the trouble code, but it will solve the pinging problem that others mention, too. While EGR is active, the computer advances timing since combustion temps are lower with the exhaust-diluted mixture. Take away the exhaust-dilution but not the timing, and that's where the pinging comes from.