C4vettrn

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!

96GS#007

Those are not EGR tubes. They are AIR tubes....Air Injection Reaction tubes for the secondary AIR system.

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....

jimg's'93

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

C4vettrn

what all does this sysytem do?

JackDidley

Feeds air int the exhaust. Helps it pass emissions.

89onlyZ51

Pass side is AIR + EGR.

jimg's'93

Take a better look...the EGR is blocked off, only the AIR is present.

M.J.L.

96GS#007

Passenger side is AIR only.

jimg's'93

Correct. I was simply pointing out that on your intake, the EGR has been blocked off.

lt1396corvette

[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![/QUOte

I would delete out your egr and air tubes

89onlyZ51

On his, not yours. Do LT1 heads have egr passages built-in like the old iron head Gen1's?

C4vettrn

What are the pros/cons if any? What changes need done to the computer?If the air tubes put clean air in the exhaust dose the EGR put exhaust gas in the intake? Deleting the EDR would probably gain a few HP wouldn't it?

kimmer

opening a can of worms

WW7

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

89onlyZ51

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.

C4vettrn

Thats the kind of info I was looking for thanks! Oh does anyone have a passenger side tube for sale?:o Or know of someone who might?