Whats the reason for the EGR delete???
Whats the reason for the EGR delete??? Ok guys everybody seems to have this EGR delete done to their cars but me. Whats the reason for it? My teacher said i probably wouldn't gain any horsepower by doing it and that my combustion chamber temps might be higher causing pre-ignition problems. So now I ask you guys whats the reason for the EGR delete?
Launching!
Joined: Oct 2010
Posts: 298
Likes: 0
visit www.shbox.com
I did it because its ulgy.(i removed the AIR too) the pipes running on the headers. LT4 does not come with it due to the cam that allready has the overlap so you wont need it. I you do a lt4 hotcam (or another cam similar or higher). you wont need it. I you do it you have to get a tune or you are going to get SES light (not on all cars).
Its up to you and what mods you have. i heard that running wothout it it could cause detonation. I have no problem so far. Its up to you. just visit shbox and read
I did it because its ulgy.(i removed the AIR too) the pipes running on the headers. LT4 does not come with it due to the cam that allready has the overlap so you wont need it. I you do a lt4 hotcam (or another cam similar or higher). you wont need it. I you do it you have to get a tune or you are going to get SES light (not on all cars).
Its up to you and what mods you have. i heard that running wothout it it could cause detonation. I have no problem so far. Its up to you. just visit shbox and read
Lot of people say it causes intake manifold oil leak because of the hot pipe runs behind the intake manifold. I mostly deleted it to make more room and clear up the space, and my long tube headers look nicer with out EGR pipe running to it 
This is the direct link to shbox site for EGR operation.
http://shbox.com/1/4th_gen_EGR.html
This is the direct link to shbox site for EGR operation.
http://shbox.com/1/4th_gen_EGR.html
TECH Enthusiast
Joined: Jun 2002
Posts: 634
Likes: 0
From: In the garage fixing LT1
Your teacher is right. On a stock cam you will get more heat and higher NOx. But with and aftermarket cam that hasoverlap there is a slight cooling effect. I only deleted mine because I didn't feel like buying a pipe to run from the headers I installed to the manifold. I also ditched the air pump to get rid of some dead weight.
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The reason it causes hotter cylinder temps on stock cams is because the fuel mixture is more pure. You have deleted carbon monoxide gas from the fuel mixture which acts as a retardant. If you desensitize the knock sensor through a tune and have a power tune done then maybe you pick something up by deleting it but hardly worth tring to measure since the power tune will make the most difference.
TECH Veteran
Joined: Dec 2008
Posts: 4,147
Likes: 62
From: Little Rock, AR
It's hidden behind the intake manifold. Most people can't even find it, lol. How removing it "cleans up the engine bay" is beyond me. Launching!
Joined: Oct 2010
Posts: 298
Likes: 0
I dont think he is only going to remove the EGR valve and the pipe, maybe he is also going to remove the AIR and the pipes on the exhaust manifold. I did all in one time, was not looking for any gains. And where i live there is no need for emision stuff in cars (the only thing the man looked under the hood is that my battery was straped)
Launching!
Joined: Oct 2010
Posts: 298
Likes: 0
no wiring?? there is a egr solenoid just in the area of the FPR is has 2 vacuum pipes (small) on it, that whats controls the egr valve. what you can do is measure the resistance at that solenoid and buy a resistor (very cheap at radioshack) and jump them. You can also remove the relay (fuse box) and see if you wont get an SES light (that if i remeber good or the relay is for the AIR kinda lazy to go look in my car now lol)
On The Tree
Joined: Oct 2010
Posts: 118
Likes: 0
I have a 95 lt1 and was told that year didnt come with the lt4?? But it has the lt4 conversion on it, so i will be fine to remove all that **** and just get a good tune???? I live out in So Cal, anyone know of a good place to go for a tune???
whoever owned it before you probably just painted the intake red
If there is no wiring that thing is not working
no wiring?? there is a egr solenoid just in the area of the FPR is has 2 vacuum pipes (small) on it, that whats controls the egr valve. what you can do is measure the resistance at that solenoid and buy a resistor (very cheap at radioshack) and jump them. You can also remove the relay (fuse box) and see if you wont get an SES light (that if i remeber good or the relay is for the AIR kinda lazy to go look in my car now lol)
no wiring?? there is a egr solenoid just in the area of the FPR is has 2 vacuum pipes (small) on it, that whats controls the egr valve. what you can do is measure the resistance at that solenoid and buy a resistor (very cheap at radioshack) and jump them. You can also remove the relay (fuse box) and see if you wont get an SES light (that if i remeber good or the relay is for the AIR kinda lazy to go look in my car now lol)
