Why remove EGR????
Originally Posted by 300bhp/ton
If you ain't got EGR - don't worry
If you have - leave it be
If you have - leave it be
I removed mine because the gm ls6 intake was cheaper than the slp version, and I also I think the headers were cheaper with out It as well. With the blower, I can live with the extra clutter for the 200+ hp 
. It's sort of like you apendix you can live with it or with out. Sorry If I'm not giving enough supporting reasons for getting rid of it. 
Last edited by conan; Aug 24, 2005 at 10:06 AM.
QUOTE:Quote:
Originally Posted by Redneck Z
I would also like to know where the mystery EGR valve is on the 01-02's.
not 100% sure but I think due to the milder cam the later cars passed emissions without. And if it ain't there its cheaper for GM to produce. The LS6 intake and few other changes helped keep the power up to ofset the cam profile.
I am aware of how they were able to do away with the egr on the 01-02's. My question was directed at Hawk#549 who said that the 01-02's use a relocated egr.
I think the main reason to get rid of the egr is because it gets in the way and is a pain in the butt. It's in the way when you change your plugs. If you want to keep your egr you have to get the SLP LS6 intake which is known to leak. Every time I remove the egr on my LS6 intake, the brass fitting gets more worn out and I worry about having a leak sooner or later. Plus the egr is just extra weight.
Originally Posted by Redneck Z
I would also like to know where the mystery EGR valve is on the 01-02's.
not 100% sure but I think due to the milder cam the later cars passed emissions without. And if it ain't there its cheaper for GM to produce. The LS6 intake and few other changes helped keep the power up to ofset the cam profile.
I am aware of how they were able to do away with the egr on the 01-02's. My question was directed at Hawk#549 who said that the 01-02's use a relocated egr.
I think the main reason to get rid of the egr is because it gets in the way and is a pain in the butt. It's in the way when you change your plugs. If you want to keep your egr you have to get the SLP LS6 intake which is known to leak. Every time I remove the egr on my LS6 intake, the brass fitting gets more worn out and I worry about having a leak sooner or later. Plus the egr is just extra weight.
I removed mine because I bought the race headers. I improved my gas mileage by 3 MPG between the headers and TD's. I also removed the AIR system at the same time. I have noticed nothing detrimental at all and the car runs better than it ever has. So in my personal experience, I would vote for removing it and making that engine bay look so much nicer. I got the power I wanted and then some, so I can't believe that it hurt me any. But then again, every car is different and reacts differently to mods.
Launching!
Joined: Mar 2004
Posts: 222
Likes: 0
From: Ontario Canada
I dont know if this makes any sense at all but I dont think that plumbing burnt exhaust gases into your fresh air intake is very good for performance at all 
Also the tube on the EGR fitting is an obstruction in the intake.
Having an 02 car means I dont have to worry about it myself
Also the tube on the EGR fitting is an obstruction in the intake.
Having an 02 car means I dont have to worry about it myself
reasons to remove egr.
1. Lightens your ride, you go faster(every little bit helps)
2. Modding motor and new parts do with out it
3. Less clutter in engine bay (car is easier to work on)
4. One less thing to break on you that you would have to fix
1. Lightens your ride, you go faster(every little bit helps)
2. Modding motor and new parts do with out it
3. Less clutter in engine bay (car is easier to work on)
4. One less thing to break on you that you would have to fix
QUOTE: Also the tube on the EGR fitting is an obstruction in the intake.
This is true, but if you decide to run egr you can do the egr mod. I've never had an egr tube protruding into my intake.
This is true, but if you decide to run egr you can do the egr mod. I've never had an egr tube protruding into my intake.
Originally Posted by Redneck Z
QUOTE: Also the tube on the EGR fitting is an obstruction in the intake.
This is true, but if you decide to run egr you can do the egr mod. I've never had an egr tube protruding into my intake.
This is true, but if you decide to run egr you can do the egr mod. I've never had an egr tube protruding into my intake.
The un-modded EGR tube directs exhaust flow in the same direction as the intake air flow. The EGR mod directs the exhaust flow ~perpendicular to the intake air flow. The EGR mod is not a good one in my book.
IMO, removing the EGR has these benifets:
Less weight
Less clutter/improved appearance
un-restricts (is that a word) the intake air flow path
reduces intake charge temps
More flow at lower temperatures will make more power.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo The egr mod does not change the direction of flow. With or without the protrusion, the tube is facing perpandicular to the intake flow. All you do is cut the tube down, not reshape it. There are minor gains to be had when performing the egr mod. If you use an SLP intake you will have to do the egr mod anyways.
I think TAQuickness was referring to the exit port in the stock egr tube. The opening on the tube is on the backside facing the back of the intake, which means the egr vents in the same direction as the fresh air flow. When you cut the tube, it is now venting down, perpendicular to air flow. Does this disrupt airflow enough to matter, I don't know. BTW, I did the egr mod to mine and didn't notice any difference.
I would also add another benefit to removing the egr system would be one less place for a vaccum leak to develope.
I would also add another benefit to removing the egr system would be one less place for a vaccum leak to develope.
Originally Posted by bshell
Does this disrupt airflow enough to matter, I don't know.
As far as the benifiet, I think the EGR mod cancels it's self out. On one hand, you have removed the restriction, On the other hand, you have different fingers... But really, on the other hand, you are now creating a lot of turbulance just behind the TB.
!egr gets rid of the protrusion and does not induce turbulance, as well as lower intake temps.
The angle of the egr is not going to be a problem. I think it was gmht that showed this to be a worthwhile mod. The powerful sucking action that pulls the air into the intake is not going to be influenced by a tiny little puff of air entering from a perpendicular angle. From what I understand the egr also shuts off once the car is warm, which is when you will be concerned about a performance benefit. I don't think the mod gets cancelled out by a slight angle change.
Keep in mind, as was already said, at WOT, EGR is shut off. So the EGR mod doesn't have any gases being pumped into the intake during WOT, and thus there is ZERO restriction. At anything less the WOT, it really doesn't matter either way. The tube is still there whether EGR is active or off though, so is still a restriction at WOT.
