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11-07-2008, 06:30 PM
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#26
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14 Second Club
Join Date: Jan 2005
Location: Fair Lawn
Posts: 2,077
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So when I put my LTs on and left the EGR there with the tubing just chillen in the atmoshpere, what is that doing then? The tube on the drivers side i hear sucking air in, not sure bout the pass. side. 93 LT1 car.
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2011 Camaro
2012 JKU with Pink wheels
2015 Hellcat 6spd
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11-07-2008, 06:44 PM
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#27
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12 Second Club
Join Date: Sep 2004
Location: Vineland
Posts: 928
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Exhaust gas is inert and doesn't burn like air/fuel. EGR comes on at cruise and puts a layer of inert gas in the cylinder which in turn allows less room for air/fuel mix which means a smaller flame which in turn lowers combustion chamber temps and NOx emissions. This is pretty much the reason it only comes on at cruise, and will stall a car if it opens at idle. This is how I understood it in school. It offers no performance benefit with it there or not there so long as it is functioning properly.
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87 iroc with the usual go fast stuff
heavier than your half ton.
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11-07-2008, 07:34 PM
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#28
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Mr Fantastic
Join Date: Aug 2004
Location: West Milford NJ
Posts: 7,917
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performance = no gain really
basically just a less cluttered engine bay/weight reduction...i removed it on my mustang because it was stuck
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Matt
B18B1 FTW
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11-07-2008, 07:54 PM
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#29
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12 Second Club
Join Date: Nov 2004
Location: Haddon Twp NJ
Posts: 2,213
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Quote:
How EGR systems work The EGR valve recirculates exhaust into the intake stream.
Exhaust gases have already combusted, so they do not burn again when they are recirculated.
These gases displace some of the normal intake charge. This chemically slows and cools
the combustion process by several hundred degrees, thus reducing NOx formation.
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Found them on wikipedia proving my point that it lowers combustion tempetures. Once i find my advance systems book i can prove more with theory. Sounds like it makes no sense but its proven. Its a chemical reaction that occurs. Basicly thats Fast92RS put. Its hard to explain the science behind it.
Last edited by 69BirdX; 11-07-2008 at 07:56 PM.
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11-07-2008, 08:55 PM
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#30
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Admin.
Join Date: Aug 2005
Location: Hamilton, NJ
Posts: 20,149
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Yet another mod myth, like taking out a cat on a relatively stock car.
No perf gain, harder to pass inspection. Lovely.
where can I buy a sticker?
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Vent Windows Forever!
The looser the waistband, the deeper the quicksand. Or so I have read.
Feather-light suspension, Konis just couldn't hold. I'm so glad I took a look inside your showroom doors.
Hey everybody, it's good to have you on the Baba-too-da-ba-too-ba-ba-buh-doo-ga-ga-bop-a-dop
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11-07-2008, 09:21 PM
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#31
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,896
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Ok cool, I guess that makes sense. And ditching your cat is like 50hp!
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Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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11-07-2008, 10:59 PM
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#32
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Join Date: Sep 2004
Location: forked river nj
Posts: 609
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can a car still pass with out an egr or will it automaticly fail emissions with out one ?
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11-07-2008, 11:04 PM
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#33
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Admin.
Join Date: Aug 2005
Location: Hamilton, NJ
Posts: 20,149
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Quote:
Originally Posted by zeek
can a car still pass with out an egr or will it automaticly fail emissions with out one ?
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You'll find out, lol. For cars that get tailpipe checked, usually you will fail for high nox. I've never heard of a visual failure for egr in jersey.
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Vent Windows Forever!
The looser the waistband, the deeper the quicksand. Or so I have read.
Feather-light suspension, Konis just couldn't hold. I'm so glad I took a look inside your showroom doors.
Hey everybody, it's good to have you on the Baba-too-da-ba-too-ba-ba-buh-doo-ga-ga-bop-a-dop
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11-07-2008, 11:39 PM
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#34
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Join Date: Sep 2004
Location: forked river nj
Posts: 609
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hmm wonder if there is a way to put an egr in an intake that isnt made for one just so i can get this car to pass. its gona be hard enough passing the new v8 as a v6 lol
do they even actualy do visual checks ? iv never had one done or seen them do one
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11-08-2008, 01:06 AM
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#35
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12 Second Club
Join Date: Nov 2004
Location: Haddon Twp NJ
Posts: 2,213
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last time i ran through inspection in august they made me pop the hood. The guy was looking pretty thoroughly so im guessing thats what he was looking for
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11-08-2008, 08:15 AM
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#36
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Join Date: Jun 2007
Location: Arm pit of the world... NJ
Posts: 2,673
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Quote:
Originally Posted by BonzoHansen
You'll find out, lol. For cars that get tailpipe checked, usually you will fail for high nox. I've never heard of a visual failure for egr in jersey.
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I've seen them manually push the EGR valve and stumble the engine to make sure it is hooked up and working.
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John
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11-08-2008, 08:55 AM
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#37
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,341
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Quote:
Originally Posted by Firebird67dude
So when I put my LTs on and left the EGR there with the tubing just chillen in the atmoshpere, what is that doing then? The tube on the drivers side i hear sucking air in, not sure bout the pass. side. 93 LT1 car.
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do you mean the air pump check valves? the egr is off of the back of the intake and goes to the rear of the passenger exhaust manifold.
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11-08-2008, 11:06 AM
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#38
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14 Second Club
Join Date: Jan 2005
Location: Fair Lawn
Posts: 2,077
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Quote:
Originally Posted by sweetbmxrider
do you mean the air pump check valves? the egr is off of the back of the intake and goes to the rear of the passenger exhaust manifold.
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The egr on the back of my manifold has a hard pipe going to the pass side that bolts to Number 8 cyl. header tube and on the driver's side is a rubber tube that goes to cyl. number 1 header pipe which tees to the air pump too.
Both are just chillen open cuz my LTs.
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2011 Camaro
2012 JKU with Pink wheels
2015 Hellcat 6spd
Last edited by Firebird67dude; 11-08-2008 at 11:07 AM.
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11-08-2008, 11:25 AM
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#39
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10 Second Club; Has fan club
Join Date: Dec 2005
Location: Delmont nj
Posts: 4,369
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Quote:
Originally Posted by BonzoHansen
4th gens FTL.
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4th gen LT1s that is.
4th gen LS1 cars- 98-00 located on the front of the intake, plug it and then get it tuned out. or even better- buy a LS6 intake and tune the egr code out
and if u bought a 01-02, there is no egr
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01' Z06 62k miles. Vararam, Longtubes, off road xpipe, tuned by me. Times TBA
2001 Corvette, Bolt ons , tuned 10.75@124.56 mph 1.38 60' Sold
1997 Saturn Sc1 5spd DOHC swapped
Bolt ons, decked head, stock intake cam on exhaust side, lotsa weight redux
13.22@102.32 mph 1.93 60'
12's on moda? One day
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11-08-2008, 12:17 PM
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#40
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Join Date: Jul 2004
Location: West Long Branch
Posts: 13,598
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I wonder what GM did to remove EGR on the newwer cars?
I always thought that EGR was to return a small amount of exhaust gas into the chamber to help recombust unburnt fuel, as well as lower emissions.
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2/20/2013: They Day the ****s Stopped
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11-08-2008, 01:35 PM
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#41
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Power Member
Join Date: Jul 2006
Location: Old Bridge, NJ
Posts: 2,415
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My 04 Avalanche has federal emissions and has no AIR or EGR. The Same 04 Avalanche with California Emissons has EGR and AIR. Im not sure what they did to add or delete it. Its gotta be in the programming somehow.
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11-08-2008, 02:23 PM
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#42
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Admin.
Join Date: Aug 2005
Location: Hamilton, NJ
Posts: 20,149
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My guess is a combination of electronics and engine design. They figured how to make is pass fed regs w/less parts.
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Vent Windows Forever!
The looser the waistband, the deeper the quicksand. Or so I have read.
Feather-light suspension, Konis just couldn't hold. I'm so glad I took a look inside your showroom doors.
Hey everybody, it's good to have you on the Baba-too-da-ba-too-ba-ba-buh-doo-ga-ga-bop-a-dop
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11-08-2008, 03:22 PM
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#43
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Join Date: Apr 2007
Location: Brick, NJ
Posts: 39
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Quote:
Originally Posted by zeek
can a car still pass with out an egr or will it automaticly fail emissions with out one ?
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When I still had the original 305 in my car it passed inspection as I expected because I didn't mess with any of the emissions stuff. I came to find out later when I was doing a 350 swap that the EGR passages in the intake were totally plugged with carbon buildup, so basically the EGR was not working. Based on that I am thinking its possible to still pass with no EGR - at least for gen 1 SBC cars, not sure about the newer LT and LS series motors though.
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11-08-2008, 03:29 PM
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#44
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Join Date: Aug 2005
Location: Millville & Little ferry New Jersey
Posts: 454
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That because Gm learned that in certain engine applications using camshafts with more valve overlap when the Intake and Exhaust valves are partially open at the same time can Lower Emission's.
Same Reason and situation with why the LS-1's in 2001 no longer used EGR Systems the LQ4 Vortec truck cam had more advance, less timing and the camshaft had more overlap which in turn created lower emission's.
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2002 Z/28 = Firemutt Racing 370 w/ Cam, Trick Flow heads, TPIS 90mm Intake & 90mm T.B., Vigilante 3600 t.c., Michael's Transmissions Built 4L60E.
QTP Headers, Mufflex Stainless Y-pipe, Pypes Performance Exhaust, Moser 12-bolt w/ 33 spline axles,Truetrac & 3:73's., Spohn.
Cartek Tuned...
Last edited by ins0mnia24; 11-08-2008 at 03:31 PM.
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11-08-2008, 06:28 PM
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#45
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Join Date: Aug 2004
Location: North Jersey
Posts: 3,047
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Quote:
Originally Posted by ins0mnia24
That because Gm learned that in certain engine applications using camshafts with more valve overlap when the Intake and Exhaust valves are partially open at the same time can Lower Emission's.
Same Reason and situation with why the LS-1's in 2001 no longer used EGR Systems the LQ4 Vortec truck cam had more advance, less timing and the camshaft had more overlap which in turn created lower emission's.
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Indeed. When GM got the old ZZ3 and ZZ4 certified as an emissions-legal swap in Cali, they did it without an EGR system. The cam has enough overlap to basically "self-EGR" the motor.
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Seeya,
Steve R. in North Jersey
'16 Go-Mango Dodge Charger R/T. It's so good to be back in a V8-powered, RWD car!
Former Toy - '88 Monte SS - had lots of mods...
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11-08-2008, 09:25 PM
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#46
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Join Date: Dec 2005
Location: Boston/North
Posts: 9,214
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Quote:
Originally Posted by BonzoHansen
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we need this smiley
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Quote:
Originally Posted by BonzoHansen
dumbass.
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11-12-2008, 02:45 PM
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#47
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Sliderule / Moderator
Join Date: Oct 2004
Location: Catawissa PA
Posts: 2,294
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Quote:
Originally Posted by Firebird67dude
So when I put my LTs on and left the EGR there with the tubing just chillen in the atmoshpere, what is that doing then? The tube on the drivers side i hear sucking air in, not sure bout the pass. side. 93 LT1 car.
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Quote:
Originally Posted by sweetbmxrider
do you mean the air pump check valves? the egr is off of the back of the intake and goes to the rear of the passenger exhaust manifold.
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92-93 LT1s do not have a seperate fitting in the pass. side exhaust for the EGR as the 94+ cars do. The EGR is fed via the AIR system. There is no check valve connected on the passenger side header so exhaust gasses can flow back to the port in the back of the intake, the check valve is then placed after this port.
If you hear air out of that pipe you probably have issues = vacuum or exhaust leak. you should probably delete the EGR and AIR fitting from the back on the manifold. If you leave the relay connected it should not throw a code.
http://shbox.com/1/1993_air_egr.jpg
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93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
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11-12-2008, 04:02 PM
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#48
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,341
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oh got ya! thanks for clearing that up.
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