Little Question about EGR

[focusedrage]

i was looking at that ill as a pill cast intake manifold, dreaming about having one, and i dont want this to turn into a thread about intakes, but almost all aftermarket intakes dont have provisions for egr, and i was wondering if removing it will adversly affect emmisions. In MD, all they do is hook a wire to your ecu and have a field day, so if egr is the kinda thing that will show up foul then tell me about it.

 

[GSX4LIFE]

The EGR system is used to recirc exhaust gases into the combustion cyl, ot keep cyl temps below 2500 degrees. This decreases Knock. It is only needed when there is a reason for the engine to knock. Most people that use these these nice shiny mannis, know exactly what they are doing. And there cars are usually in a very high state of tune. I would say, if you are thinking of eliminating the EGR from your stock manni, dont. There is no proof as to if this does anything for HP. On a race car, yes, ona street car, no.

 

[autronicDSM]

I completely removed my EGR and my car now smokes like crazy at idle. If you have to pass emissions I wouldn't do anything to it.

Last time I checked knock is usually caused by air charge temp being too high so it doesn't make sense. EGR recirculates gases to reduce emissions, that's all.

 

[focusedrage]

ok, nice, yeah im leaving it on. the cast manifold that a couple of threads have talked about was tested on a stock car, and the egr was removed, good to know that it wont mess with emmisons.

 

[focusedrage]

oops i didnt read what you siad, i guess it DOES mess with emmisons. , thats a shame, i dont see why they dont make those manifolds with provisions? is it that hard?

 

[autronicDSM]

It's not hard but people who buy these manifolds usually don't need EGR anyways because their cars would probably fail emissions anyway.

 

[GSX4LIFE]

Originally posted by autronicDSM
I completely removed my EGR and my car now smokes like crazy at idle. If you have to pass emissions I wouldn't do anything to it.

Last time I checked knock is usually caused by air charge temp being too high so it doesn't make sense. EGR recirculates gases to reduce emissions, that's all.

The EGR has nothing to do with recirculating emissions. It is in place to help reduce knock. EGR stands for exhaust gas recirculation. Exhaust gasses are inert, meaning they can not reburn. Introducing an inert gas into combustion chamber will cool it down.

 

[focusedrage]

yeah i immagine by the time i get a intake, i will be failing anyway. all they do is check the ecu, so if eliminating egr flashes an engine light it might be bad. I know when i put on a manual boost controler all i had to do was plug the old soilinoid and plug it in to keep the CEL from going. I was worried about weather the absece of the egr will mess with the o2 sesors...

 

[autronicDSM]

Originally posted by GSX4LIFE




The EGR has nothing to do with recirculating emissions. It is in place to help reduce knock. EGR stands for exhaust gas recirculation. Exhaust gasses are inert, meaning they can not reburn. Introducing an inert gas into combustion chamber will cool it down.

Go on yahoo and search for exhaust gas recirculation, EGR is used to recirculate gas so less NOx is created therefore lowering emissions. You don't deserve to be "wiseman"

 

[NOSNUSE]

i don't think the EGR is controlled by the ECU, so just put a block off plate under it and reroute the vacuum lines so that they don't hook up to the EGR valve. that way it is still there in case they look, but it isn't really doing functional in any way.

 

[GrocMax]

Originally posted by GSX4LIFE
The EGR system is used to recirc exhaust gases into the combustion cyl, ot keep cyl temps below 2500 degrees. This decreases Knock. It is only needed when there is a reason for the engine to knock. Most people that use these these nice shiny mannis, know exactly what they are doing. And there cars are usually in a very high state of tune. I would say, if you are thinking of eliminating the EGR from your stock manni, dont. There is no proof as to if this does anything for HP. On a race car, yes, ona street car, no.

EGR is strictly there to reduce NOX (oxide of nitrogen) emissions, which occur at high combustion temps. Some engines don't need EGR as they didn't produce enough NOX to worry about with modern 3 way (HC, CO, NOX) catalytic converters.

Although phonetically similar, NOX and knocks are 2 very different things

 

[GSX4LIFE]

Originally posted by autronicDSM


Go on yahoo and search for exhaust gas recirculation, EGR is used to recirculate gas so less NOx is created therefore lowering emissions. You don't deserve to be "wiseman"

This is exactly what I said. It recircualtes the exhaust so less NOx is created. What do you think, it is when the engine is KNOCKING? They can happen at the same time. I dont need Yahoo search. Im an auto tech in Pa, one of the highest emissions observant states. I have emissions certifications, that I must retake every few years. Sorry, I should have clarified.

 

[focusedrage]

man FU CK emmisons, you shoudl be able to appy for an exemption because your into cars, and everyone that just uses cars for transportation should get insights... that would ballande everythign out.

 

[autronicDSM]

Originally posted by GSX4LIFE




This is exactly what I said. It recircualtes the exhaust so less NOx is created. What do you think, it is when the engine is KNOCKING? They can happen at the same time. I dont need Yahoo search. Im an auto tech in Pa, one of the highest emissions observant states. I have emissions certifications, that I must retake every few years. Sorry, I should have clarified.

HAHAHA you're dumba$$, and you just proved it by 'look at me i'm an auto tech, i know it all'

 

[InferiorWang]

exhaust gasses are not always inert. sometimes there is still a little unburnt fuel in there and recirculating it always some of that leftover fuel to be reburnt instead of going to the atmosphere and lowers emissions. (at least that was the way i learned it, I'm not going to get into a big fight with some tech that knows how everything works)

 

[focusedrage]

i have read that it is to lower temps to prevent nitrois oxides from being made, there is not enought gas re cerculated to burn the unburt feul, that is what the cat is for.