EGR delete

[Jeffonebuck]

"Port Holes" Does anyone have a link so I can read up on this ? I know it has been discussed on here and just want the pros and cons.


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[lji372]

Port holes FTW!!

[whitey]

Try googling egr delete marauder. Google loves you, and you should feel the same.

[RacerX]

Are you talking about just capping the tube on the headers and the back of the EGR valve or taking apart the EGR valve to fool the sensor into thinking it's working?
Pros: Emissions, help with burning NOX gasses. EGR is only used at low RPMs and idle. It is closed at WOT.
Negatives: Depending on your state, if this is turned off in your tune, (which it has to be if you don't want to throw a code) you may not pass emissions/ODBII testing.

IMHO, leave it if it's working. I went the no EGR route and went back to having it. It is closed at WOT. Period. No biggie.
Here's the EGR How to Gut pdf:

[Limited360]

No EGR on my car... Blocked and shut off in cal


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[Mr. Man]

Are you talking about just capping the tube on the headers and the back of the EGR valve or taking apart the EGR valve to fool the sensor into thinking it's working?
Pros: Emissions, help with burning NOX gasses. EGR is only used at low RPMs and idle. It is closed at WOT.
Negatives: Depending on your state, if this is turned off in your tune, (which it has to be if you don't want to throw a code) you may not pass emissions/ODBII testing.

IMHO, leave it if it's working. I went the no EGR route and went back to having it. It is closed at WOT. Period. No biggie.
Here's the EGR How to Gut pdf:Why can't the EGR monitor stay on in a performance tune?

[RacerX]

The valve sends feedback to the PCM of wether it is working or not. I also has the barometric pressure sensor in it. If you shut it off, the PCM will throw a code. If you turn it off, it does not allow a couple other ssytems to go ready. Then you fail your state inspection in NH and MA. Tested this quite thoroughly since I have a friend that owns a garage and another that owns a performance/dyno shop. Some states, it won't matter. Check your states requirements.

[Mr. Man]

So why then doesn't it throw a code if it turns itself off at WOT?

[RacerX]

It's programmed to shut off at certain parameters. Its a controlled valve. No code. As long as it's working within specs.

http://www.aa1car.com/library/egr.htm

[Jeffonebuck]

I'd really love to get rid of that pig, but I haven't read anything positive about deleting it other than appearance. If this car was a rat rod I'd just slide an empty Fosters can over it. I will buy a new one and dresses it up somehow. When I took the TB off I couldn't believe how bad the back side was due to the EGR recirculating the gasses inside the intake.


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[guspech750]

EGR intact on my Eaton swap.

http://img.tapatalk.com/d/14/03/02/asury5yz.jpg

:burnout:


Sent from The White House on taxpayers dimes.

DTR + 4.10's + Eaton swap = Wreeeeeeeeeeeeeeedom

[RacerX]

TB off and you saw... gunk? Are you sure it isn't from the PCV system backflow?

[Mike M]

Are you talking about just capping the tube on the headers and the back of the EGR valve or taking apart the EGR valve to fool the sensor into thinking it's working?
Pros: Emissions, help with burning NOX gasses. EGR is only used at low RPMs and idle. It is closed at WOT.
Negatives: Depending on your state, if this is turned off in your tune, (which it has to be if you don't want to throw a code) you may not pass emissions/ODBII testing.

IMHO, leave it if it's working. I went the no EGR route and went back to having it. It is closed at WOT. Period. No biggie.
Here's the EGR How to Gut pdf:


It is used at idle? Really?

[Mr. Man]

It's programmed to shut off at certain parameters. Its a controlled valve. No code. As long as it's working within specs.

http://www.aa1car.com/library/egr.htmSo the generic tune just turns the switch on or off. To have a performance tune that leaves the EGR on would require hacking into the PCM and rewriting code if I understand correctly.

[Jeffonebuck]

TB off and you saw... gunk? Are you sure it isn't from the PCV system backflow?

Your probably right, I'm just an ole wood butcher. I'll take a few pictures and post them


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[RacerX]

It is used at idle? Really?
No, it starts with load on the engine. Forgot about that. ;)

[EMAS]

The EGR is only active at part throttle cruise when the engine is at normal operating temp. If you get rid of or disable it you will actually hurt the overall performance, MPG and driveability.

The introduction of the 99% inert exhaust gas slows down the combustion process and allows more timing advance, which the factory tune is programed to provide in proportion to the amount of EGR commanded.

The inclusion of the inert gas increases the effective compression ratio, and lowers the manifold vacuum providing a boost in MPG and engien efficiency. In normal part throttle operation the throttle limits how full the cylinder fills. So while a cylinder may have a ~35 cu in volume the throttle only allows it to fill partially, somewhere in the range of 30-60% in average driving so the effective compression ratio can be as low as 3 or 4 to one in part throttle. By adding that inert gas the cylinder will now be filled more increasing the power you are able to extract from the fuel in the cylinder.

That throttle that is only partially open is the reason that a gas engine makes vacuum. Most people think that an engine making a lot of vacuum is a good thing. However creating that vacuum requires energy. Lower the manifold vacuum in part throttle operation and more of the energy produced by the fuel is available at the crank instead of being wasted.

At full throttle the EGR is closed so it doesn't not affect power at full throttle.

In short the only downside to the EGR is the look of it under the hood while it has the benefit of better MPG, though very slight, in the every day driving conditions.

[tbone]

I have a brand new EGR delete kit available. I paid $45 plus shipping. I'll take $40 shipped.

[Limited360]

I think my poor fuel economy has more to do with the lead in my right foot and loving the blower whine than the egr delete that is installed. it does clean up that back corner on a trilogy car :)

[99SVT]

I think my poor fuel economy has more to do with the lead in my right foot and loving the blower whine than the egr delete that is installed. it does clean up that back corner on a trilogy car :)

And the ability to check the transmission fluid.

[Limited360]

And the ability to check the transmission fluid.

Another very valid point I never realized since the trans stick is just... well there.

[Marauderjack]

The EGR is only active at part throttle cruise when the engine is at normal operating temp. If you get rid of or disable it you will actually hurt the overall performance, MPG and driveability.

The introduction of the 99% inert exhaust gas slows down the combustion process and allows more timing advance, which the factory tune is programed to provide in proportion to the amount of EGR commanded.

The inclusion of the inert gas increases the effective compression ratio, and lowers the manifold vacuum providing a boost in MPG and engien efficiency. In normal part throttle operation the throttle limits how full the cylinder fills. So while a cylinder may have a ~35 cu in volume the throttle only allows it to fill partially, somewhere in the range of 30-60% in average driving so the effective compression ratio can be as low as 3 or 4 to one in part throttle. By adding that inert gas the cylinder will now be filled more increasing the power you are able to extract from the fuel in the cylinder.

That throttle that is only partially open is the reason that a gas engine makes vacuum. Most people think that an engine making a lot of vacuum is a good thing. However creating that vacuum requires energy. Lower the manifold vacuum in part throttle operation and more of the energy produced by the fuel is available at the crank instead of being wasted.

At full throttle the EGR is closed so it doesn't not affect power at full throttle.

In short the only downside to the EGR is the look of it under the hood while it has the benefit of better MPG, though very slight, in the every day driving conditions.

^^^Exactly^^^

It may be unsightly but the benefits are worth keeping it and there are NO PERFORMANCE improvements to be had by removing it!!:shake:

[Limited360]

^^^Exactly^^^

It may be unsightly but the benefits are worth keeping it and there are NO PERFORMANCE improvements to be had by removing it!!:shake:

5% fuel economy improvement on a 18 mpg average is 18.9 mpg. That is measurement accuracy and variation in pedal usage along with ethanol content IMO.

Not saying it doesn't help but I also am saying I do not think the benefit of real world fuel economy is justifiable versus how most of us drive these cars. Hell I would be happy 15 mpg average. I am interested to see my fuel economy on the cruise from Detroit to Louisville.

Due to the hassle of removing it and keeping the MAP sensor in it active from it I would say leave it alone unless you hate the look.

[Marauderjack]

It lowers combustion temperatures and slows flame front allowing more timing under part throttle........completely closes at WOT so overall it's a good thing!!:beer:

Put a beer can over it and motor on!!;)

[Limited360]

It lowers combustion temperatures and slows flame front allowing more timing under part throttle........completely closes at WOT so overall it's a good thing!!:beer:

Put a beer can over it and motor on!!;)

I do not disagree on your statement. Still only nets 5% improvement in best cases. Part low is already an inefficient operation point so anything helps indeed...

[Marauderjack]

Also improves emissions but I was deathly afraid to mention that here!!:eek::(

[Limited360]

Also improves emissions but I was deathly afraid to mention that here!!:eek::(

AHAHAH yeah... I would agree on just leaving that one off the table ;)