[mx6_23]

so what i got fromf a recent post you can basically get rid of the EGR for easier tuning, my bud who drives a mustang 2.3 turbo got rid of his EGR and said it made it easier tuning but harder to start in the winter. Any inquiry's, i know ive been asking alot of ?s lately but hey, im going for 250hp without nos and reliable.
modded t bird turbo good for 250 hp? though about just putting the hole t bird turbo on custom. just a thoght.
chuck
and thanks for everyones help

 

[sleepermx6]

how about just taking the egr pipe off from the exhaust manifold, where you wont have to worry about th eegr valve clogging and cuasing less perhaps tunabilty, while at the same time this will help to cool the intake manifold.

 

[monoxidechild]

how about just taking the egr pipe off from the exhaust manifold, where you wont have to worry about th eegr valve clogging and cuasing less perhaps tunabilty, while at the same time this will help to cool the intake manifold.

then ud have a nasty ass exhaust leak if u didnt plug it.

 

[sleepermx6]

no sh$t, i would of never thought of that hum, do you think some one would be that stupid to not plug it just becuase i never said oh and once you remove the pipe dont forget to plug the holes

 

[HotRodMex]

how about just taking the egr pipe off from the exhaust manifold, where you wont have to worry about th eegr valve clogging and cuasing less perhaps tunabilty, while at the same time this will help to cool the intake manifold.

Part of the EGRs function is to cool the combustion process. That's how it lowers NOx emissions at cruise driving. If you take it off and actually had a EGT gauge, then you'd notice how the EGTs cool (1200f) at cruise, and without it the temps stay hot (1500f).

 

[sleepermx6]

how come no one complains of their car running hotter then, as many threads have been posted then you think that maybe some one would of said that from personal experience would warn against this, but no one has, also the egr valve is a eXhaust gas recirculation valve, is a valve used to just recirculate a certain amount of exhaust gases back into the intake manifold to reuse the exhuast gases to help lower the amount of eXhuast gases exiting the tail pipe, it has nothing to do with exhuast gases temps, and if it did it would not make a 300 degree difference, even though exhuast gases are hot. blocking off the pipe is about comparable to the pcv mod, smoother idle and less heat in the intake manifold.

 

[Power6]

as many threads have been posted then you think that maybe some one would of said that from personal experience would warn against this

From personal experience, I would warn against this. Exhaust temp goes up, and fuel economy goes down in cruise conditions. Admittedly I have not disabled EGR on my MX6, but the theory of operation is just the same.

From what I have gathered from other Racers over the years beyond just MX-6's is that without EGR the base fueling tables in your ECU will be off in cruise conditions, because the tables were written expecting some of the combustion chamber volume to be recirculated exhaust gas. Closed Loop feedback is there to correct for this forced lean condition, but corrections for such a big change like disabled EGR may go beyond the intentional limitations of fueling adjustment the ECU can make in Closed Loop.

Also, EGR is used only during cruise conditions!! When you put your foot down the EGR valve is closed. For a street car this means disabling EGR gives you a drop in fuel economy, and possibly higher exhaust temps along with no change when you put your foot down. Hmmm sounds like a good deal, I'll run right out and disable mine.

If you do still want to disable your EGR, the only proper way to do it would be to go to an aftermarket engine control, or to replace your ECU program for one written specifically for no EGR. I don't know if ZombieSS or whoever else offers a no-EGR program.

Now for a race car, disabling EGR gets rid of a system that is not necessary to make power, simplifies tuning, saves weight etc., these are the same reasons you might see a race car without power steering. Power steering is totally not necessary to make Horsepower, in fact it's slowing us all down. Yet I don't see threads about how we all want to take our Power Steering systems out. If you could understand the value of EGR then you might actually want it in your street car.

Sorry to go off, I just take issue with the idea that all emissions equipment is slowing you down and *must* be removed. There has always been those that will think this way, and if they are writing their own fuel maps then they can go ahead and remove their EGR. If however you aren't able to modify your fueling control, then you are better off to leave it alone.

Drew 88GT

 

[sleepermx6]

thanks for the reply drew, and i understood what you said, but im not to sure to agree with your idea on fuel comsumption issue yet, again the egr is designed only for emission purpose only so it may effect it, but never heard of this either, and im not saying take the egr valve off either.with my mods i currently get about 120 miles on a tank of gas, but i only drive about 2 miles to work and back per day and maybe go cruising on friday nights, and i fill the tank about every two weeks, emission on my car is the least of my worries, considering if i had emissions testing then i would worry, but i dont. so let me say this if your worried about emission and your fuel consumption, do not remove the egr pipe.

 

[imagoonmx6]

Keep the system. When mine failed I ran with out it but the loss of fuel mileage and random engine hesitations etc caused me to get another one and install it. The car ran much better afterward. The EGR does so little that it is not worth disabling because it does not affect top horse power. Also in partial pedal situations you will get more power and response due to a cooler over all system.

~Chris

 

[monoxidechild]

ok, i dont agree with the gas issue at all, i have a 89pgt that has the onboard comp thingy that gives me my gas mileage, and it hasnt lowered at all, it still is the same. the only thing that has made it change is when i raised the boost, and when i slapped the blaster coil on it, the heat thing i dont know about cause i have a 160 degree thermostat and it allways runs a bit cool.

 

[sleepermx6]

where did you get the stat and how soon could you get me one

 

[HotRodMex]

how come no one complains of their car running hotter then, as many threads have been posted then you think that maybe some one would of said that from personal experience would warn against this, but no one has, also the egr valve is a eXhaust gas recirculation valve, is a valve used to just recirculate a certain amount of exhaust gases back into the intake manifold to reuse the exhuast gases to help lower the amount of eXhuast gases exiting the tail pipe, it has nothing to do with exhuast gases temps, and if it did it would not make a 300 degree difference, even though exhuast gases are hot. blocking off the pipe is about comparable to the pcv mod, smoother idle and less heat in the intake manifold.

First off, I said nothing about the temperature of the engine , I was talking about the combustion temperatures. The engine temperature will remain constant because the thermostat will just compensate with higher flow, plus the extra heat would be seen at cruising speeds, where the radiator and the engine compartment are recieving sufficent airflow.

Second off, the function of the EGR is not to " help lower the amount of exhuast gases exiting the tail pipe." Why would you do that? So it could go back out the next cycle? It's gotta come out sometime, why waste time delaying it? When combustion temperatures get to high, you begin to make NOx (oxides of nitorgen). Mix NOx with HydroCarbons (HCs, unburned gas), and you get smog. When you put in some already burned gas (exhaust), it displaces burnable air-charge, and the combustion temp (okay, listen, I said COMBUSTION TEMPS, not engine temps or exhaust gas temps, or any other temps) drops under 2500f (I inadvertently put the values for egts in my first post. Combustion temps are much higher.) which keeps NOx from forming. So yes, It does lower it by a few hundred degrees.

Now, analysis. Since you are displacing fuel/air mixture with the EGR system, when you remove the system you are putting in more air/fuel into the cylinders, which will use up more gas. How much more I'm sure is dependent on condition of the vehicle, driving habits, yadayada.

If you don't believe me, drive to your local library (do you know where it is?) and crack open an automotive encyclopedia; just about every library I've ever been to has one. Look it up yourself. I did. That's how I know.

 

[sleepermx6]

:argue:, blah blah blah, whatever

 

[Manifest]

I know with my JabB chip, EGR functionality was either removed or messed up. Because if I run WITH my EGR enabled, it with hesitate and bog during cruise conditions where the EGR should be working. Once it is disabled it run perfectly.

When I tried the EL Prototype chip in my car the same thing happened, so I know this happens with more than just the JayB chip.

My advice, those with chipped cars and re-mapped fuel curves should consider disabling the EGR.

 

[sleepermx6]

besides removing the pipe, what do you mean or how to disable the egr valve

 

[rebel2k4]

:argue:, blah blah blah, whatever

Enough of that immature crap man.

Let me be the first, I DO HAVE an EGT and I did disable my EGR for a while by putting a nickle inbetween the exhaust manifold and EGR pipe. I lost 2-3 MPG and gained 250 degrees on cruising EGT temps. Worth it? Hell no, I hooked it back up asap.
Hotrodmex is absolutely right. Speak from experience or keep your mouth shut.

 

[Manifest]

You can disable it by cutting a new EGR gasket w/out the holes and place it between the EGR unit and the intake.

 

[sleepermx6]

manifest thanks for the info, rebel2k4, the inmature crap is coming from people like you and hotrodmex telling me what to do with my car, worry about your own [email protected] instead of others, and i dont think im worried about 2-3 mpg of fuel loss

 

[Guest]

manifest thanks for the info, rebel2k4, the inmature crap is coming from people like you and hotrodmex telling me what to do with my car, worry about your own [email protected] instead of others, and i dont think im worried about 2-3 mpg of fuel loss

No, the immature crap was coming from you. STFU.

 

[sleepermx6]

well, im done with this thread.