Confused on EGR

Adam, you can run more timing when EGR is functional since the inert gasses dilute the mixture, thus making it less volatile. that is why when some folks ditch the EGR but dont let the puter know, they see part throttle detonation (the mixture is more volatile than the puter thinks [not knowing EGR gasses are not being introduced], and detonation can occur).

and that answers the next question - in a race, both should be equal. basically the puter runs as much timing as it can for any given situation. when EGR is functional, that certainly is not a track performance situation, so it is moot.

im not sure if that was the angle you were going after - if not, my apologies (I hate it when people answer stuff I know and dont address what I am trying to ask).

Exactly what I was looking for.

So basically as long as you tell the computer that the EGR is gone (like with a chip or PMS type setup) then you will have no effect on anything except gas mileage and emissions. At least, this is the way it's sounding to me now.

I like the idea of cleaning up the engine bay, but don't want to hurt myself in the process.

BTW, This seems to be one of the more confusing topics to me for some reason -- as much as I have read about it, I think it's finally coming together. Thanks.

89MustangGX said:

Exactly what I was looking for.

So basically as long as you tell the computer that the EGR is gone (like with a chip or PMS type setup) then you will have no effect on anything except gas mileage and emissions. At least, this is the way it's sounding to me now.

I like the idea of cleaning up the engine bay, but don't want to hurt myself in the process.

BTW, This seems to be one of the more confusing topics to me for some reason -- as much as I have read about it, I think it's finally coming together. Thanks.

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yeppers. Adam, I will let the guys who are into the tuning stuff answer about real-world effects of properly (read including computer tuning) deleting the EGR. I am 99% sure Michael ditched his and let the puter know via a chip; I bet he knows how detrimental the effects are. I would surmise the fuel economy is probably almost negligable (all else being equal). as for NOx, I wonder if accomodations can be made with a chip at the same time.