EGR delete with blower....

[TydlwavS]

Is this a good thing? a bad thing? Does it matter one way or the other?

I was planning to delete this item with the new set-up, but that decision could change.

[Starkie]

The rumor behind EGR is that it reintroduces exhaust gas into the combustion chamber, reducing emissions and helping to cool the combustion chamber. It would allow you to run more timing without detonation. So if that is the case, it may be bad.

But.....at wide open throttle the EGR is closed so it isn't used.

So my post is basicaly useless.


I will go back to the other forums where I can probably be of much better use.

Starkie

[TydlwavS]

What can be said about that;) Thanks?

[johndeerrm]

good thing, tons of people run without it without problems.

[BigCohiba]

Tons of people also run with it, without problems. :D I think it's pretty much a toss up. If you decide to delete it, you can have it turned off in your tune. I guess one could argue it's just another thing that can fail or cause problems at some point. FWIW - I kept it intact on my car and there have been no problems with it.

[white99gt]

The only problem ive had with my egr .Is that under HIGH boost conditions the vaccum hose from the egr pipe (at the header) will come of the sensor.

So im deleteing the whole thing ,esp to clean up the engine bay.BTW mine has been cut off so its just weight sitting around ;).

[98Roush]

I deleted mine and the car stopped bucking. Good thing.

[Khaine]

unfortunately, I managed to spill about 3 ozs of high temp epoxy into my EGR... and now many of my problems went away :)

[Johnny Langton]

Todd-Keep it.
You'll enjoy the nice boost in fuel economy,and the extra timing you can run at lower rpms under light load when cruising without worrying about detonation.Jerry cranked my EGR flow rates up all across the rpm/load band last weekend,and it's really stingy with fuel consumption now.
JL

[TydlwavS]

Thanks for all the replies. I appreciate everyone posting!

[Ed Clark]

Originally posted by Johnny Langton
Todd-Keep it.
You'll enjoy the nice boost in fuel economy,and the extra timing you can run at lower rpms under light load when cruising without worrying about detonation.Jerry cranked my EGR flow rates up all across the rpm/load band last weekend,and it's really stingy with fuel consumption now.
JL

And you can actually see the difference? Hmm.

Like stated previous, while normal driving it's mostly off, mainly it's on at idle and very light steady throttle loads. The EGRs' purpose it so reduce emissions. It does that by using exhaust gas to reduce oxygen in the mixture. Less oxygen mean's cooler burning. So yet you maybe able to run more timing. For a reason. Your engine is preforming less.

If you want to stay legal leave it there. There is a slight amount of unburnt mixture that can be reused in the exhaust.

But there are some cars that once modified may have problems with it. Mine did, so we turned it off. It made no difference in any aspect except it fixed my light load bucking problem. I've yet to see a 4.6L take more timing because of the EGR being turned back on. I'll use the usual quote "Does John Force run one?"

Ed

[Johnny Langton]

Originally posted by Ed Clark
And you can actually see the difference? Hmm.

Most of these "EGR is better" stuff is left over from years gone by when the EGR was a basis of many controls on the car and they engines themselves were not very efficent.

Like stated previous, while normal driving it's mostly off, mainly it's on at idle and very light steady throttle loads.

If you want to stay legal leave it there. There are some cars that once modified may have problems with it. Mine did, so we turned it off. It made no difference in any aspect except it fixed my light load bucking problem. I've yet to see a 4.6L take more timing because of the EGR being turned back on. In fact I like others to explain to me how recycling burnt hot air back into the intake is good for performance. I'll use the usual quote "Does John Force run one?"

Ed
Argue it all you want...If jerry tunes your eec,and you ask for it-he'll change it to have EGR flow at 1500 rpms right off idle.Hell,he can tell it to have a maximum amount of EGR wherever you want it.I have no bucking/driveability problems,and I have a very aggressive EGR table,with a moderate amount of EGR just off idle,and at 2500 rpms it's maxxed out.EGR IS NOT on at idle-it never is.Same goes for WOT-so why delete it on a street driven daily driver?
No,John Force doesn't run EGR..but then again-he doesn't run his funny car back and forth to work every day now does he?
JL

[Ed Clark]

Johnny, you above debating this with me?

BTW, I'm a SCT dealer and all the software I need to tune cars and I have played with the EGR settings.

I edited my previous post to describe how EGR works.

I'll recap.

EGR works by reducing the O2 charge in the mixture. You actually will make less power. You'll need the extra timing to get it back in theory. While there maybe a very minor increase in economy I don't see any REAL performance advantage with it.

Also reread where I said leave it there if you want to be legal.

Thanks,

Ed

[Johnny Langton]

Originally posted by Ed Clark
Johnny, you above debating this with me?

BTW, I'm a SCT dealer and all the software I need to tune cars and I have played with the EGR settings.

I edited my previous post to describe how EGR works.

I'll recap.

EGR works by reducing the O2 charge in the mixture. You actually will make less power. You'll need the extra timing to get it back in theory. While there maybe a very minor increase in economy I don't see any REAL performance advantage with it.

Also reread where I said leave it there if you want to be legal.

Thanks,

Ed
I'm not debating anything,and I know who has the SCT software and what levels of tuning they have.
I also know how EGR works,and the knee-jerk answer to just delete it is not what Todd was asking.There are benefits to it-at cruise RPM you don't need the maximum power to keep the car moving at that speed-it's alot less.
If one wants to delete it-it's their chioce,but it is not the only solution.There is no performance advantage to keeping it,and there's no advantage to removing it-you just lose some of the fuel economy that can be had with it on the car.
JL

[Ed Clark]

Your not saying I gave a "knee-jerk" reaction are you? Cause I don't recall recommending to delete it. Even if that's what you got out of it, my comments were far from "knee-jerk".

There are two advanges to losing it, slightly lower intake temps and weight. :)

Ed

[Johnny Langton]

Originally posted by Ed Clark
Your not saying I gave a "knee-jerk" reaction are you? Cause I don't recall recommending to delete it. Even if that's what you got out of it, my comments were far from "knee-jerk".

There are two advanges to losing it, slightly lower intake temps and weight. :)

Ed
Nope,I'm not saying you did. Alot of the time,people read too far into what is posted,and don't see the big picture unless it's clearly laid out for them to understand.That's why you'll find me posting the alternatives to the typical answer most of the time.
When people think about what their alternatives are-they make an educated decision on what they want/need.
Just like 6 months ago..the "only" way to get more power out of a '96-'98-you "had" to put PI heads on it...
We know what to do with that idea now don't we...:hammer:
It does save a bit of weight to lose it...that 3-4 lbs might be the difference between an 12.0,and an 11.99. :stickpoke
JL

[TydlwavS]

JL, I'm still trying to make an educated decision here:)

I do appreciate some good reasoning. It does help with decision making.

[Talleywacker]

The only reason why I am deleting mine is for a cleaner engine look. Otherwise I'd keep it.

[welding rod]

Here is a middle of the road comment -

I had a bit of surging at cruise RPM and load. I lowered the % of exhaust gas recycled just a little at the problem spot and now it runs like a top.