EGR - Dodge Dakota Forum

Subject: EGR
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On my 93 5.2L I have the EGR set-up. Is the EGR something I need? Can I get a manifold W/O the EGR and still make my motor run?

janesy
Dodge Dakota
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1/14/2006
15:55:12

RE: EGR
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yes, it will run fine. However if you want to install a turtle, the EGR version is much easier

stu
Dodge Dakota
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1/14/2006
16:03:32

RE: EGR
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Whats a turtle?

janesy
Dodge Dakota
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1/14/2006
17:41:25

RE: EGR
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A piece of aluminum that install into an M1 to boost low end torque

95DAK318
Dodge Dakota
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1/15/2006
14:52:14

RE: EGR
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if you want rid of your EGR,
1. get a new EGR gasket
2. Trace it in sheet metal
3. Cut it out (not the hole)
4. bolt it inplace with the new gasket.

viola! blocked EGR.

Bob Lincoln
Dodge Dakota
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1/16/2006
09:04:13

RE: EGR
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Viola? You play a stringed instrument? 8) Or do you mean "voila"?

Voila, you are then a felon, by removing or disabling an emissions device. EGR valves lower NOx emissions and keep the intake slightly cooler, and actually add to power slightly. Don't remove it.

pettie
Dodge Dakota
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1/16/2006
18:08:40

RE: EGR
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How exactly would an "Exhaust Gas Recirculator", keep the intake cooler?

Bob Lincoln
Dodge Dakota
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1/17/2006
08:25:21

RE: EGR
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"Since exhaust gas is relatively incombustible, it doesn’t burn again. So by being introduced into the combustion chamber, it will lower combustion chamber temps enough so that the Nitrogen doesn’t react with the other compounds and is passed unchanged out the tailpipe thus not contributing to smog."

95DAK318
Dodge Dakota
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1/17/2006
13:43:46

RE: EGR
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it's still hot air.

novaDAK
Dodge Dakota
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1/17/2006
22:00:26

RE: EGR
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Bob Lincoln, I know that the EGR is for emissions, but if it was that important for it, why did they get rid of it for the Gen III Daks?

Bob Lincoln
Dodge Dakota
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1/18/2006
09:33:35

RE: EGR
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The 1996 to 2004 trucks did not need EGR to pass. In 2005, the EGR returned, they now need it to pass.

"it's still hot air."

But it's cooler than the products of a full fuel/air mix igniting. The point is that the temperature of the gases that end up igniting is cooler than without EGR. That's why it works, that's why it reduces NOx emissions.

novaDAK
Dodge Dakota
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1/18/2006
10:19:13

RE: EGR
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so much for the 4.7 being "more efficient"

95DAK318
Dodge Dakota
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1/18/2006
13:43:05

RE: EGR
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So you are saying that the exhaust gasses are cooler that the intake air, and the gasoline combined?
OK
I'll hold the gas tank for 30min, and then the intake for 30min. You hold the tailpipe for 60min. We'll see who is more comfortable after that hour.

Bob Lincoln
Dodge Dakota
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1/19/2006
08:33:11

RE: EGR
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"So you are saying that the exhaust gasses are cooler that the intake air, and the gasoline combined? "

No, I can see that you still don't get it. Obviously, the EGR stream is hotter than the intake mixture. What I'm saying is that the exhaust coming out of a cylinder that has fired a mixture of EGR gases and air/fuel is cooler than the exhaust of just burning a pure fuel/air mixture. Since it burned to a lower temperature, it forms fewer NOx emissions. Capiche?

PB
Dodge Dakota
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1/19/2006
18:04:44

RE: EGR
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I wouldn't worry about the egr valve too much because it only opens at high idle anyway...I think... but yes they do rob power it's not because it is hot air it is because it is not fresh air. Fresh air and fuel burn, exhaust gasses don't.

95DAK318
Dodge Dakota
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1/20/2006
07:24:46

RE: EGR
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ok I do understand what you are saying now.

[quote]The point is that the temperature of the gases that end up igniting is cooler than without EGR[quote]

I read this as pre-ignition.

Bob Lincoln
Dodge Dakota
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1/20/2006
09:03:17

RE: EGR
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"but yes they do rob power it's not because it is hot air it is because it is not fresh air. Fresh air and fuel burn, exhaust gasses don't."

But the way these engine are set up, if you just disconnect EGR, you might get pinging. The cooling effect of the EGR prevents pinging and can actually slightly increase power and gas mileage. Don't forget, part of the EGR gas is unburned gasoline, too.

pinging 101
Dodge Dakota
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1/20/2006
14:39:09

RE: EGR
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Is pinging the same as pre-ignition or detenation?

YeahBut
Dodge Dakota
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1/22/2006
12:06:40

RE: EGR
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Yes, but not the same as knocking.

EL Stupido
Dodge Dakota
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1/22/2006
20:34:03

RE: EGR
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So what is /causes knock?

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