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Unread 03-14-2011, 07:32 PM   #1
GA05SPORT
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1989 MJ Comanche 
 
Join Date: Aug 2009
Location: Atlanta, GA
Posts: 85
EGR Elimination - Redneck Hot Rodding

So I'm curious... Since I've already removed 90% of the emission crap AND I about to replace the Carter carb with either Motorcraft 2100 or Weber...

SHOULD I keep going forth and just remove all the sensors, EGR and EGR hard pipe and while I'm at it the O2 bung and basically create a factory Redneck performance intake and exhaust?

I'm sending the used obtained factory exhaust to be blasted clean, new SS studs and removal of the O2 and air heater shield before coating with exhaust manifold paint from Quad...

One of my Jeep friends at work ( 90 Cherokee ) could not believe the room in the engine compartment after this weekends emissions Elimination project.

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Unread 03-14-2011, 08:09 PM   #2
superj
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1987 YJ Wrangler 
 
Join Date: Mar 2008
Location: corpus christi, texas
Posts: 6,599
i had it disconnected on my weber 34 running yj and never noticed any difference when i hooked it back up. i have to remove all the other lines still though, the little one from the cat area. its plugged but still hanging on.

that egr valve didn;t seem to do anything for me though so its your call
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Unread 03-14-2011, 08:15 PM   #3
4.7stroker
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1988 YJ Wrangler 
 
Join Date: Apr 2007
Location: Rio Rancho NM
Posts: 4,299
A properly functioning EGR will cost you precisely 0 HP/TQ.
When you are at wot your EGR is disabled. When you are at part throttle up to 10% of the intake charge is exhaust gas, this has the effect of cooling the burn thus reducing NOX and increases gas milage because some of the intake charge is inert gas taking up space that fuel would have. You do not notice the reduction in cruise power because you are not using much power anyway. When you floor it the EGR is disabled and you are back to having full power instantly.
So your redneck performance intake and exhaust gives you no performance gain at all.
However the choice is yours.

Dwayne
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Unread 03-14-2011, 08:29 PM   #4
GA05SPORT
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1989 MJ Comanche 
 
Join Date: Aug 2009
Location: Atlanta, GA
Posts: 85
superj - thanks

4.7 - a couple of my prior automotive lives has given me the impression that while "double burning" some exhaust gas might help things ( mileage/emissions ) however slightly when one has to de-carbon the EGR are and what it's connected to there might be a negative impact. I'm more about eliminating thing which can cause problems than me just being an idiot with not cares about the environment/emissions. In other words I draw the line on these things that can negatively impact me/my ride.
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