Is there a benefit to removing the EGR System from our trucks? Does it create lower temps or not? If no benefit, why take it off or block it off.

 

One less thing in the way of a spark plug change.

Besides, sooner or later the EGR system will act up on you, resulting in poor drivability and/or idle problems. The valve itself will need cleaning or replacing, the sensors that controll it will fail...... etc. Ford EGR systems are notorious for that.

 

I just blocked mine off so it still looks stock

Cuts down on upper plenum heat, and you should have SEEN all the carbon buildup in there!

LIGHTNINROD had a good link to EGR info... Linky-linky

...form the sounds of it, I'd rather take it all off, and have my tuner program the chip for it. Right now I'm leaving the guts on, until I have a chance to pull the chip and get it reburned.

 

the egr system reduces cylinder temperatures and reduces oxides of nitrogen.

the reduction in cylinder temps will actually help prevent detonation.

EGR is completely inoperative during WOT conditions, so it does not hamper the vehicle's performance during racing or when full performance is needed.

despite what others will say, removing the EGR has virtually no benefit aside from cleaning up the engine compartment somewhat and possibly keeping a little bit of heat out of the upper intake plenum.

later,
chris

 

Wrong. The extra heat from the egr during cruise does directly effect vehicle performance. Extra heat from egr = more heat into heat exchanger = heats up intercooler fuid = hotter intercooler fluid = less heat transfered to intercooler fluid as air passes through intercooler = hotter intake air temps.

 

NO, I'M NOT WRONG like I said, during WOT the EGR is closed by the PCM, therefore, there is no extra heat from the EGR being flowed through the intercooler. Basically at the dragstrip your EGR valve stays closed.

also as I said, when driving around town the EGR system actually cools the mixture in the combustion chamber. if it is completely dissabled, then your cyl temps will be higher already when you do go for a WOT blast.

my point is that I think it's a useless mod as far as performance is concerned.

If I'm wrong then please tell me exactly how much HP or ET did you gain by disabling your egr system?

 

I've got to side with Chris on this one...read the diatribe under the EGR Blockoff post for more excruciating detail. I think that it's a marginally beneficial mod and probably much more hassle than it's worth to actually do right (and cutting a piece of license plate - while cheap and effective - isn't my idea of doing it right).

Let's see...at the track you essentially let the truck cool down as much as possible, restart it (EGR closed), head to the staging lanes (EGR most likely closed), move up in line at no more than an idle (EGR closed), do your burnout (EGR most likely closed the entire time) and than mash the throttle when the light turns green (EGR still closed)...no extra heat introduced at the track. Cruising around town and looking for a street race is a completely different animal and that's when the EGR would be allowed to introduce the most heat to the intake.

 

Uh-oh. In that case you won't be happy with the ceremic coated soup can lid I'm about to send you Sorry Dan.

 

HEY! I resemble that remark!

Bah - I don't know about you, but in the staging lanes, I don't have a chance to keep the truck cool, as it's running the WHOLE time as you creep up car length by car length. Does it stay closed that whole time? Would have to datalog that one to be sure...

All I know is I'm happy with my free-bee license plate block-off, and if cars ran for decades without EGR, then by-gone-it, I'm running without

 

EGR is closed at idle...

 

Damn you SVTRobG and your Campbell's/Dennison/Starkist solution to my problem! You trying to bring down the brothers out on the left coast by giving them some kind of jacked shiznet for their hoopties??? Did you get my e-mail earlier today?

P.S. I won't need no steenking EGR when I get that sweet exhaust whistle that you were working on for me...wooooo wooooo!

 

At what speed or RPM does it open?

I pretty much knew it wasn't a 50hp mod. Hell, it may not even be a 1hp mod. I wanted to see what good it does with it blocked off, then eventually remove the whole system. It's a huge friggin mess of garbage in the way of a fast plug check. My goal is the fastest 1/4 mile time with just bolt-ons, and never opening up the engine internals.

I wonder how much the whole setup weighs? j/k

 

Here is what I said in the previous post, "Wrong. The extra heat from the egr during cruise does directly effect vehicle performance. Extra heat from egr = more heat into heat exchanger = heats up intercooler fuid = hotter intercooler fluid = less heat transfered to intercooler fluid as air passes through intercooler = hotter intake air temps."

Looks like you agree with me...

Superfords, you said,"EGR is completely inoperative during WOT conditions, so it does not hamper the vehicle's performance during racing or when full performance is needed."

Full performance, for me, is needed usually on the freeway. I have a 2 hour daily commute. I want full performance those two hours.

I can't understand how you can be worried about the little extra heat from an aluminum power pipe but not about 500°+ gasses going into the upper plenum. I'm just estimating because the typical exhaust gas temperature 1" from the cylinder head is 1300° in my truck at 80 mph in 4th gear. The power pipe cools just as quick as the rest of the engine compartment. I do lots of mods at the same time so I can't tell you how much I gained or lost with certain mods. Why don't you go to the dyno and prove it one way or the other.

 

Easter...

Actually, I'd agree with both of you. Cruising speeds will affect it the most but it's also not one of the first (or even tenth or fifteenth) mods that I would do.

 

I must be the only one with autotap or something, but maybe there is someone out there with autotap who would be willing to log intake air temps with and without the egr valve.
Also, teamsls posted, "With a laser thermometer, 165 degrees pre-mod at the manifold/JDM Spacer union. 128 degrees after, all things the same."

37° or a 22% drop