So, P2R makes an EGR Block Off Plate. Does anyone have this or know if it works or not?

http://www.powerrevracing.com/store/...products_id=65

 

It works, but I believe it sets off a CEL, P2R is trying to find a way to make it work without setting off a CEL.

 

So basically this plate just doesnt allow air to flow to (from?) the EGR port into the intake?

 

sooo what is the point of this thing...why would you want to block air from entering the EGR port into the intake?????????????

 

I'm assuming in order to prevent either gunk from clogging it up or preventing the port from sludging up the intake.

 

Interesting.?.

 

The EGR is a valve. It recirculates Exhaust into the intake. (emissions related) it raises your intake temp and adds co2 and builds up carbon deposits. Blocking it off would reduce all of those, BUT you would need to find a way to get the ECU into thinking every thing is working properly

 

OOO that explains everything much better lol sooo how would you get the ECU into thinking everything is working like it should

 

give it a ball to play with or some candy.... works for my kids

 

 

well i would assume routing the exhaust thats being recirculated into another chamber with the sensor in it would trick the ecu and help you pass emissions. or just moving the sensor somewhere else...like the exhaust pipe.

but im sure none of this makes any sense

 

Has anybody actually tried using a plate to block off flow to the intake port ? The EGR valve works as needed, I assume..........so how would the sensor really know if it was on or off ? I've done this on older cars with no apparent problems, but was hesitant to try it as sensitive as our emissions systems are designed now. Ideally, it would be great to divert this flow elsewhere other than gunking up our intakes. Time to think out of the box and get a project going !

 

As far as i'm concerned there's going to be a CEL from either the gunk build up in the intake or from the lack of air flow through the EGR. I guess pick your poison, but i personally dont mind having a perpetual CEL.

 

are the benefits even worth it?

 

probably not if you ask me...

 

only benefit for it is emission control, by like what fattys said, to control the CO and NOX levels in the atmosphere

also it is illegal to tamper or remove any emission control part....well, only way they find out is in the drive clean test (ontario) , but dont know how u americans do emission testing....yearly?

 

It varies from state to state, in CO it's every 5-years, which is great I think.

 

Because the sensor knows when the exhaust is flowing or not. If its not it will trigger the CEL

 

I don't really think this mod is worth it, they should be focusing on completing the 3g IM gaskets.

 

Hey kris is the egr sensor the same voltage an ohms as the O2 sensor from a catalytic converter?
would you be able to trick it the same as the O2 sensor when you remove your cats?

 

The benefit is increase in engine power, because without EGR the intake air will be 100% normal air rather than mixed up with the hot exhaust air. But how much increase ? I guess not much, because this EGR mod is not widely used in the tuning community, whereas removing the catalytic converter is. One caution, both mods are illegal since they tamper with the emission control systems and will increase emissions.

 

In NY OBDII cars don't get tested for emissions on dyno like they used to. Now a days they just plug into your port and get all the numbers they need from there. Basically if you dont have a CEL you'll probably pass emissions.

 

In CA we have every 2 years smog test, and you do the ~dyno~ roller wheels and its plugged into the computer and a tailpipe sniffer the entire time- but the stock TL passes with zero and one as its readouts- thats pretty low~ Ultra Low actually!

I'm old and carbs are my thing- not FI systems-
but doesnt the EGR still serve only to warm the engine quickly when COLD,
by sending hotter exhaust gas to the manifold- for a few minutes- so the engine gets warm and off the `cold run` fuel settings, and onto the warm normal lean settings?
Not on and off all the time when running in town or down the road.

Diverting or blocking it on a carb car (we did on the race car) hurts the cold start-warm up, but does keep everything cleaner- no exhaust crud transfer

Plenty of legal mods do more for you- and its a federal offense and potential 50k$ for tampering or removing emissions equipmen -just fyi,
and places like Ca have started a program of LE education= now officers look under the hood of cars they stop for alleged racing, uh huh, hmmm nope- that exhaust has no CARB sticker- and neither does that...and your so low the headlights are less than 22 inches off the road.... so we are going to impound your car- sorry!

Or they are nice and allow you to replace all the stock parts and go to a special State referee- who decides if its ok for you to pass smog now...and they can be (%^^% if they want.
It makes airport passenger "random" screening an enjoyable experience in compare~

 

EGR valve is mainly used only at idle/light load and acceleration...used by vacuum in the IM


yea in ontario our emission laws r like urs, we basically copy cat ur laws...and yea out tls put out amazing numebrs for the test, i had 0% CO when i did mine in dec...not bad

 

but wait, doesnt it cool combustion chambers to reduce nox? not heat it? shit i gotta find my notes..

 

Too much heat in the cylinders can cause increased NOx levels from what i remember, but dumping exhaust particles into the intake via egr is so they can burn off and not go into the atmosphere.

If the egr is dumping hot exhaust into the intake I dont think it will increase cylinder temps because of less available O2 for the combustion.

 

exhaust temps r cooler than combustion temps, it does lower it, only way to lower nox values is lowering the temp...

 

It's a little confusing. Egr doesn't cool the combustion chamber, but it does lower the temperature of the combustion itself. As more air is added to the fuel mixture, combustion temps rise. This causes higher nox emissions. Adding a metered amount of exhaust to the air leans the mixture out without adding o2. This allowed car makers to run leaner fuel mixtures without increasing cumbustion temps, keeping nox emissions in check.
There's nothing free, however. Lowering combustion temp lowers cylinder pressure. Cylinder pressure pushes the pistons down. Lower pressure = lower power. You might gain some hp by blocking off the egr, but typically spark knock becomed an issue. On modern cars, the knock sensor tells the ecm to retard the timing. This reduces power. My guess is that it would work on a car that doesn't require premium fuel.[Meaning you would now use premium to avoid spark knock in the first place.] Since cars that require premium are already tuned close to point of spark knock, I'm guessing theres not much to gain.
A couple more points... egr does not come into play at idle. Even small amount of egr at idle causes very rough running. Mostly off idle and midrange. Some cars don't use it at wide open throttle. I don't know about ours.
01tl, I think I can help your understanding of this as I too came from the stone age of points and carbs.
V configuration engines had a crossover passage in the intake manifold that allowed exhaust gas to heat the floor of the intake manifold. This was around a decade or so prior to egr systems. Inline engines had them too. Any way the intake crossover was a natural and convenient place for the engineers to put an egr passage. Racers typically used intake gaskets with plates to restrict or eliminate the heat under the intake floor. Blocking only the egr didn't affect the heat, just the egr flow.

 

I think the performance gains should be neglected when compared to the reduction of gunk in the intake. If the EGR was blocked shouldnt less gunk enter the intake?

 

I just read up on EGR on wikipedia- it should answer your questions and end this discussion.
Simply clean the EGR ports once in the cars lifetime and it should be fine.

 

Agree. FOr the small gains if any its not worth it. Now if it were a full blown race setup every bit counts. Also having the ability to fully tune the motor would really help. Something we cant do with any stand alone.

 

It makes sense that it would reduce or eliminate the egr port plugging problem. I just wonder if it might cause a reduction in power or mileage by activating the knock sensor. On cars without a knock sensor, spark knock is all but guaranteed when the egr system is compromised. We need someone to dyno one, and check the mileage.