Implications Of Blocking Off EGR Valve?
 

I just blocked off my EGR Valve using Mazdatrix' plate. I knew my EGR Valve became "useless" ever since I Installed Racing Beat's Header. Actually I am not totally sure If It became useless. What do you think?

What are the dis/advantages to blocking off the EGR Valve? Poor Idling? Poor Mileage? Poor Performance? I have yet to fire up my 88 GXL b'c I am getting my FI's ultra sonicly cleaned today. When I re-install them I don't want to be concerned about any of the above b'c It might be the EGR Valve that might be causing any problems, If any.

polluting the fresh clean air :mad:

The EGR basically tries to burn up any left over exhaust for better emissions thats pretty much it it might actually improve your idle if its off. It did mine cause it was not working. my mileage went down just a bit but removing it did not affect any thing else.

Is this an N/A mod ONLY?? How would I block off the EGR on my TII?

Just pull it off, and slap the block off plate on, Its pretty easy, the bolts are a little hard to get to, but nothing major.

Where is the EGR?

I know it sounds stupid, but all you have to do to disable the EGR is to put a pellet (from an air gun) in the vac line. or remove the vac line and plug what ever hole it left

Actually the EGR valve introduces exhaust gases into the engine to lower combustion temperatures so that nitrogen will not react with other compounds and create pollution (smog). Under hot exhaust temps, with the EGR eliminated, Nitrogen reacts with other exhaust byproducts and becomes Nitrogen dioxide and will form smog.
I've seen on piston engines, when the EGR was eliminated, combustion temps rose to a level to create hot spots and causing the engine to continue to run after shut off.
Don't know about rotaries.

[QUOTE]Originally posted by Turbonut
Actually the EGR valve introduces exhaust gases into the engine to lower combustion temperatures so that nitrogen will not react with other compounds and create pollution (smog). Under hot exhaust temps, with the EGR eliminated, Nitrogen reacts with other exhaust byproducts and becomes Nitrogen dioxide and will form smog.
I've seen on piston engines, when the EGR was eliminated, combustion temps rose to a level to create hot spots and causing the engine to continue to run after shut off.
Don't know about rotaries. [/QUOTe


ah, anyone else know if this happens on our cars? i sure hope not. But then again most EGR's aren't working on our cars.

I have had mine blocked off for 2 years and not had any problems.

The EGR valve also prevents pre-ignition, like someone above said (creates hot spots) pre-ignition is bad, and can cause major damage, aka blown apex seal.....My egr is pluged and I have never had any problems, nor heard the dreadful *popping* sound of pre/detonation....i did however on a D15 honda engine, it detonated frequently going down the road, with the egr pluged. The egr IS emission only, but it works by lowering the cumbustion chamber temp, thus not allowing hot spots to form...and bla bla bla...just my .02

Mines been blocked off since I bought it. The EGR, ACV, air pump, and convertors were gone the first week. Since then Ive thrashed a good 7000 miles on it, and it runs great.

The EGR appears to have little negative effects on the rotary, if any. Mine was plugged when I took it off.

so you can just plug it up and thats it? think i'll do that. thanks fellas! i thought you had to pull that fucker off :D

Plugging it is the cheaper way, yea it will work, BUT why not just pull the whole thing off and put a 2 dollar block off plate on it? you gotta get down there and work anyway, plus sucking in whatever you stuck in the hose would not be very cool.

So to answer my question, even though I have a Racing Beat Header, that blocked off my fresh air supply to the exhaust system (you know the purpose of the EGR Valve, was the EGR Valve useless from that point? Or did It have a function besides that?

does the k2rd egr blockoff plate work for the TII, if not where can i find one.

TurboMike

Yes the K2RD one fits, I cant remember if theyre the same as a N/A. I have one on my TII.

I think Mazdatrix sells them too

When you blocked off the single half inch hole below your rear exaust port, you eliminated the possibility of exaust gas reaching the egr valve, who's purpose is to mix exaust gas with the fresh air entering the rotor combustion chamber.

Since that path is blocked with the header, why block the egr off? I'd just block the vac hose to prevent possible future vac leaks.

which hoses to plug
 

Hey, I searched and have decided to bring this post back from the dead :D

Just wondering about plugging the vacuum lines - would that the be two vacuum lines leading to the yellow selenoid? And if so, do you block both hoses?

the S5's don't even have them :D :D

How did the S5 accomadate the lack of the EGR Valve whereas the S4 are stuck with them? :mad:

The rotary engine has a natural inherent EGR cycle already built into the design...


-Ted

Just pull the plug off the solenoid. Or block the nipple on the solenoid that goes to the egr. The nipple, not the hose. The hose going to the egr should be blocked if you want to keep dirt out.

SO your saying that S5 has no EGR. LOl. Man I have been looking for that thing forever. No wonder why I couldnt find it.

Hailers. Do you happen to have any airpump pics? The setup , pieces hoses exc. thnx alot.

Not sure what you mean. Are you refering to the s4? s5? Or Rotary Engines In whole?