Thread: EGR kits,, do not buy!!!

Originally Posted by Dougal

The description is quite wrong.
Nitrogen oxides (NOx) are not burnt, nor do they cool anything.

EGR is used to displace excess air (and oxygen) in the cylinder with inert exhaust. Because the cylinder now has less oxygen present, it cannot form as much NOx.
EGR on a diesel does not cool the combustion, the main reason people disable it is to keep soot out of the intake.

EGR in a throttled petrol engine is used to cool the combustion, which also aids in reducing NOx and throttle pumping losses. This can reduce part load fuel consumption, however it doesn't apply at all to diesel engines.

so basically it was added to ''cheat'' the emmision standards of the time?
instead of improving the combustion/performance to reduce the emmisions.

cheers phil

Originally Posted by stig0000

since I own a td5,, as like most people who own a td5 I have thort about the EGR removal kits,, and reading allot about people that have done it an 'say' they get better performance with a EGR kit,


after doing alot of reading and asking around, and just completing a emissions training week at landrover training in Sydney, I have asked landrover about the td5 egr kits,, and with what we learned about emissions that the kits have 100% no effect on performance,

if you don’t know how egr works Google it, but in short it helps Bern one of the 3 main gasses in the exhaust from your engine, once of which is NOz, when this gas burns it cools the oxygen around it down,, cooling your combustion chamber down, which makes the burning of the fuel more efficient(sort of like when people NOS there cars), in turn better fuel consumption, and helps in the cooling of your engine,

the only way EGR will hinder a engines performance is if its faulty, an most cases stuck open, letting the exhaust into the manifold all the time, but other than that it has no effect on performance,

So if your like most people out there that is looking at the EGR kits for performance, don’t get it unless you have a egr fault, which in that case is better to get it fixed, not taken off,

As always im open to all comments,

You seem to be one mixed up person, and you come here and pass on a lot of misinformation. You also contradict yourself in the same post.

poo. posted to the wrong thread.

Interesting,

You theory may be correct - I'm not technically qualified to comment.

But the real world experience of many many people here - is that the IS a very significant difference.

In my case there is no question that removing the EGR and replacing it with a more free flowing pipe made a very noticable difference to the way the car drove.

Some people may think it's a placebo thing - But Mrs Bytemrk had no idea I had done that work - and the first time she drove the car she commented to me asking if I had done something as it seemed smoother and more powerful than it was.

Personally I'll take real world experience over theory any day..

Mark

Originally Posted by discowhite

so basically it was added to ''cheat'' the emmision standards of the time?
instead of improving the combustion/performance to reduce the emmisions.

cheers phil

Well you could say that, but can you really label it as "cheating" if it worked?
The reality is, without EGR many engines couldn't have been sold.

EGR is still a part of emissions control schemes, both diesel and petrol. But some now are completely internal (trap exhaust via the valve action instead of taking it back through the intake manifold) and others have sophisticated filtering and cooling systems to remove the problem of EGR soot mixing with oil and clogging up your intake ports.

I'd like to know what diesel engine efficiency is possible without meeting emissions regs. In other words, "how much improvement can we expect as better emissions strategies are discovered?"
Modern TDi engines are already beating previous engines (albeit not by much) for outright efficiency at the same time as meeting more stringent emissions controls.

Originally Posted by Bush65

You seem to be one mixed up person, and you come here and pass on a lot of misinformation. You also contradict yourself in the same post.

I don't think theres any doubt that the LR people have filled his head with a lot of seemingly credible b......t, but as he said he's open to comment. I think the info he posted has been pretty well disected and shown to be incorrect.

Attacking the man and not the ball doesn't add constructively to the debate.

Deano

I like the theory.. But in practice the results are very different..

*Note, vested interest as I sell the kits!*

Interestingly please note South African spec TD5s do not, and have not, ever used EGR ...

Improved low end response, improved engine cleanliness etc are side effects of removal of EGR on a TD5.

Chipped TD5s with removed EGR still pass all MOT testing and would pass testing in AU on emissions too.

As I thort this would bring on a massive debate, not a thread to start fights, just a difference of opinion, also EGR is something that allot of people don’t no how it fully works and what its dose/for,

as I was in the same boat as others considering getting a egr kit, for the resion of better performance. Which is what most people are when buying this kits, and if you look at adverts for this kits its one of the main selling lines,

I am only going off info that I have studied, an been tort to be a Tec on landrovers,
And not from a tafe, land rover them self’s, so if there wrong, the people that made and tested the engine are wrong??,

the way I see it is if egr did damage to the engine,(not just td5s, all car makers) and did nothing for the emissions or the engine, it wouldn’t be there, it’s a complete waste of time and millions of $$ to car makers,

as for performance, EGR is only in operation in the right conditions for the ECU to activate it, but as soon as you do something its shut off faster then you can think to put your foot down. It is like this for the very resion in not hindering the performance of the engine,