Point of EGR

[bluetoledo]

i have done a search on the above but i cant find anything about why its on the cars? i mean why would ford/seat and who ever else put something on thier cars that make them perform worse? it would cost more and be a waste of thier time? i am a little confused by what its supposed to do and what it actually does do??

 

[glynnd]

Its to reduce the harmful emissions to the atmosphere. Ok it works, but at the expense of allowing SH**t to get back into the intake system. Good idea, bad way to achieve it. Mine is reduced after the map and I have blanked the bloody thing off too. Good riddance!
Glynn

 

[bluetoledo]

ah right ok so blanking it off then does not affect the engine and the way it performs in anyway?

 

[aaronbromley]

was the EGR replaced by the DPF in the Leon's? or am i way off the mark here?

 

[bluetoledo]

is up with all these abbreviations lol. why cant car companies just use real words like real people.

 

[cheshire cat]

by allowing exhaust gas back into the inlet(charge) the amount of oxygen is reduced and thereby the exhaust temp' this results in less nitro' oxides being formed which we are ALL told is a good thing Tis usually only happens at full working temp and whilst cruzing, however this does not allow for either the majority of the igerant from traveling aroud in bliss with their inlets etc 3 parts blocked and useing more fuel-makeing more polution etc and wondering what happened to the get up and go the old girl used to have. Luckily the more enlightened souls on here and elsewhere do some thing about it

 

[bluetoledo]

well i used to have a 2.5 v6 mondeo with exactly the same thing on and i blanked that off because someone said it was worth it but never really understood why. if you dont ask you dont get

 

[cheshire cat]

too Bl**** true

 

[glynnd]

by allowing exhaust gas back into the inlet(charge) the amount of oxygen is reduced and thereby the exhaust temp' this results in less nitro' oxides being formed which we are ALL told is a good thing Tis usually only happens at full working temp and whilst cruzing, however this does not allow for either the majority of the igerant from traveling aroud in bliss with their inlets etc 3 parts blocked and useing more fuel-makeing more polution etc and wondering what happened to the get up and go the old girl used to have. Luckily the more enlightened souls on here and elsewhere do some thing about it

Glynn

 

[devonutopia]

Lets cut to the chase! EGR is NOT a good thing for long term longevity of a TDI engine.... Blocking it is the best thing you can do to help.

 

[leero783]

how can you blank this off is it a simple mod and defo worth doing .pics or links would b top class , any down points to doing this . cheers

 

[Muttley]

EGR is used on diesel and petrol cars to reduce the temperature of combustion at high load demand. This is to reduce the formation of Nitrogen oxides, Nox, which happens at high cylinder temperatures.

Nox is demonised as a smog precursor. The evidence is equivocal, and I for one am not convinced that treating NOx on its own is of any benefit. However, California sets the world's automotive emission control standards.

 

[stuartsjg]

Ive had vagcom on looking at the temps, 4k revs at full throttle there is over 1200C exhaust temp - plent of NOx's being made there im sure!

I know smog isnt a huge prob in the UK but anything to help folk that have breathing problems and im happy with it. Knowing plenty of asthmatics (Fiancee included) im sure they are thankful for our few HP loss in return for improved air quality!

The EGR recirculation is cooled via a heat exchanger by a med temp water take off from the cylinder block. This water then goes to the heater matrix for the cabin heat then to the main radiator.

Blocking the EGR may mean the heater performance is reduced as the water temp will be about half way between the flow to and from the radiator as it wont get an extra topup from the EGR.

Anyway, if you want a few extra HP, put the AC off and your lights, heated seats etc and empty the boot.

Stuart

 

[smithy1984]

this has been done on my cupra and its now of the road been told my turbo has blown they checked my egr valve and said blankin it has caused the damage

 

[cheshire cat]

at high load demand. This is to reduce the formation of Nitrogen oxides, Nox, which happens at high cylinder temperatures.

Nox is demonised as a smog precursor. The evidence is equivocal, and I for one am not convinced that treating NOx on its own is of any benefit. However, California sets the world's automotive emission control standards.

not at high load---------
not used at all on trucks as far as I am aware, X litresX a gazillion trucks, as our colonial freinds say go figure

 

[Hobbiniho]

Anyway, if you want a few extra HP, put the AC off and your lights, heated seats etc and empty the boot.

Stuart

dont forget the go faster stripes and folding down the back for that extra bhp aswell

 

[brightsideteeem]

Lol just unplug the N18 and then it dosnt work

Problem solved

 

[devonutopia]

this has been done on my cupra and its now of the road been told my turbo has blown they checked my egr valve and said blankin it has caused the damage

I'm calling BS on this diagnosis! Would love to hear their technical reasons for this too, especially considering the actual turbo and EGR aren't really connected at all (EGR connects exhaust manifold to the intake manifold only....)

I've now been running almost 4 years with an EGR racepipe fitted and turbos have never been affected.

 

[bluetoledo]

well mines blanked off so im happy. gonna take the turbo off next week and clean that to see if thats why my boost comes all of a sudden. just found out my mate has vag com at his garage so gonna turn the ERG right down. good times

 

[cheshire cat]

this has been done on my cupra and its now of the road been told my turbo has blown they checked my egr valve and said blankin it has caused the damage

seems common on Renaults and X-trail's, their EGR's crap up and stick but have never heard a satisfactory explanation (lot of bull ) but no explanation. with regard to yours I would love to hear their thinking on this, Devon is right VAG's application of turbo's seem to survive reasonabletreatment and regular servicing