egr block yes or no ? |
Post Reply | Page <1234> |
Author | |
touche
Not Quite Newbie Joined: 18 Feb 09 Location: N. Yorks Status: Offline Points: 14 |
Post Options
Thanks(0)
|
possibly, speak to the tuning company who did your mapping. I know very little about dpf but chances are they turned the egr off or at least right down, because they ignore nox emissions anyway, hence the extra power you get. They probably turned the egr down to help get the boost and power on quicker and get rid of the nasty light throttle running that egr gives. |
|
sti 360
Groupie Joined: 16 Dec 08 Location: bath Status: Offline Points: 40 |
Post Options
Thanks(0)
|
this is why i have not yet blocked mine ,it all sound right to me
|
|
gregozedobe
Vanorak Joined: 22 Dec 06 Location: Canberra, Oz Status: Offline Points: -998266 |
Post Options
Thanks(0)
|
Discussion is fine and good, but if as a relative newbie on a forum you are going to disagree with what everyone else believes (and there are an awful lot of knowledgable people included in this particular "everyone" ie lean air/fuel ratios for TDIs ) you need to back up your argument with some pretty convincing evidence to support your case.
My apologies to anyone who is wondering what a discussion about basic diesel principles is doing in an EGR thread, but I think this theory needs to be dealt with.
Please :
Describe how the power output of a VW TDI engine is controlled.
Don't bother trying to tell me that it is done by controlling the mixture by restricting the quantity of air going into the engine - well not unless you have good evidence that there is some kind of throttle plate functionality unique to VW TDIs that we have all somehow overlooked ?
What is the ideal "target air/fuel ratio" for a VW TDI engine; and what would happen if it is running leaner than that ideal ratio. And yes, I do understand stochiometric ratios, but I am slightly hazy on their applicability to diesel engines, maybe you should enlighten me on that too while you are at it.
Thank you. Edited by gregozedobe - 03 Mar 09 at 21:50 |
|
Baxter
Admin Group Scruff Daddy Joined: 29 May 04 Location: Huddersfield Status: Offline Points: 8060 |
Post Options
Thanks(0)
|
Diesels only run at somewhere near stoichometirc at full chat, by their very nature they, if they ran at shoicometric all the time they would be revving their nads off.
I've never seen a Diesel with a Lambda sensor.
Fact of the matter is that the EGR delete is working, and there are plenty of happy cusomers, which is nice.
No management lights on, less crud in their inlet, some reporting more power, most reporting smoother operation.
So, the facts are that it work and it doesn't put the light on, which is what some where concerned about, so we're all happy.
Sorted.
|
|
touche
Not Quite Newbie Joined: 18 Feb 09 Location: N. Yorks Status: Offline Points: 14 |
Post Options
Thanks(0)
|
Apologies for appearing to be a frosty newbie, but my original query quite clearly related to ecu fueling during egr operation and was quite swiftly told that I am dumb and have no idea about diesels, no, I am not a professional mechanic or automotive engineer but I am not a dumbass. At best, the criticism that I received was both incorrect, off-topic and not a positive contribution to the thread. It could be construed as pointless and provacative.
I was told I was talking rubbish when I wasnt, it was also suggested by the same poster that diesels are different to petrols because they have no throttle plate, absolute and total nonsense, a diesel differs because it is a CI engine that burns diesel not petrol, the fact that they generally have no throttle plate is simply a feature of a diesel engine, because it is a CI engine, it compresses the air and injects the fuel which ignites due to the heat from the compressed air. If everything is relates to the throttle plate, does a petrol become a diesel when the throttle is fully open and there is either no vacuum or boost if its a blown motor? of course it doesnt, its spark ignition that compresses and burns an air/petrol mix. As far as I am aware, a diesel will never get anywhere near stocih, even at full whack. There would be clouds and clouds of smoke. So you are quite right, stoich is to a degree irrelevant. So to summarise- 1. My original comments and queries were entirely relevant to the topic. 2. My critics totally missed the point of the thread which was egr delete, I expanded on that by trying to discuss the ecus fueling strategy during egr operation. 3. Its actually someone else that doesnt understand diesels and modern engine management. There are a few incorrect statements in this thread but I havent singled them out, made presumptions and jumped to conclusions and given the poster a hard time. So, now, YOU tell me how the power output of a diesel engine is controlled, THEN you can tell us all how this is affected by egr operation............and more to the point, how the ecus fueling strategy is affected by deleting the egr and not tweaking the ecus mapping? |
|
smidsy
Yardie Joined: 31 Mar 08 Status: Offline Points: 392 |
Post Options
Thanks(0)
|
i take that the 'e' in your user name is pronounced.
you don't have to be here if you don't want to you know.
|
|
triple
Yardie Joined: 14 Aug 08 Location: worcestershire Status: Offline Points: 645 |
Post Options
Thanks(0)
|
So, now, YOU tell me how the power output of a diesel engine is controlled, THEN you can tell us all how this is affected by egr operation............and more to the point, how the ecus fueling strategy is affected by deleting the egr and not tweaking the ecus mapping? [/QUOTE] I,l tell you how the power output of my vans diesel engine is controlled, with my right foot
|
|
tarka
Groupie Joined: 18 Jun 07 Location: Cornwall Status: Offline Points: 109 |
Post Options
Thanks(0)
|
hmmm, well i would like to start by saying i am not a mechanic and i know nothing about engines, simple.
This is a very interesting thread indeed as i would like to eliminate some light throttle hesitation (which i thought i could only do by a re-map) and now seems i can do with a simple block off plate. One thing i would LOVE to see is a picture showing exactly where this plate is supposed to go.
As for "Touche" i fully appreciate your contributions as you are obviously NOT just guessing at your contributions to this discussion, although it may do you some justice to go a little more on the debate side rather than statement side with your posts. And for existing members to work together to with Touche make an understandable conclusion to this thread as you all have alot of knowledge to offer.
I hope soon i can read a conclusion to say weather or not to do this mod as it sounds very promising so far :O)
Keep up the good work lads!!!
|
|
2004 SWB 174bhp Raven Blue Kombi
|
|
Vdub_heaven
Yardie Joined: 26 Feb 09 Location: north wales Status: Offline Points: 344 |
Post Options
Thanks(0)
|
HERE HERE!!!!
|
|
VW Galaxy 130 in black
220k t4 800 special just died!!RIP Proud owner of an 05 T30 lwb 130 in a whiter shade of grey!! |
|
gregozedobe
Vanorak Joined: 22 Dec 06 Location: Canberra, Oz Status: Offline Points: -998266 |
Post Options
Thanks(0)
|
Sorry, I've officially lost interest in this thread, I prefer to talk to people that at least start off with polite debate.
I'll leave the EGR discussion for those that are interested in continuing, and make my contributions where they are appreciated.
|
|
zedzedeleven
Vanorak Joined: 05 Jan 06 Location: west cumbria Status: Offline Points: 1169 |
Post Options
Thanks(0)
|
Come on greg, don`t take the huff mate, your contributions are valued here, and I personally would like to thank you for them. All forums have a prickly patch now and then, we seem to be having one with this topic. Let`s keep the debate going until it has been resolved.
As far as egr delete goes, I can`t imagine an official dealer would be too keen to do it, mine wouldn`t anyway, even if I offered to pay ! |
|
1.9 85ps swb 2004 in friesan green.
bring me sunshine. |
|
GymRatZ
Groupie Joined: 01 Mar 09 Location: Bristol Status: Offline Points: 157 |
Post Options
Thanks(0)
|
I say block it off.
Not one single reason to keep an EGR in my opinion. I was advised to remove the EGR valve on my Landrover TDi and even given the offical landrover part numbers for exhaust manifold blanking plate and gaskets, and air inlet pipe that didn't have the EGR vacuum pipe. I spent hours cleaning out the plunum chamber (inlet manifold) of carbon deposits that had completely destroyed any form of designed air-flow into the engine. We don't live in the US (Obviously talking from a UK perspective) and if MOT tests can be passed by a 10 year old D.I. engine with 200,000 miles on the clock then a modern diesel engine with super high pressure PD technology/injectors and everything else is going to walk it without any EGR or particulate filters etc etc. My final words. Disconnect the EGR from new before your plenum chamber gets coked up and clogged with sh1t that should ONLY be going out the exhaust. Why polute clean filtered air with carbon enritched abrasive crap air? |
|
https://www.gymratz.co.uk
Gym Equipment & WaterRower shop |
|
RICK
Vanorak Joined: 20 Jan 06 Location: United Kingdom Status: Offline Points: 1521 |
Post Options
Thanks(0)
|
so is it ok to block a 174 with dpf that has been remapped cheers guys
|
|
GymRatZ
Groupie Joined: 01 Mar 09 Location: Bristol Status: Offline Points: 157 |
Post Options
Thanks(0)
|
I would if it were mine and will be doing it as soon as I get one.
As long as the electronickery doesn't mind then it's got to be the "kindest" mod to the engine IMHO. |
|
https://www.gymratz.co.uk
Gym Equipment & WaterRower shop |
|
touche
Not Quite Newbie Joined: 18 Feb 09 Location: N. Yorks Status: Offline Points: 14 |
Post Options
Thanks(0)
|
very good point, why would a newbie whos 'respectfully' told to 'go away and find out how a diesel works' in his first few postings want to come back? The forum wont grow very well with that sort of greeting. I bet the aforementioned 'engine tuner' (who probably could have been a great contributer to a forum like this) wont come back, I bet there are plenty more too. |
|
touche
Not Quite Newbie Joined: 18 Feb 09 Location: N. Yorks Status: Offline Points: 14 |
Post Options
Thanks(0)
|
I think this is getting close to the most relevant post regarding egr delete, it all comes back to that feeling through the right foot during that first 10% or so of throttle where boost is less than exhaust gas pressure (say 5-6psi) and egr is possible. I may not be back, but it would be nice to have somewhere to go and chat if I get problems with my van, also perhaps i could share some stuff I have learnt. The rear left bottom arm fault being one that you may or may not have heard of. |
|
Berisford
Vanorak Joined: 05 Nov 05 Location: Nottingham Status: Offline Points: 1849 |
Post Options
Thanks(0)
|
Well, after reading your post GymratZ I decided to put my blanking plate back. I must say there was quite a bit of black soot on the gasket.
I think you're right, that shit should be down the exhaust!
|
|
Senate Square, Helsinki, 12 June 1993.
|
|
Onefut
Yardie I like pink Joined: 14 Jan 08 Location: North Devon Status: Offline Points: 994 |
Post Options
Thanks(0)
|
OK where do i get one from?
went on brickwerks but couldnt find one |
|
God whispers in our soul & speaks to our heart. When we don't have time to listen, He has to throw a brick.
It's our choice: Listen to the whisper or wait for the brick! 05 Shuttle SE 174 Auto LWB |
|
CLONKY
Yardie Joined: 23 Jan 06 Status: Offline Points: 828 |
Post Options
Thanks(0)
|
|
|
Berisford
Vanorak Joined: 05 Nov 05 Location: Nottingham Status: Offline Points: 1849 |
Post Options
Thanks(0)
|
C'mon Onefut, you don't need no bought in part, just knock one up in ya workshop.
|
|
Senate Square, Helsinki, 12 June 1993.
|
|
Post Reply | Page <1234> |
Tweet |
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |