Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
DG wrote:
I'm not selling it Are you suggesting that what I'm saying is incorrect Rob
Well you know me well enough to know that I will not argue against the laws of physics, but I do question the implied impact on the turbo.
You know just as well as I what position the EGRs are in when there is a demand for power. You also know what a 'cool' engine the TDV6 is and the strategies required (combustion retardation and late injection) to produce EGTs of 600 deg C when required. The turbo is rated to 830 deg C and with blanked EGRs alone and no heat-soak protection it will not get anywhere near this figure. The ECM would have to go utterly mental.
Anyway, that's my 2 cents but I am still willing to listen and learn.
Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 24 Jan 2010
Location: West kent
Posts: 8531
blank and forget
14th Jan 2014 9:27 pm
DG Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50965
Well I'm no expert
All I know is that at low load and speed 50% of the chamber will be full of exhaust gas through every cycle ...take that away and you are left with lean burn high heat combustion...tongue in cheek a bit with the turbo but what impact do these higher temp really have ?21 year LR veteran > D2 GS 2003 > D3 S 2006 > D3 HSE 2009 > D4 HSE 2013 > D4 HSE 2015 > D5 HSE 2018 > DS HSE R-Dynamic P300e 2021
14th Jan 2014 9:35 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
The higher temps are real but still considerably less than you get at higher loads. The impact is more complete combustion, less soot, no oil and unburned fuel in the manifold and increased fuel efficiency.
You will get more NOx of course, but who gives a rats about that.
Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 09 Dec 2013
Location: warrington
Posts: 303
"You will get more NOx of course, but who gives a rats about that."...........nearly fell off the sofa laughing... 2007 Base D3 - Buckingham Blue
Mods...
Off road "adventure XS" air freshener
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All Terrain Racing (incontinence) seat covers
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14th Jan 2014 9:48 pm
DG Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50965
Fairplay ...though I cant believe that they designed the engine operation on the basis that it's OK just to blank them off without some sort of potential penalty on linked components or ECM parameters.
Then again as I would never blank.. so I guess I don't give a rats either 21 year LR veteran > D2 GS 2003 > D3 S 2006 > D3 HSE 2009 > D4 HSE 2013 > D4 HSE 2015 > D5 HSE 2018 > DS HSE R-Dynamic P300e 2021
14th Jan 2014 10:00 pm
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20764
Dave^ wrote:
Disco_Mikey wrote:
Blank them. Fit and forget
Remember, your indy will make more money cleaning/replacing EGR's every x,000 miles. Once they are blanked, they will never cause you any more issues
Mikey, am I dreaming when I say that I'm sure I've read somewhere on here that you were looking into blanking the egr valves themselves, as opposed to the traditional method of blanking the outlet pipe?
My EGR valves were blanked as far back as the exhaust manifolds
No gas flowing through the coolers any more, the valves are not even bolted to the engine anymore My D3 Build Thread
Member Since: 01 Jan 2014
Location: hampshire
Posts: 340
I cant see how blanking the egr will cause the turbo to heat up anymore other than the clean air may produce more power and heat that will pass through the turbo. I think the coolers on the egr are just to stop the hot exhaust gases from entering the engine and undoing the good work of the intercooler. The thing that does worry me is if the egr prevents some of the emmissions going to the exhaust what happens to the dpf once the egr is removed is it overloaded and clogs quicker.
14th Jan 2014 10:49 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
EGRs do lower combustion temps and the coolers are there to protect the EGRs themselves; no EGR equals less particulate matter, not more. UK D3s are not fitted with DPFs.
Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 23 Jun 2013
Location: West Yorks
Posts: 706
Disco_Mikey wrote:
Dave^ wrote:
Disco_Mikey wrote:
Blank them. Fit and forget
Remember, your indy will make more money cleaning/replacing EGR's every x,000 miles. Once they are blanked, they will never cause you any more issues
Mikey, am I dreaming when I say that I'm sure I've read somewhere on here that you were looking into blanking the egr valves themselves, as opposed to the traditional method of blanking the outlet pipe?
My EGR valves were blanked as far back as the exhaust manifolds
No gas flowing through the coolers any more, the valves are not even bolted to the engine anymore
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20764
Less space for the gas to expand into, so more of a direct flow into the turbo (in theory) giving better throttle response. Net outcome is the same.
EGRs are not controlled any more. They are not attached to the car at all
Never done it with the body in place, so couldn't say. Can't see it being too difficult, but not as easy as the usual blanking procedureMy D3 Build Thread
Member Since: 31 Dec 2005
Location: South West
Posts: 23502
I had my 2006 D3 fitted with the Bells Auto Services (BAS) EGR blanking kit. I had experienced issues with the EGR's and had one replaced under warranty.
So before a trip to the Highlands, I blanked the EGR's and also fitted a BAS silicon intercooler pipe as well.
For me, the test for the blanking kit was two days off-roading in Wales, much of which was rock crawling at very low speeds. No issues at all.
EGR's cause trouble, so blanking them seemed the sensible thing to do.
15th Jan 2014 2:34 pm
Basko
Member Since: 17 Dec 2013
Location: HUDDERSFIELD
Posts: 23
I'm no expert, but I would be thinking if the engine didn't need EGR valves they wouldn't be fitted in the first place. I would replace them to be sure. Its big expensive lump to go wrong.
One of mine is stuck at the moment. We noted it on the test book flat lining. Also when you shut the engine down you can hear them self test open/closing but of course only one of them is "clicking". This can also be seem on the test book. One was jumping up and down and then other was flat lining.
The car is running ok at the moment but will get it changed as soon as I can. In the meantime if the car decides it doesn't like it, well I'll get a warming light.
Its bottom arms this weekend as a priority.
Basko.
23rd Jan 2014 5:38 pm
Woolmeister
Member Since: 26 Mar 2007
Location: Chandler's Ford
Posts: 3459
The only reason they are fitted is to satisfy some (no doubt) European emissions directive. The engine does not need them.2021 BMW iX3 Premier Edition in Carbon Black ⚡️🔌
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23rd Jan 2014 5:48 pm
Biffysun
Member Since: 09 Jul 2011
Location: Central
Posts: 1788
^^2005? Why not blank them, cheaper than replacing and I don't think you get a warning light with an'05
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Are you suggesting that what I'm saying is incorrect Rob 
about that.
Why not blank them, cheaper than replacing and I don't think you get a warning light with an'05 
