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ULEZ (Ultra low Emission zone) Euro 4 Compliance

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Julian Carlson
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Julian Carlson PCGB Member
2020/12/18 17:10:46 (permalink)

ULEZ (Ultra low Emission zone) Euro 4 Compliance

I guess I am clutching at straws here, but I am interested to know whether any 911 Carrera 3.2 owners in the Greater London area have a modified their  exhaust system to achieve Euro 4 compliance? I would be ineterested to know how? I am just outside the zone and can avoid travelling through it, but I feel that its only a matter of time before I am impacted by it somehow.
Any thoughts on this lost cause would help.
Best 

4 Replies

IndischRot
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IndischRot PCGB Member
Re: ULEZ (Ultra low Emission zone) Euro 4 Compliance 2021/01/11 08:59:05 (permalink)
I think the odds are virtually non-existent. To the best of my knowledge ROW 3.2s aren’t even Euro 1. I think Euro 1 requires a cat; higher levels require much more in the the way of emissions management and control (better filtering of vapour emissions from the engine and the fuel system, lambda sensors, quick warm-up cats, cleaner cold start, etc, etc). It’s far more than just the exhaust and on top of all the changes you would need someone to certify it and then convince the DVLA or whoever makes the call to accept the certification.
 
And I think it wasn’t until some way into production of the 996 that 911s become Euro 4 compliant?
 
My advice - forget about it. Lobby for classics to be exempt - odds of success are better.
benabrahams
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benabrahams PCGB Member
Re: ULEZ (Ultra low Emission zone) Euro 4 Compliance 2021/01/11 09:40:42 (permalink)
You're correct, I have a 2004 996 that isn't subject to ULEZ.  
 
There is a rolling 40 year exemption for all classic cars, so anything pre 1981 is exempt.  Still 2-3 years before the earliest 3.2's start to become exempt though.  
 
I'm not aware of anyone who has modified a car to meet later Euro emissions standards.  On the face of it, all you need do is to fit a Cat and meet the correct emissions levels... how you would then get that approved I have no idea. 
IndischRot
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IndischRot PCGB Member
Re: ULEZ (Ultra low Emission zone) Euro 4 Compliance 2021/01/13 11:52:32 (permalink)
benabrahamsOn the face of it, all you need do is to fit a Cat and meet the correct emissions levels

 
That makes it sound simple. It wouldn’t be. A 3.2 ECU has no provision for lambda feedback. And the 3.2‘s Motronic and injectors are quite crude when compared to a car that meets Euro 4 - they simply aren’t capable of the fine metering/calibration/monitoring required.
Julian Carlson
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Julian Carlson PCGB Member
Re: ULEZ (Ultra low Emission zone) Euro 4 Compliance 2021/01/14 18:02:14 (permalink)
Thanks for the responses, it makes perfect sense with reference to the ECU. I will take the forums advice a forget about it and just adjust my route should it be necessary. My 3.2 is a 1988 model, so I have about 7 yrs to wait to be exempt!! I will keep an eye on the countdown clock. 
Thanks again for responding !
J
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