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Mallone
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Joined: 10 Feb 2017
Posts: 54
Location: London


PostPosted: Thu Jan 23, 2020 3:17 pm    Post subject: '99 3.4 NOx Emissions Spec Reply with quote

Did use the search but couldn't quite find the info I was looking for....

Having just had success with convincing TFL that my 2002 Honda Transalp falls below the ULEZ NOx limit, despite not actually being Euro 3 compliant, I'm looking into seeing if my 996 might escape the penalty too.

Basically I requested a 'Certificate of Conformity' from Honda that showed the NOx emissions were below the Euro 3 level and after sending it off to TFL they have written back to confirm it's now exempt from the ULEZ charge. Result.

I know cars need to meet Euro 4 spec to avoid the ULEZ charge (which the facelift 996's already meet) but my early 1999 car doesn't meet it apparently. Cars that meet the Euro 4 spec need to produce less than 0.08g/km of NOx.

Question is, without me requesting a certificate of conformity for Porsche at a cost of around £100 (and finding out the hard way that it may not pass the test!), does anyone know what the early 996's actually produced in terms of NOx?
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Shalmaneser
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Joined: 11 Nov 2019
Posts: 63



PostPosted: Thu Jan 23, 2020 4:03 pm    Post subject: Reply with quote

I've been thinking about this. If one were to remap the 996 to achieve Euro 4 would that work? And how hard would this be to do? There are various strategies for reducing nox emissions which wouldn't be that hard to emulate with a modern ECU.

However even if you were to be able to do this the the transalp is a motorbike isn't it? I understand there are separate rules created by TFL for motorbikes as opposed to cars - these can be tested individually so presumably there is a bureaucratic route to getting individual bikes approved:

Motorbike emissions testing
We will also accept evidence from test facilities approved by us for measuring NOx emissions. If successful, the test facility will contact us with the results.

Test centres that believe they can offer motorcycle emissions testing to the required standards should email their contact details to ruculezenquiries@tfl.gov.uk.

Approved centres for motorcycle emissions testing
Riverbank Motorcycles Ltd
Unit 12, Riverbank Business Park
Dye House Lane, Bow
London E3 2TB


I suspect that there will be significant hurdles to doing a similar thing with a car as there isn't an approved route... But I don't want to be a naysayer and if you can get this done I'll personally send you some booze of some description.
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Mallone
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Joined: 10 Feb 2017
Posts: 54
Location: London


PostPosted: Thu Jan 23, 2020 4:13 pm    Post subject: Reply with quote

I wasn't really looking to remap the car, although I wouldn't be surprised if that was possible in some capacity, as I think there would be significant expense involved to get it modified and then certified.

The Transalp I talked about is indeed a bike. Under ULEZ they are only required to meet Euro 3 specification for NOx (0.015g/km)

The 0.08g/km of NOx I called out is the Euro 4 value for cars under the ULEZ rules.

The key thing here is that primary measure that the ULEZ is concerned with is the NOx value. As long as you can prove the vehicle is under that specific NOx limit, even if it doesn't meet the official Euro 4 spec overall, then you seem to be able to get an exemption.

Hence me trying to find out what the actual NOx value is for those early 3.4 cars. Might just scrape under the limit....
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Shalmaneser
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Joined: 11 Nov 2019
Posts: 63



PostPosted: Thu Jan 23, 2020 4:32 pm    Post subject: Reply with quote

WRT to the remapping I was just musing on the different options really.

I've done some googling (as I'm sure you have too!) but not been able to find anything. I'm trying to find the body that does the testing (or sign off) but I guess it might be self-certified and hence not public information...
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Mallone
Trainee


Joined: 10 Feb 2017
Posts: 54
Location: London


PostPosted: Thu Jan 23, 2020 5:32 pm    Post subject: Reply with quote

I think you're right. Porsche self certify the emissions information on a per model/engine basis and the only way to access it is to ask them for a certificate of conformity.

This was exactly how it worked with Honda.

I think I'm looking to find someone who has already got a certificate for one of those early cars (the certificates are often also used when exporting the car, registering it abroad etc) and seeing what the data is.

May also give Porsche themselves a call and ask what the NOx number is. I don't mind paying for the certificate if I can find out what's on it! Question
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Shalmaneser
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Joined: 11 Nov 2019
Posts: 63



PostPosted: Fri Jan 24, 2020 12:18 pm    Post subject: Reply with quote

If the certificate is required for export is it also required for import too? I had a look about and there are a fair number of 996's being imported from Japan - might be worth contacting the importers to see if they have the details?
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