Mapping experts. Question about emissions....
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With the current regulations regarding emissions I wondered if its possible to reduce emissions for a given car.
In simple terms, could you take a car which produces around 110 g/km and reduce these emissions to below 100 g/km???
I suspect the engine might need a reducer in the inlet to reduce mass airflow and hence fueling, and therefore the knock on effect would be a drop in power from the engine.
Any thoughts on this??? would it be possible and would it be very complicated to do???
In simple terms, could you take a car which produces around 110 g/km and reduce these emissions to below 100 g/km???
I suspect the engine might need a reducer in the inlet to reduce mass airflow and hence fueling, and therefore the knock on effect would be a drop in power from the engine.
Any thoughts on this??? would it be possible and would it be very complicated to do???
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But with closed loop the fueling is matched to the airflow at the required ratio, so therefore you cant reduce the fueling otherwise it would run lean, so you would have to reduce the airflow to match.
My current car is Tax band 1, and is 109 g/km (£35 a year) but tax band 0 which is 100 g/km or less is Zero tax.
I was thinking that if it was straight forward and I wasn't over looking some complication then somebody could make a killing on designing this conversion for a given car..........
Perhaps a remap chip and an inlet reducer.
????
My current car is Tax band 1, and is 109 g/km (£35 a year) but tax band 0 which is 100 g/km or less is Zero tax.
I was thinking that if it was straight forward and I wasn't over looking some complication then somebody could make a killing on designing this conversion for a given car..........
Perhaps a remap chip and an inlet reducer.
????
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the tax bands are fixed, otherwise everyone would be writing to the DVLA and saying "hey i've done X and Y to my car and now its emissions are lower, can i pay less tax please"
realistacally they will know that alot of cars are never serviced, neglected, and have faults like knackered/blocked EGR's and Cats, so alot of cars out on the roads are pumping out more than the manufacturers stated emissions.
the only way i can see them rebanding your car is to fit a smaller engine which produces less emissions.
realistacally they will know that alot of cars are never serviced, neglected, and have faults like knackered/blocked EGR's and Cats, so alot of cars out on the roads are pumping out more than the manufacturers stated emissions.
the only way i can see them rebanding your car is to fit a smaller engine which produces less emissions.
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So is the emissions set for a specific car irrespective of the actual emissions it produces???
Last edited by CosRush; 20-06-2008 at 04:23 PM.
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The reason that got me thinking about it was that somebody with a similar car had an LPG conversion and the emissions reduced it below the 100 g/km limit and reduced his tax band to Zero and hence No tax to pay........
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they wouldnt be able to administer every car in the country being tested individually, and they wouldnt want to open the floodgate to people claiming they have got lesser emissions than standard.
having 2 fuels on the car like LPG does get you a bit of a tax releif though.
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yep, and there will be plenty of cars out there producing higher than standard emissions due to wear/neglect, and/or power modifications.
they wouldnt be able to administer every car in the country being tested individually, and they wouldnt want to open the floodgate to people claiming they have got lesser emissions than standard.
having 2 fuels on the car like LPG does get you a bit of a tax releif though.
they wouldnt be able to administer every car in the country being tested individually, and they wouldnt want to open the floodgate to people claiming they have got lesser emissions than standard.
having 2 fuels on the car like LPG does get you a bit of a tax releif though.
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