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???

 

surely closed loop reduces emissions?

Getting a car tax re banded due to it would be better but i doubt that would ever happen

 

even if you could do it, it was have to be tested, which would cost you mroe than 10 years road tax lol

 

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.

????

 

i wouldnt be complaining if my tax was £35 a year tbh mate!

mines bloody £260

Sarah

 

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.

 

The Best Man To Speak To Would Be Stu@msd,closed Loop Or Whatever You Want He Can Do!

 

I was however wondering about whether it was possible......

So is the emissions set for a specific car irrespective of the actual emissions it produces???

 

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........

 

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.

 

it will already be closed loop, if its new enough to fall into the new taxation class,

however,im sure each new car is classed for taxation during its type approval...i dont think you can change it.

 

Thanks fella's that is the answer to my question.

 

as above, it's measured to a european standard that is incredibly costly to repeat. so although easy in theory to reduce, difficult to prove

 

Thanks Nick