Re-mapping to give lower emmissions and less power
Discussion
Now that the government is making it more difficult for diesel tuning by bringing DPF checks into the MOT with the reasoning that modified cars should be paying more VED and are worse for the environment blah blah blah why not re-map a car to give less power and lower C02 emmissions??
Having carried out the work and had it tested/certified at a VOSA test site the taxation class of the car could be reclassified and it would be better for our lovely environment.
I realise this makes too much sense to ever happen due to the loss in VED revenue to the government but it would help people with low value band L cars to keep them on the road and keep the resale values sensible.
Having carried out the work and had it tested/certified at a VOSA test site the taxation class of the car could be reclassified and it would be better for our lovely environment.
I realise this makes too much sense to ever happen due to the loss in VED revenue to the government but it would help people with low value band L cars to keep them on the road and keep the resale values sensible.
Assuming you are talking about modern cars...
Modern cars are already mapped for emissions. Short of limiting the fly-by-wire throttle I can't see how you'd make them better. You could make them different, e.g. more fuel would lead to less Co2 but more Co and HC but overall a petrol engine has the lowest overall emissions when it's running stociometric mixtures, and they already aim for that. Even if you did decide to change something you can't because the cat will stop working. Maybe you could put in a more aggressive timing curve?
There is scope for tuning older cars (especially those with carbs) but generally you'll sacrifice power for emissions/economy unless something is out-of-tune or damaged.
Modern cars are already mapped for emissions. Short of limiting the fly-by-wire throttle I can't see how you'd make them better. You could make them different, e.g. more fuel would lead to less Co2 but more Co and HC but overall a petrol engine has the lowest overall emissions when it's running stociometric mixtures, and they already aim for that. Even if you did decide to change something you can't because the cat will stop working. Maybe you could put in a more aggressive timing curve?
There is scope for tuning older cars (especially those with carbs) but generally you'll sacrifice power for emissions/economy unless something is out-of-tune or damaged.
Engine calibrations in new cars are designed to be the best compromise between drivability, performance, fuel economy and CO2/NOx...and they are always a trade-off between all of them to get the best compromise or match program requirements.
You could probably drop the CO2/NOx emissions by upping EGR usage or reducing fueling but you'd end up with a horrible car to drive or with no performance at all.
You could probably drop the CO2/NOx emissions by upping EGR usage or reducing fueling but you'd end up with a horrible car to drive or with no performance at all.
Manufacturers already do this from the factory to an extent, often the lower output models have a lot in common with the higher output ones but are detuned to bring them into the lower VED band. e.g. when I got my TDCI 130 Mondeo, there was a 115 version available which had exactly the same engine but some changes to ancilliaries, tuning etc.
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