Remapping. Risky? Your thoughts?

Errr, isn’t the DPF there to stop you killing children?
Yes, at the expense of fuel economy from what I've discovered.

My old non DPF D5 returned constant low 40mpg the DPF equipped replacement D5 was low 30's.

Now I've ditched the thing it's now giving me low 40's like the older non DPF equipped car did.

I got rid of it as the DPF kept clogging up despite getting regular extended journeys at the weekend which is supposedly what a DPF needs to keep it happy.

I think the whole DPF idea is a con anyway, it traps particulates to stop them entering the atmosphere then (when it works) uses extra fuel to burn the trapped particulates chucking lots of crap into the atmosphere in the process.

Despite now having no DPF I've noticed no extra soot from the back of the car and it certainly doesn't throw out clouds of the stuff like it used to when "regenerating"
 
Last edited:
Yes, at the expense of fuel economy from what I've discovered.

My old non DPF D5 returned constant low 40mpg the DPF equipped replacement D5 was low 30's.

Now I've ditched the thing it's now giving me low 40's like the older non DPF equipped car did.

I got rid of it as the DPF kept clogging up despite getting regular extended journeys at the weekend which is supposedly what a DPF needs to keep it happy.

I think the whole DPF idea is a con anyway, it traps particulates to stop them entering the atmosphere then (when it works) uses extra fuel to burn the trapped particulates chucking lots of crap into the atmosphere in the process.

Despite now having no DPF I've noticed no extra soot from the back of the car and it certainly doesn't throw out clouds of the stuff like it used to when "regenerating"
With respect Scania, you clearly have no idea how the DPF is designed to work or what extra particulates your car is now putting out because you chose to remove it. Still, at least you are saving a few quid in diesel...

With regards to remaps, I had my Octavia remapped. Just a standard Revo 'stage 1' job. Made it feel a bit more punchy although Revo maps are known for focusing on low rpm torque as opposed to top end figures, or at least that was the case with my map.

It is also the only car I've ever had to replace the clutch on (at about 100k) so take from that what you will!
 
Last edited:
i know someone who has a remapped 2.3 turbo diesel mini bus that was converted into a motorhome.

they have not had any issues and say it drives better with more power than before.
 
I wonder what diesel emission figures would look like as a long term measurement *INCLUDING* a few DPF "regeneration" cycles.... :)
Emissions in what regard though? CO, CO2, NOX or carcinogenic carbon particles?

Exhaust pipe emissions are a balancing act, there is no perfect solution. The sooner we rid our streets of them the better and I say that as someone with a work driving pattern that will make EV ownership a PITA!
 
Yes, at the expense of fuel economy from what I've discovered.

My old non DPF D5 returned constant low 40mpg the DPF equipped replacement D5 was low 30's.

Now I've ditched the thing it's now giving me low 40's like the older non DPF equipped car did.

I got rid of it as the DPF kept clogging up despite getting regular extended journeys at the weekend which is supposedly what a DPF needs to keep it happy.

I think the whole DPF idea is a con anyway, it traps particulates to stop them entering the atmosphere then (when it works) uses extra fuel to burn the trapped particulates chucking lots of crap into the atmosphere in the process.

Despite now having no DPF I've noticed no extra soot from the back of the car and it certainly doesn't throw out clouds of the stuff like it used to when "regenerating"

If I may direct you to this link, which does seem to suggest that what you’ve done is illegal and may also invalidate your insurance;

https://www.rac.co.uk/drive/advice/emissions/diesel-particulate-filters/#:~:text=Yes, it is illegal.,offer specialist temporary car insurance?

But hey, as long as you save a few quid…
 
Last edited:
Last edited:
Alright Greta, don't get your knickers in a twist.

Sure enough, it was only a matter of time.

What is it with people defending others for breaking the law?
After all, those laws are there typically for the benefit of society?

I find it amazing how the “entitled” seem to think that it’s OK to ignore the rules we have, yet they’ll probably be the same to complain about others or the fact that the end result is outright anarchy.
 
Sure enough, it was only a matter of time.

What is it with people defending others for breaking the law?
After all, those laws are there typically for the benefit of society?

I find it amazing how the “entitled” seem to think that it’s OK to ignore the rules we have, yet they’ll probably be the same to complain about others or the fact that the end result is outright anarchy.

"Outright anarchy" will not come riding on the back of Greta's cataract afflicted horse, or through the gutting of a DPF canister, methinks you doth protest too much <LOL>

Outright anarchy will be the result of overpopulation, something that's too hot a potato for most in the media and amongst the world's governments to grasp in a robust manner.
 
Remapped my Saab 9-5 and the next year put a hole in number 4 piston while leaving an Audi A7 3.0 tdi in my dust. :D

Put a recon block and uprated intercooler and has been fine since touch wood.
 
Last edited:
If I may direct you to this link, which does seem to suggest that what you’ve done is illegal and may also invalidate your insurance;

https://www.rac.co.uk/drive/advice/emissions/diesel-particulate-filters/#:~:text=Yes, it is illegal.,offer specialist temporary car insurance?

But hey, as long as you save a few quid…
Whilst it may well be, for all I know the DPF may well already have been deleted prior to me buying it.. ;)

Ultimately, I couldn't care less.

I'm now getting better mpg and the damn thing isn't dropping into limp mode due to a blocked DPF every few weeks.

Besides, I'm well aware that as a country we export many cars & trucks to Africa and elsewhere, the one thing that's done at the point of export is the removal of emission control equipment...

The U.K. is what to global pollution in percentage? Were we all to be 100% green tomorrow, we'd really make a difference?

Don't make me laugh.
 
Last edited:
My car is mapped and it's quicker than standard as measured on a dragy, mpg is about what i expect. It's been mapped by a small/not well known tuner so may well have it remapped by someone better known (i bought it this way).
Better to have off the shelf maps from the likes of superchips. Its more conservative but its been tested properly with many hours of dyno tuning.
Going for a custom map is good if they will be spending 5 or 6 hours on the rollers with your car.
 
Whilst it may well be, for all I know the DPF may well already have been deleted prior to me buying it.. ;)

Ultimately, I couldn't care less.

I'm now getting better mpg and the damn thing isn't dropping into limp mode due to a blocked DPF every few weeks.

Besides, I'm well aware that as a country we export many cars & trucks to Africa and elsewhere, the one thing that's done at the point of export is the removal of emission control equipment...

The U.K. is what to global pollution in percentage? Were we all to be 100% green tomorrow, we'd really make a difference?

Don't make me laugh.
What does a DPF have to do with global pollution? :confused:

I've not spent much time in Africa but a few weeks in Kenya for work was enough for me to be confident in saying that I'd rather breathe the air in any major UK city than even a moderately sized town there. There are many reasons why UK/Euro spec emission control isn't suitable there but things like DPFs being a "con" isn't one of them.
 
If I may direct you to this link, which does seem to suggest that what you’ve done is illegal and may also invalidate your insurance;

https://www.rac.co.uk/drive/advice/emissions/diesel-particulate-filters/#:~:text=Yes, it is illegal.,offer specialist temporary car insurance?

But hey, as long as you save a few quid…
With out wishing to be confrontational, but how the hell does an insurance company check whether a DPF is installed, or not?
Literally part of my job is to see whether a car has one fitted or not, and for the majority of the time it's impossible to see.
Almost all are fitted close to the manifold, and with all the under trays, engine covers etc fitted it's almost pointless looking for one, and just as an aside, removing one certainly doesn't mean an MOT fail (if I can't see it, how can I fail it?, and most modern diesels will pass the smoke test without one fitted).
 
What does a DPF have to do with global pollution? :confused:

I've not spent much time in Africa but a few weeks in Kenya for work was enough for me to be confident in saying that I'd rather breathe the air in any major UK city than even a moderately sized town there. There are many reasons why UK/Euro spec emission control isn't suitable there but things like DPFs being a "con" isn't one of them.
You seem to both see and miss my point entirely.

We export a huge number of end of life vehicles from here to Africa, there, they get a new lease of life albeit with the emission controls we are all slave to removed, arguably why the air you breathe over there is so much worse than ours.

And that's my point, we (ie the U.K.) are expected to follow these regulations yet huge (and by far a bigger percentage of the global population than us) ignore it.

There lies the problem.
 
With respect Scania, you clearly have no idea how the DPF is designed to work or what extra particulates your car is now putting out because you chose to remove it. Still, at least you are saving a few quid in diesel...

With regards to remaps, I had my Octavia remapped. Just a standard Revo 'stage 1' job. Made it feel a bit more punchy although Revo maps are known for focusing on low rpm torque as opposed to top end figures, or at least that was the case with my map.

It is also the only car I've ever had to replace the clutch on (at about 100k) so take from that what you will!
I'm well aware of how a DPF is supposed to work, unfortunately in my case it doesn't in my car that's not worth the cost of replacing it.

So, I face a choice, I scrap the car and replace it at huge expense given it's consistently in limp mode due to the DPF being blocked, or, I remove it, the car is transformed and now drives just fine for a couple of hundred quid...

Unsurprisingly, I've chosen the latter option, although I'm sure scrapping it and buying something new (given the resources required to build it) would ultimately have been "better for the environment"

Yeah, right.

Of course though, I can perhaps sell my 06 D5 tomorrow sans its DPF because I'm killing polar bears, and buy an 05 plate non DPF equipped as standard equivalent as a replacement and sleep well in my bed...

What an ****** joke.
 
Last edited:
You seem to both see and miss my point entirely.

We export a huge number of end of life vehicles from here to Africa, there, they get a new lease of life albeit with the emission controls we are all slave to removed, arguably why the air you breathe over there is so much worse than ours.

And that's my point, we (ie the U.K.) are expected to follow these regulations yet huge (and by far a bigger percentage of the global population than us) ignore it.

There lies the problem.
To coin your phrase "ultimately I couldn't care less" if African nations choose to run clapped out old oil burners because I don't breathe their air.
I'm well aware of how a DPF is supposed to work, unfortunately in my case it doesn't in my car that's not worth the cost of replacing it.

So, I face a choice, I scrap the car and replace it at huge expense given it's consistently in limp mode due to the DPF being blocked, or, I remove it, the car is transformed and now drives just fine for a couple of hundred quid...

Unsurprisingly, I've chosen the latter option, although I'm sure scrapping it and buying something new (given the resources required to build it) would ultimately have been "better for the environment"

Yeah, right.

Of course though, I can perhaps sell my 06 D5 tomorrow sans its DPF because I'm killing polar bears, and buy an 05 plate non DPF equipped as standard equivalent as a replacement and sleep well in my bed...

What an ****** joke.
Modern diesels are complex and costly to maintain, no one is forcing you to own one. Ultimately your car was designed to work perfectly well with a DPF. The fact yours isn't means that it needs fixing. Fixing cars is expensive and when they are not economically viable to fix they go to the crusher, replaced with (hopefully) newer cleaner examples.

You keep talking about global pollution and polar bears, none of that has anything to do with diesel particulates which hang around at street level and get breathed in by people.

Anyway the OP was asking about remaps for performance reasons, not to avoid having a DPF fitted.
 
Last edited:
Back
Top Bottom