Dpf question

[bobdabuilda]

Is it illegal to have the dpf removed from the xc90 and how would it affect the car's performance? Would there be an improvement in mpg and bhp? has anyone done it already?

[BestGear]

Not sure if illegal comes into it.

You would need to fool the ECU into thinking it was still there I expect - there are boxes to do this for many cars - I expect the XC is available too. Some cars have the sensor looking for back pressure, so removing sensor and giving it fresh air is enough to keep the ECU happy.


MOT would not be affected unless engine was badly worn and smokey.

Wonder what the insurance would say - as its a mod technically...

MPG apparently improves... not sure on BHP.

David

[bobdabuilda]

Re being illegal I was wondering if the lower emissions due to dpf and therefore tax band would have some implications if it was removed ? Mine is £400 tax so screw Cameron and the rest of em!!

[stuarthartley]

hi just removed the dpf on my missus's renault scenic a couple of weeks ago i'm not sure if its illegal regarding the tax situation but its getting about 6 mpg more and has more power i just sliced the end off it and then took the filter out and re welded it so you can't tell, only thing is there is an emmissions fault code showing now, it can be removed by removing the dpf software from the ecu, but for now it can stay there as it doesn't bother me or her

[SinspeedLtd]

It's not illegal to remove the DPF as it's not a requirement by law for diesel engines to have a catalytic converter or a diesel particulate filter (DPF) in place. It won't fail MOT's for having a DPF removed unless, as mentioned above the engine is badly worn and is smokey.

I wouldn't suggest just taking the filter out and leaving the ECU software untouched as the vehicle could fall into limp mode restricting the performance greatly.

We start by reprogramming the ECU to turn off the DPF settings, then bore out the DPF to the spec of your exhaust system which will give you at least 10Bhp power gains and a minimum of 5-7mpg fuel economy at the same time. You then have the option to retune the diesel injection system which we highly recommend, this will open up at least an extra 20-30Bhp more and take you up to 8-12mpg. Of course, that is with a balanced remap but you can choose to go all out for power or just for economy but either way you will see an increase in both from what it was like as standard.

[bobdabuilda]

and how do the insurance companies look at this mod sin?

[SinspeedLtd]

Insurance companies just want to know of any modifications you do to a vehicle so that it's listed on their database. Even if you change your headlight bulbs.. we've never approached an insurance company although we should really because this is becoming a question which is asked more and more.

I think as long as you explain to the insurance company it is not a visible modification but in fact a mechanical modification to enhance the performance and prolong the life of the vehicle carried out by an independent DPF specialist firm then I can't see them having any problems with it.

I'll see if we can get talking to some of the popular insurers and see what they have to say. Who's your insurer?

[bobdabuilda]

Thanks. Privilege