Would just like to ask the question, since I've been thinking about it for my Vrs tdi now it's well out of warranty but having no intention of changing it.

Dpf ... Is it worth removing it ?? And if you have, have you had any MOT problems ?? ....

Many thanks for any comments

DPF removal in my opinion is worth it as it will be required to me remapped along with the DPF removal. But I only had my old car done as my DPF was shot.

MOT wise it shouldn't be a problem as only a smoke test is carried out on diesels. You will have to get the innards removed and not a replacement pipe as the tester looks for the presence of the DPF housing.

Just make sure you use a reputable tuner as some of the cheaper ones have been known to do a gash job of removing most of the on board diagnostics along with the regen programme. Try JabbaSport or Shark.

You'll be looking at 200hp ish and roughly 340lb ft of torque.

PD or CR by the way as the CR engined cars don't have too many DPF issues as their PD brethren?

Unless it is giving you any problems then I'd be tempted to leave it alone for now. If you have issues with it in the future then that would be the time to have it removed. Just my own opinion of course.

Unless it is giving you any problems then I'd be tempted to leave it alone for now. If you have issues with it in the future then that would be the time to have it removed. Just my own opinion of course.

Yep. If you had a PD engined car you want to get remapped anyway then you may as well lose the DPF, but if its not causing issues and you are happy with the car then why bother?

If you have the funds available, do it! Had mine done at Shark recently and haven't looked back! Had dpf and egr ditched and pulls like a train now.

Phone tony at shark and get booked in!

DPF removal in my opinion is worth it as it will be required to me remapped along with the DPF removal. But I only had my old car done as my DPF was shot.

MOT wise it shouldn't be a problem as only a smoke test is carried out on diesels. You will have to get the innards removed and not a replacement pipe as the tester looks for the presence of the DPF housing.

Just make sure you use a reputable tuner as some of the cheaper ones have been known to do a gash job of removing most of the on board diagnostics along with the regen programme. Try JabbaSport or Shark.

You'll be looking at 200hp ish and roughly 340lb ft of torque.

 

I know I am probably beginning to sound like a broken record, but that is a myth. There is no requirement for MOT testers to check for the presence of a DPF or cat on a diesel. They carry out a standard smoke test and that is all as far as diesel emissions go.

You may be right on that one at present but someone on this forum posted the new MOT guidelines that the tester will have to check for presence of DPF housing.

You may be right on that one at present but someone on this forum posted the new MOT guidelines that the tester will have to check for presence of DPF housing.

Gut and refit... job done!

Cheaper than buying a replacement pipe too :-)

You may be right on that one at present but someone on this forum posted the new MOT guidelines that the tester will have to check for presence of DPF housing.

 

The 'new' MOT regs came into force last year and make no mention of DPFs whatsoever. They have to check the presence of a catalyst on spark ignition engines (ie petrol) but there is no requirement to check for the presence of a cat or DPF on compression ignition engines. Its worth checking some of fordfan's previous posts on this subject as ISTR he is an MOT tester, and backs up what I'm saying, as do the official MOT regs published on VOSA's website.

 

I'm not having a go at anyone, but my 'broken record' comment was due to the fact that this myth about visual inspection of DPFs during the MOT seems to circulate endlessly on various forums and there is no truth to it at all, for reasons that I have posted on here & other forums numerous times before.

Thanks everyone for all the replies, very much appreciated. No this is no specific problem at the moment apart from the usual slight stutter at times on the throttle which is I'm told is likely to be the EGR and having to take it up the motorway every couple of months just to make sure on the re-gen ... Just thinking ahead really and have a plan in place if something does happen.

I'll give you my honest opinion on Wednesday, in terms of performance, as I'll be going from Shark stage 1 to DPF-Gut and Shark stage 2. 

 

This is as I've got DPF pressure sensor failure and intend to keep my car for a few years, so I figure it'll be cheaper in the long run as the DPF will fail at some point. This is because, even if it works perfectly, the regen's cause ash to be left behind and eventually this ash will clog it beyond a useable point. 

 

Mine is a face lift common rail. 

 

Cheers.

Please do Sko-with-go I would find that very interesting ....

Please do Sko-with-go I would find that very interesting ....

 

Will do, dropped the car of this morning and really looking forward to collecting it on Wednesday now 

 

I'm having other stuff done as well: Cambelt and water pump, major service and coilovers fitted, hence leaving wit with forum sponsor CNTuning for a couple of days 

 

I believe that the peak power increase is only about 15-20 Bhp, but that there's big power and torque gains throughout the rev range - we'll see how the car drives weds though

Does removing the dpf give a performance increase?

Does removing the dpf give a performance increase?

 

according to revo website it does...........and I'm sure other tuners say the same.

 

Martin, interested in hearing the results of the remap and coilovers (what did you go for in the end?)

Does removing the dpf give a performance increase?

 

I would assume so due to the decrease in back pressure, had mine done and the power delivery is noticable shal we say.

 

cars returning average of 52 mpg with daily driving - 700 ish from a tank on a long drive.

 

car pulls strong and smoothly from very low revs, Tony at Shark said mine should be up around the 200bhp mark.

Does removing the dpf give a performance increase?

 

To answer this, and the general question about whether this is worthwhile here are my thoughts;

 

I was running a Shark Stage 1 map before the DPF delete and I'm now running an 'out of the box' Shark stage II DPF Delete map - i.e. off the shelf map that takes into account the greater flow characteristics of a DPF with no 'internals' in it.

 

Personally, I feel this is significantly better than 'just' stage 1. I can only go by how the car drives which, lets face it, is more important than how much extra 'peak' power and torque it makes. 

 

The car wasn't RR'd at stage 1 and hasn't been RR'd at stage 2, so I can't answer how much more power it makes anyway. What I can confirm is that the power delivery is smoother and more linear, the car feels like it has more torque throughout the rev range and now drives even more like a good petrol turbo in terms of retaining power higher up the rev range. 

 

I'd be very surprised if there were too many people who felt disappointed going from Shark stage 1 to Shark DPF-GUT and stage 2, but i can't talk about other tuners software. Someone going from 'standard' straight to Shark stage 2 will probably be jumping up and down with delight afterwards  

 

Also, my car is not smoking at all, no dodgy fumes or clouds of black smoke - seems just as clean as it was when the DPF was intact.

 

For clarity, my car is a Common Rail 'face-lift', so I can't comment on the results with the PD170. 

 

I am an honest person, if I thought it was Carp I'd say so

according to revo website it does...........and I'm sure other tuners say the same.

 

Martin, interested in hearing the results of the remap and coilovers (what did you go for in the end?)

 

KW variant 1 Innox, slightly more expensive version of the ones fitted to your uncles car

 

I'll post a few pic's in a bit  

Thanks very much for the good info Sko-with-go .... I have an 07 plate pd so would be interesting to see how much the difference would be from the cr ... Will have to think about it.

Thanks very much for the good info Sko-with-go .... I have an 07 plate pd so would be interesting to see how much the difference would be from the cr ... Will have to think about it.

 

If you are standard currently I think you'd be amazed if you went straight to stage 2, gutting the DPF in the process. From what I can gather the PD 170 is equally impressive after this work

according to revo website it does...........and I'm sure other tuners say the same.

 

Martin, interested in hearing the results of the remap and coilovers (what did you go for in the end?)

 

Here's the Pic, click for bigger image

 

Does removing the dpf give a performance increase?

 

On a PD170? Yes. Yes it certainly does...............