My friend has just bought an 07 plate BMW 325d and I'm looking for an 06 on 535d BMW.

Both of us will be getting remaps from Chip who is an Evolution Chips installer for our area. One of the option we both want to take up is to bin off the DPF, as my friend's car will do a lot of short trips and I just don't want the bills DPFs can bring.

So we both need DPF replacement pipes - like decat pipes as far as I can tell.

Who can supply them and how much?

Seen a few on Ebay, but they're silly money and usually include "tuning boxes" which we know to avoid.

Are the replacement pipes just like a decat pipe? In which case maybe we'll get a local stainless exhaust place to make some up.

Anyone know more about it?

Si

 

I beleive the pipe has to have a boss for a sensor.

 

It will depends what the chip is going to be telling the ecu si.is the chip going to tell the engine ecu that it hasnt got a dpf if thats the case u just need a straight through pipe and bin the pressure sensors and temp sensors off, or is the chip going to trick the ecu and give it made up dpf figures and id imagine if thats the case id imagine just as focusv8 has said as you will still need the sensors

 

Also it is likely to be a fail on the mot in the future, even if the car meets the emission limits.

The regs are changing to something along the lines of "catalyst/dpf removed"

 

I too need to know this, really need to get mine off, what a shit system they are!

 

All the sensors still need to be in place as they may be used for other purposes and the ECU will flag fault if they do not work or are removed.

Lots of people just remove the guts from the standard exhaust and then refit it, aftermarket removal pipes can be hard to find.

 

Also for the mot in the future if the boxes are still present bug the internals have been removed, how will they know? They certainly won't be removing them for a look inside,

 

would the cars still pass a normal MOT with the DPF mapped out?
what I mean is can you take the car anywhere for an MOT or will need to be a 'friendly' mot man?

 

No it will pass anywhere as the emissions test on diesels is very easy to pass

 

its about to go down to 1.5% for turbo diesels 2008 and newer, most cars I've tested with dpf's go through on fast pass (1 rev below 1.5% )

 

Most modern diesels have a lower static rev limit, or I'm sure we can add one to most. If they don't rev higher than 2000 rpm while static they will never fail lol

 

i like your thinking, very cunning

Can dpf's be hollowed/emptied in the same way as a cat converter?

 

Yeah, it's just a filter inside that can be smashed out if you can get at them.

Always get the software side of things done and tested first though. Otherwise if there are any problems you need to go buy a new dpf and they ain't cheap

 

so would you be introuble if you got pulled by Vosa or it was known to have been mapped out the system?

is it completely legal

 

no vosa could only do you if your emissions were illegal,

iv managed to trick the ecu before into doing a regeneration to try and save a customer some money and it work a treat

 

our DAF trucks are constantly showing the DPF warning light on the dash.

some times they have to go in as they wont go past 30mph, they are such a shite design these DPF filters

 

Most vehicles have a static regeneration process which can be done in the workshop. If you have the gear to access the function.

 

static re-gen then requires an oil and filter change, cost me £240 and that was at a mates rate type of thing

 

There was some serious concerns over the paticle sizes allowed though dpf units Shen I worked at vosa, they say the particles that come through are so small they can br absorbed through the skin and cause cancer and can be fatal.

It's strange how things go full circle, the emissions are now so tight they produce dangerous emissions, where as the old particles were so big they would bounce up the road, but not kill anyone,

It's a crazy world.

The dpf is nothing but a filter in ths exhaust to catch diesel particles, when the filter gets blocked it's burnt clean by increasing egt.

 

yes we do james i work for a vauxhall in dealer but as im sure youl know most systems iv come across anyway if they have any dtc's in the ecm it will not carry out a static regen.and on this one occasion it had a number of codes stored wich the customer didnt want anything doing with and as they were present codes it wouldnt carry out a regen so i was able to trick the ecu into letting me do one i was quite pleased with myself

 

They were talking of fitting extraction and hsving to wear special suits on the pits at vosa because of the concerns over safety due to this!

 

bit ott dont you think mate?

 

Not if you are in a pit with it all day !

 

sorry i didnt understand what you ment at first but yes in that situation id deffinatly agree

 

It's crazy isnt it? The emissions we now produce are dangerous, infact more dangerous then before dpf lol

 

thats completely mad, whats worse is the general public who buy these cars based on doing their bit for the enviroment are unaware of the dangers they possibly produce to them and their families

 

Yep, and these are invisible so you have no idea when you are being hit by them.

I don't let anything with dpf run in the workshop.

 

Screw the environment issues, they should come with a big warning sticker, saying if you live in any traffic congested area then this vehicle is not suitable for you

 

And where do the particles go I wonder.
Does a man (or woman or child) with a sweeping brush run behind the vehicle collecting the particles or do they just blow out into the atmosphere?

Remind us again of the whole point of the DPF.

Why don't they make the filter removable from the housing like air filters then they could be easily changed and would be considerably cheaper.

The company Transits I drive are specified without DPF.,

 

I dont think any manufacturer teally wants to fit them. But in order for the new cars to meet type approval they don't have much choice as the emissions limits are now very tight. But they are very narrow minded when they make the type approval limits for sure.

 

Found this on this page when I was'nt logged in;

http://www.dpfcleaning.co.uk/

 

Just looked on that site and what a fookin rip off and most dpf iv put on cars have been between 4-800 pounds.
Iv also took a dpf off before and pressure washed it out for about 2 hours and have to say that worked dont think id pay 350+vat to have a dpf cleaned