DPF....delete?

[Ivo]

Is it just the guys in the UK doing this mod or has it been done here with a T5? 2lts/100 km worse off from 05 non DPF to 09 DPF Multivan.

Yeah, I know its illegal......does not mean I can't do it

[mikinoz]

I'm about to have a straight section replace the cat. I considered putting a straight thru res there but decided just to get pipe welded in.

About 2 weeks off.

Still deciding if I get my muffler removed also.

[Ivo]

What year is you van Mik?

[jfoldbar]

i done. seems a waste of time and considering putting it back. why are you thinking of doing it

[Transporter]

i done. seems a waste of time and considering putting it back. why are you thinking of doing it

How many T5's do you have? Your 04 T5 doesn't have the DPF. First time the DPF appeared in T5 was 7/2006.

[jfoldbar]

well, i dont know why. but mine does. or did. but not the regen type if thats what you mean.

[kaanage]

The it's probably just a catalytic converter - not a DPF (they have to regen).

[Greg Roles]

The pre 2007 diesels would only have a cat like Transporter mentions, and as it is an open cell design, would flow a LOT better than the closed cell style DPF. To remove a DPF ( highly illegal - huge potential fines ) requires some serious engine coding, and beating the VW ECU takes some doing, plenty of places "say" they can do it, but I know of several people caught out there, only a select few have it really cracked, including the extra hidden code, it's very complex. Here is a typical alternating closed cell DPF - forces the exhaust through porous walls, whereas a cat has no blocked ends - more like many drinking straws:





On the Golf with DPF, removal gains you an immediate 15 or so hp, it is that restrictive ( I reckon a cat delete would be worth mabey 1hp in comparison ) and you also get an increase in economy as the engine has less to pump against. Usually the DPF delete tunes then make the most of the removal and offer increased performance, on the GT TDI golf you're going from 170hp to 220hp plus - something you'd definately feel.

I'd suggest people don't bother removing a cat, very little gain on an otherwise stock motor, very illegal - similar potential fines to DPF removal and no one is keen on pollution these days.

I personally have spent years going round and round on this issue, and the current plan is a higher flowing DPF, which may now be a possibility, but a complex and experimental one.

[mikinoz]

What year is you van Mik?

I am a ****, I was referring to my CAT not DPF haha. Sorry.

[Ivo]

Good info Greg, I would leave my DPF in place, just knock the guts out of it so it looks stock. As you say, its finding the right person who can do the code changes properly. Pendle Performance in the UK sound like they know what they are doing. I'm not sure if they have an agent here though.

Do you know of any tuners here in Oz who can do the code properly (PM me if you prefer).