Restriction, what restriction! DPF, say no more

[Jaymz]

From the new VW mag:




This shows why the bigger turbo on the GT can not spin to its full potential. Look at that nasty tin can hanging off the back of the turbo in the first pic

[m0rk]

They clog up nicely on standard cars over here, throwing it into limp mode (or worse)

Severely limits the tuning on them too. It won't be long until someone makes a DPF delete kit though

[Lams]

I quite like the concept of the DPT - for a small price to pay in performance you get a very clean car. I'd much rather a DPT TDI than a Prius for example

[Mischa]

I quite like the concept of the DPT - for a small price to pay in performance you get a very clean car. I'd much rather a DPT TDI than a Prius for example

lol man id prefer a pink bicycle to a prius. down with the dpf its a pos!

[Jaymz]

lol man id prefer a pink bicycle to a prius. down with the dpf its a pos!

Hilarious

[Logzy]

lol man id prefer a pink bicycle to a prius. down with the dpf its a pos!

You forgeot the streamers on the handle bars and the basket with the flowers on the front.

[Greg Roles]

I too like the idea of a "clean" performance car, but the catch 22 is I believe the DPF uses an injected catalyst to burn off the carbon, and if so, the catalyst I read about is a major carcinogen. "Apparently" there is a small tank of this nasty stuff, that needs toping up a few times in the car's lifetime.

IF that's the case with VW ( still looking into this ) it's ultra fine particles and soot, or carcinogens.

My inital thinking was a DPF off a bigger diesel, such as a transporter......

But if the carcinogen thing is true, I'll go with a deletion in a heartbeat! With the right state of tune, I'm sure the amount of soot could be FAR more controlled than most other diesels out there.

[gregozedobe]

Cogdoc, you might want to look into the catalyst info a bit more. If you are talking about the urea injection system that some manufacturers are using to pass the stricter US pollution regs, then I think you'll find this isn't being used by VW on their 2.0 and 2.5 diesels (possibly is on their bigger engines). I have read some stuff about BMW and MB using it. Try looking on the US TDI sites, I'm sure there is volumes of discussion about it there. Or if you really want to exercise your brain, have a look here http://ect.jmcatalysts.com/technologies-diesel.htm

I thought urea was fairly harmless stuff (I certainly hope so, as something closely related comes out of my pen!s every time i take a leak )

If you want to get all hot and bothered about exhaust carcinogens I think you'll find that the VW DPF system creates significantly less than the non-DPF VW diesel engines.

Tuning can certainly reduce the amount of soot produced, but it does this by leaning out the mixture, which unfortunately reduces the amount of power produced, particularly at lower revs (before the turbo is pumping big volumes of air into the intake) - the old "no free lunch" issue.

[OvaltoJetta]

I quite like the concept of the DPT - for a small price to pay in performance you get a very clean car. I'd much rather a DPT TDI than a Prius for example

....and I heard the batteries in the Prius costs about $7,000 to replace if someone needed to do it next week.

[gldgti]

the dpf doesnt use a catalyst and is a non-servicable item...

talking of clean cars.... the dpf catches soot particles...

the soot from diesel engines is not bad stuff, its basically dirt. if falls on to the ground, then washes away or gets picked up and sticks to your car when its wet. it doesnt contribute anything to smog as much as many other things such as sulphur. diesel soot particles are so big that they litterally fall out of the air...

the DPF is a sales technique. diesel soot is an easy target to pick on for emissions, because its visible. doesnt mean its bad.

i'm more worried about petrol engine exhaust myself....

has anyone noticed lately that behind each and every toyota kluger there is a foul smelling cloud of sulphur dioxide? next time you smell something aweful in traffic, i'll bet there is a toyota kluger infront of you.

all petrol 4wd's should be BANNED! NO, BLOWN UP!!!

[Greg Roles]

Hmmm, thanks for the replies. Like I said, I had only heard about catalysts, and the story was from the UK and generic to DPF diesels, so yeah it was only a guess that VW was doing this.

http://www.torquecars.com/tuning/particulate-filter.php

I thought Ultra fine particles from diesels were a problem, in that they basically stuck around in the air and can end up in your lungs causing problems. Hey, I realise petrol cars cause plenty of problems, and don't even get me started about 4WD's carring one school child.

[Mischa]

i cant wait for a company to bring out a complete all-in-one dpf delete. once that happens ill go chip my car the next day

[Jaymz]

i cant wait for a company to bring out a complete all-in-one dpf delete. once that happens ill go chip my car the next day

Better go get your car remapped Mischa, click here to lighten your wallet by thousands

These guys make all the exhausts for the race series.
Am waiting for a quote to come back now. Be awhile before i go ahead and do something like this, but it would be nice to know how much.
It is good that they make it in sections as the cost to build a downpipe locally would cost plenty. Could always organise a group buy for the downpipe and connecting pipe somewhere in the future and have a local guy make up the rest.
Would be inexpensive to have someone local make the rest up as its straight all the way up to the rear muffler which goes into a dogs leg and then has a muffler that would give a Mack truck a hard on!

[Mischa]

id imagine at least 5k for the full exhaust. although possibly a group buy on just a downpipe sounds like a great idea.

[Greg Roles]

Jamie is on the ball as per usual. The pipe looks great to me from the DPF back, nice size and mandrel bent. Just ditch that last giant muffler and see how the middle one copes. I've read the diesel sounds quite acceptable with little to no mufflers, but I've yet to hear a horny diesel so I figure flow is more important than noise. The DPF is indeed the killer, and I'm sure we'll see a delete kit in the next year or so.