At last! A proper DPF delete.

IF it works, and I can't see why it shouldn't, it will be available with a Viezu DPF delete tune, or the Custom Code delete tune, as I have always thought Gav has the best product, and I believe Viezu outsource the "turn the regen off" part anyhow ( need to confirm ). As the stock DPF stops 90% of the soot, and my experiment will only stop 50-70%, the tunes will need to be tweaked a bit to stop any soot out the back, so I am hoping to see towards the full delete tune levels of power,torque and of course economy. I want a near stock level of visible soot, which is next to none, and then I may have some chance of getting it approved long term.

And no more f'ing regenerations or eventual clogging!!!

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Originally Posted by Greg Roles

IF it works, and I can't see why it shouldn't, it will be available with a Viezu DPF delete tune, or the Custom Code delete tune, as I have always thought Gav has the best product, and I believe Viezu outsource the "turn the regen off" part anyhow ( need to confirm ). As the stock DPF stops 90% of the soot, and my experiment will only stop 50-70%, the tunes will need to be tweaked a bit to stop any soot out the back, so I am hoping to see towards the full delete tune levels of power,torque and of course economy. I want a near stock level of visible soot, which is next to none, and then I may have some chance of getting it approved long term.

And no more f'ing regenerations or eventual clogging!!!

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Stupid question but... Would it be possible to get a less restrictive DPF from one of the Merc CDIs for example?

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Originally Posted by Greg Roles

Building a better version of the DPF that never clogs nor needs regens, flows far better, and can then be used with the "delete" tune is my goal now.

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This sounds just what I'm after. Loving everything about our Mk6 golf wagon - except the bloody regens. Making me think the tdi wasn't the choice for us, though I love how it drives now I'm used to it. When something like this fix is available I'd love to know too!

i had an amarok come in a few weeks ago, customer complaining of constant regens every 300klm and blowing so much smoke he was embarressed to drive it.

He must of been so ignorant of the work that a so called 'vw performance shop' did. It had a 3inch exhaust from the turbo into a cat, ALL DPF sensors still plumbed in?! and a muffler at rear.

The DPF had been deleted, and heck knows what sort of tune they put in.

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Originally Posted by buzuki

i had an amarok come in a few weeks ago, customer complaining of constant regens every 300klm and blowing so much smoke he was embarressed to drive it.

He must of been so ignorant of the work that a so called 'vw performance shop' did. It had a 3inch exhaust from the turbo into a cat, ALL DPF sensors still plumbed in?! and a muffler at rear.

The DPF had been deleted, and heck knows what sort of tune they put in.

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That's scary stuff and it won't be long before it burns up when its regens are underway as has happened to a couple of cars in Europe :).

After upgrading some of our software modules (& no not ecusafe LOL) amongst other funky things we can now do full coding out of the DPF info for a huge range of vehicles, no regens no weird errors etc but I'm still pretty much against it. Apart from the legal side of things I really doubt the gains are going to be much at all unless Turbo chargers have been significantly upgraded - most of the claimed gains will simply be a function of the tune itself. The better way is Gregs Plan for sure

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Originally Posted by parso_rex

I really doubt the gains are going to be much at all unless Turbo chargers have been significantly upgraded

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There are definitely good gains to be had in performance from deleting the DPF, the tune I have is milder in terms of injection quantity than the Bluefin I was running but definitely has more poke and lower fuel consumption to boot.

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Originally Posted by jazd

There are definitely good gains to be had in performance from deleting the DPF, the tune I have is milder in terms of injection quantity than the Bluefin I was running but definitely has more poke and lower fuel consumption to boot.

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Fair enough, you have had both options and obviously logged a few things so perhaps there is some merit in it - I haven't done this but I just find it hard to believe the stock unit could be so bad. If I get really bored one day and someone wants it done I'll do an identical file with only the DPF components removed and try it and no DPF of course

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Originally Posted by parso_rex

Fair enough, you have had both options and obviously logged a few things so perhaps there is some merit in it - I haven't done this but I just find it hard to believe the stock unit could be so bad. If I get really bored one day and someone wants it done I'll do an identical file with only the DPF components removed and try it and no DPF of course

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No logging required, I have compared both files in WinOLS. Not sure if there would be much difference if you kept all the maps stock, it would probably have to be tuned to make use of the extra flow available.

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Originally Posted by jazd

No logging required, I have compared both files in WinOLS. Not sure if there would be much difference if you kept all the maps stock, it would probably have to be tuned to make use of the extra flow available.

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How could you properly compare though, they are from different providers. Different boost, injection quantity, injection timing and smoke maps etc. You could only do it with the same base maps and then start to modify values in both to see if there is indeed improved efficiency with which you could then add more fuel. Or is it that the DPF is very restrictive and you can easily see a trend anyway. I'm not doubting what you say but I like to see all this stuff first hand.

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Originally Posted by parso_rex

How could you properly compare though, they are from different providers. Different boost, injection quantity, injection timing and smoke maps etc. You could only do it with the same base maps and then start to modify values in both to see if there is indeed improved efficiency with which you could then add more fuel. Or is it that the DPF is very restrictive and you can easily see a trend anyway. I'm not doubting what you say but I like to see all this stuff first hand.

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You only need to look at the DPF filter itself. From what I understand what we have in the VWs is a ceramic fibre filter with a honeycomb structure that is actually blocked off at the exit end. The ceramic fibre material is mixed to be porous so that exhaust gases are forced through while soot is trapped and left behind. Consider that, and how much smoke is made on WOT without a DPF vs how clean it is with one, and it's not hard to imagine how much restriction and backpressure this type of DPF would cause. If you had a free flowing exhaust where the diameter is halved at where the DPF would be, you'd probably still end up better off than a DPF...