Help with diesel 2.0 and exhaust.

[getjet]

... Unfortunatley, Jetta's dont have "real" exhaust tips that are visible...makes me feel incomplete LOL

[benough]

My 2007 Tdi smokes when I put the foot down hard. Unfortunatley, Jetta's dont have "real" exhaust tips that are visible...makes me feel incomplete LOL

I have a stock GT rear valance you can have.

[maxrob200]

I am envious!

[maxrob200]

I have a stock GT rear valance you can have.

Unfortunately I am in Melbourne

[Pearce]

Hence my car's nicknames...

Haha! Love it! I didn't realise until i read this, but i have been wondering for a while!

[Pearce]

So what do people think of fitting a particulate filter to a 2007 mk 5 2.0TDI? Would it be expensive and reduce any power? I love the smoke but i wouldn't want too much of it.

[Gigitt]

Don't do it!!!!!!

DPF is a restriction. If your cars does not have one why put it on!!!

Spend you money on a ecu tune and do a mufllerectomy.

With a good tune you will get power and can get a cleaner exhaust if you like

[Diesel_vert]

So what do people think of fitting a particulate filter to a 2007 mk 5 2.0TDI? Would it be expensive and reduce any power? I love the smoke but i wouldn't want too much of it.

Only if you have more money than sense.

The diesel particulate filter (DPF) alone will set you back around $3500 from the dealer (though probably cheaper if purchased overseas), and that's before you consider other miscellaneous parts and labour (installation and configuration) costs, and that's before you find anyone with the knowledge (or is even willing) to retrofit one onto a VW Golf in Australia... or any passenger car... in Australia.

Not to mention that a DPF has a finite service life (approx. 160 000 km, give or take 40 000 km depending on the engine, DPF and driving patterns) which current owners of DPF-fitted cars are dreading due to the cost of either cleaning it (through disassembly) or just replacing it ($$$), but that doesn't matter since you can dip into the savings from all the petrol you didn't burn by having chosen a diesel-powered car in the first place.

Other than that, it's not a bad idea.

[kaanage]

There are so many people who would love to donate their DPF to you () but without the proper support in the ECU to regenerate it, it would quickly clog unless you drove flat out or on highways all the time.

I'm surprised by how little my car soots on track days but around town, it can dump a pretty dark cloud when I floor it from low rpm and let it rev out, especially if I've been in hypermile mode for a while, so that the exhaust flow is low and soot build up in the system.

My favorite was when I dumped on a guy double-parked on a busy road so that his wife could load her shopping (a tail-gating Golf R was my second favorite)

[Greg Roles]

Soot is a waste of fuel, and shows you have inadequate airflow. Gale Banks, THE diesel guy in the USA is correct that soot is unnecessary on all but full out drag diesels, and if your car is sooting, you need more air. All the twin cams, multi-valves, tumble flaps, swirl patterns, piston design, injection pressures and ever increasing turbo flow is all designed to make the most of the fuel, and avoid soot, which is an incomplete burn.

To keep soot down, get a proper tune, from a diesel specialist. Anyone can ramp in extra fuel, but can they then get it optimised, to avoid waste and thus soot?? Make sure your air intake and exhaust are free flowing, and if needed go for a better turbo, but that's the last thing to do, and a major mod.

Diesels should only soot a little on acceleration whilst the turbo is off boost. If it's sooting on boost, your tune is too rich, and you are just wasting fuel. Soot all the time does not equal power, it just says you don't have an optimal tune, and yes that is how they come from the factory - not optimal!

[kaanage]

To keep soot down, get a proper tune, from a diesel specialist. Anyone can ramp in extra fuel, but can they then get it optimised, to avoid waste and thus soot??

Maybe my Viezu tunes (all three of them) need some adjustment ....

[manol]

So what do people think of fitting a particulate filter to a 2007 mk 5 2.0TDI? Would it be expensive and reduce any power? I love the smoke but i wouldn't want too much of it.

lolwat?

[Pearce]

Alright thanks for some great info. I haven't had time to research before i question so excuse the remark about the particulate filter.

[Greg Roles]

Maybe my Viezu tunes (all three of them) need some adjustment ....

Tuners will always play it safe and run tunes richer rather than leaner when chasing power on a diesel, and most certainly so with petrol cars that can't handle running lean! If you got a Blue Optimize tune, there would be zero soot, but so too limited power. Horses for courses. Soot isn't a necessary thing, that is all I was trying to say, but many things, mainly airflow, cause it.

[kaanage]

One of my tunes is the 'Economy' map but it was created well before the Blue Optimize thing came out. It still out performs the stock map quite noticeably but rolls off much earlier than the other maps I have. And it still soots if nailed at lowish rpm.