VW TDI forum, Audi, Porsche, and Chevy Cruze Diesel forum banner
1 - 2 of 2 Posts

· Registered
91 Posts
Discussion Starter · #1 ·

I checked out Revo's page and they have a tune for the 09s but not the 10s. For the 09s they got +20 hp and +50 torque but they had this note about the DPF dated Jan 10:

"Due to the inherent design limitations of the Diesel Particulate Filter and the flawed factory regeneration process, Revo do not offer software for any PD170 DPF application.

DPF: In simple terms (as VW put it) the Diesel Particulate filter is part of the exhaust system responsible for cleaning the engine exhaust gases before they enter the atmosphere.

DPF Function and Problems

The DPF function is to collect soot particles emitted in the exhaust gases. At a predetermined level the DPF supposedly ‘cleans’ itself by a DPF regeneration, a process that increases the temperature with the DPF and burns off the soot particles.

In theory the vehicle should be able to carry out its regeneration process un-aided under normal driving conditions. However in practice the majority of owners find this isn’t the case and will be told by their main dealer that their driving style is not sufficient for the process to function and that the car needs to then be driven a certain way to clear the DPF. VW group documentation says that ‘short’ or ‘stop/start’ journeys aren’t sufficient and the regeneration process may not complete. We know of customers that have been advised by the VW Group that they do ‘too many motorway miles’ for the regeneration to function correctly. VW Group documentation states:

‘Driving conditions in inner-city and any UK Island do not provide optimum conditions for the regeneration procedure’

‘Consider your driving style and length of journey to allow for the driving conditions required for DPF regeneration’ refer to owners handbook.

In a lot of scenarios the regeneration procedure doesn’t complete and allows the DPF to further block and require forced regeneration or DPF failure and replacement; something that’s not usually covered under warranty.

Performance software and DPF

Problems occur when the cars run performance software for the same reasons they occur in standard vehicles, however depending on the driving style these problems can be accentuated when using performance software.
The DPF can block or get too hot causing hesitation and poor fuel economy. Although Revo haven’t had any dealers or customers experience it, there have been reports in the press of dry DPF systems actually catching fire. Issues experienced are typically erratic power delivery and fluctuating fuel economy.

For the above reasons and the inconsistency with these engines Revo has decided not to offer software for any PD170 DPF application.

DPF Bypass

We spent a lot of time looking at potential solutions for this engine, including a DPF bypass solution in the form of an aftermarket downpipe and specific software. We thoroughly tested a DPF bypass setup over an 18 month period before coming to the decision to not support this product."


· Premium Member
23,904 Posts
The 2010 TDI have different ECUs so it will take a while to crack and tune them.

I think the key difference with their disclaimer is that it applies to the 170hp PD, or pumpe duse engine. This was not in North America and the pumpe duse (look through the FAQ for more details on this system) is different than the common rail system. The main difference is control over the injection event and how fuel is injected. I don't know the effect of tuning on the DPF on this engine vs. common rail but my guess is that is why they have this disclaimer. In addition, if you bypass the DPF there is a lot of stuff like sensors in addition to violating emissions standards that will have to be worked around.
1 - 2 of 2 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.