MK5 Golf GTI

General => Random Chat => Topic started by: rdfcpete on March 03, 2012, 08:47:01 pm

Title: Downpipe On TDI Engines
Post by: rdfcpete on March 03, 2012, 08:47:01 pm

Guys,

While keeping an eye on the world of TDI tuning/development, I'm curious to know whether it's possible to fit an aftermarket downpipe to a new'ish diesel engine with a diesel particular filter (purely for power or performance gains) while retaining the OEM DPF setup i.e. without removing the factory DPF?

The specific engine is the current VAG TDI 170ps block that's in the current A3 and Golf GTD if that's enough info to go on(?).
I know very little about diesels (never owned one...) and I know some of you know lots :happy2:

Thanks
Pete.

Title: Re: Downpipe On TDI Engines
Post by: Andy on March 03, 2012, 09:35:38 pm

Think with the dpf still in place there won't be a lot of gain in performance

Title: Re: Downpipe On TDI Engines
Post by: PDT on March 03, 2012, 10:10:17 pm

Downpipe and dpf are the same part on the 170hp vag engines.  Milltek replacement is a nice one as it retains all sensors but eliminates the DPF element.

Title: Re: Downpipe On TDI Engines
Post by: rdfcpete on March 04, 2012, 12:40:07 pm

Quote from: maxitrol on March 03, 2012, 09:35:38 pm

Think with the dpf still in place there won't be a lot of gain in performance

You're right from what I've seen Andy, and cheers - it did cross my mind :happy2: Wanted to retain the important OEM stuff that in that area.

Quote from: PDT on March 03, 2012, 10:10:17 pm

Downpipe and dpf are the same part on the 170hp vag engines.  Milltek replacement is a nice one as it retains all sensors but eliminates the DPF element.

Thanks Dave. Will that retain the factory Cat parts too? I wouldn't wanna' decat either if it can be avoided which has implications I wouldn't really want to have to worry about :scared:

Title: Re: Downpipe On TDI Engines
Post by: PDT on March 04, 2012, 05:14:43 pm

Cat and dpf are the same part, can be removed 100% legally as there are no requirements for them for MOT regualtions.

Title: Re: Downpipe On TDI Engines
Post by: rdfcpete on March 04, 2012, 05:35:48 pm

Quote from: PDT on March 04, 2012, 05:14:43 pm

Cat and dpf are the same part, can be removed 100% legally as there are no requirements for them for MOT regualtions.

What are the downsides to removing DPF/Cat on TDI engines from an ownership POV, such as the 170 TDI?

Where you gain power and torque, do you lose practicality anywhere? Ta  :happy2:

Title: Re: Downpipe On TDI Engines
Post by: nezquick on March 04, 2012, 06:55:16 pm

Is it a

Title: Re: Downpipe On TDI Engines
Post by: mortygttdi on March 04, 2012, 10:25:23 pm

Pete has long has the dpf is mapped out you'll be fine it will just be a normal TDI without the silly regen process :happy2:

Title: Re: Downpipe On TDI Engines
Post by: nezquick on March 05, 2012, 08:44:38 am

meant to say is it a mot failer to remove the dpf?

Title: Re: Downpipe On TDI Engines
Post by: 81lly on March 05, 2012, 10:07:05 am

I think the new rules regarding MOT state the dpf can't be removed, someone will correct me if am wrong

Title: Re: Downpipe On TDI Engines
Post by: PDT on March 05, 2012, 06:57:49 pm

Still no requirements for a DPF to be fitted for mot regulations.

Title: Re: Downpipe On TDI Engines
Post by: Andy on March 05, 2012, 08:22:45 pm

as long as it passes the smoke test it will be ok