Decat VW Polo 1.9TDi (74kw)

Should he decat his 1.9Tdi ?

Yes
37
93%
No
3
8%
 
Total votes: 40

User avatar
zniper
Enlisted
Posts: 36
Registered for: 15 years 3 months
Car Make: Audi
Car Model: 2008 Audi 2.0TDi Sportline
Membership No: missing

Decat VW Polo 1.9TDi (74kw)

Post by zniper »

Hi

I have a friend who wants to decat (remove catalytic converter) his 2006 Vw Polo 1.9TDi (highline - 74kw) , the car got 220000km on the clock and still no issues with the engine.

What is the pros and cons when doing this ?

anything else to look out for ?
User avatar
Neuk
Treasurer
Treasurer
Posts: 49805
Registered for: 18 years 4 months
Car Make: Volkswagen
Car Model: Touareg 3.0 V6 TDi R-Line
Membership No: 806
Location: Johannesburg

Re: Decat VW Polo 1.9TDi (74kw)

Post by Neuk »

At that mileage I would do it, should see EGT's drop and turbo spool up helped...
Current Garage:
Daily Drive: 2014 VW Touareg 3.0 V6 TDi R-Line
Project Fes: 1982 VW Golf GLS 1.5
Project FeO: 1966 VW Type 2 Transporter Kombi Split Window

Previous Garage:
Roxy: 2015 VW Golf R
Vagon: 2005 Audi B6 A4 1.8T (140kw) Avant
Project XXXX: 1967 VW Type 3 Variant (Squareback)
Project Betty: 2005 Polo 1.9 TDI (PD130) Sportline
Weekend Warrior: 1993 Volkswagen Caddy 2.0 16v ABF on ITB's
User avatar
ryanrich
Lieutenant-General
Posts: 8187
Registered for: 18 years 4 months
Car Make: Ford
Car Model: Territory
Membership No: missing
Location: Adelaide, Australia

Re: Decat VW Polo 1.9TDi (74kw)

Post by ryanrich »

Definitely! Flip, at that mileage that mofo must be clogged as heck. I did a de-cat on my A4 1.9 TDI at just over 100k on the clock and it made a nice difference to turbo spool up.
2016 Ford Territory TDCi Titanium AWD
2016 Kia Sportage Si
User avatar
zniper
Enlisted
Posts: 36
Registered for: 15 years 3 months
Car Make: Audi
Car Model: 2008 Audi 2.0TDi Sportline
Membership No: missing

Re: Decat VW Polo 1.9TDi (74kw)

Post by zniper »

no issues afterwards? engine lights? More noise ? more smoke ?
CTi
Cadet
Posts: 271
Registered for: 13 years 6 months

Re: Decat VW Polo 1.9TDi (74kw)

Post by CTi »

howzit man,

I wanted to start a thread about this very same thing some time back.. have a look at the Seat - Sport forum - there is an extensive thread about decatting on a diesel - unfortunately there is no definate answer to this! which is why my car still has the cat on.
92 CTi - EX
STO-Tuned Polo TDi 74kw - 122 bhp
CW Mk 5 GTi - Dp, Intake, Stealth Stage 2
194kw , 414Nm at Stealth HQ
User avatar
dazza
Field Marshal
Posts: 12139
Registered for: 16 years 2 months
Car Make: VW and VW
Car Model: Amarok and Citi Sport
Membership No: 1327
Location: Roodepoort

Re: Decat VW Polo 1.9TDi (74kw)

Post by dazza »

Most guys here with TDI's have decat without issues. The thread on the SEAT-SPORT forum has some guys saying you will kill turbo if you do it but in my mind you have more chance of damaging the turbo by not doing it at high mileage.
I had decat from 30000km I think on my IC TDI and had no issues till 77000km when it was sold and the car is still fine with new owner.
My friend did his 74kw TDI polo over a year ago and his is still 100%
Darryn Van Rooyen
Current: 17 Amarok V6 D/C 4Motion H/L Auto
Current: 1987 Citi Sport 1.6
Current: 91 Citi Sport 1.3
Current: 05 Kawasaki 200KDX, 16 KTM 300 EXC
Previous:
14 Amarok BITDI D/C 4Motion H/L Auto
12' MKVI GTI Manual
2009 Audi TT 2.0TFSI S-Tronic
2008 Honda CBX250 Twister - Crashed!
2011 Amarok BiTDI D/C Highline 4Motion
08 RS MKV GTI DSG
09 ZG Ibiza Cupra TDI
06 CW Sportline
01 Citi 1.4i
01 Yamaha YZ125
99 Toyota Tazz
94 Fox 1.8 Sport
User avatar
Deranged_9n3
Darth Vader
Posts: 5572
Registered for: 13 years 3 months
Car Make: VW
Car Model: Polo 1.9TDI Sportline
Membership No: 1639
Location: Montana Park
Contact:

Re: Decat VW Polo 1.9TDi (74kw)

Post by Deranged_9n3 »

My 96kw Sortline is decatted and Software loaded , my milleage is on 236 xxxkm's and no problems whatsoever !!!

I say take out R150 and decat ASAP
My Youtube Channel

Tiguan Track & Field 4Motion

20" Rotors l Airlift Performance l 63mm Downpipe and DPF Delete l PD-Tuning Software

Polo TDi RaceCar

GTB2260VZK l 76mm Stainless DP and FF l FMIC + Stainless Boost Pipes l Nitrous l PD-Tuning Software

GTB2260VZK
13.2 1/4mile @ ODI

Image
Loud 'n Low, Rollin' Coal
User avatar
Neuk
Treasurer
Treasurer
Posts: 49805
Registered for: 18 years 4 months
Car Make: Volkswagen
Car Model: Touareg 3.0 V6 TDi R-Line
Membership No: 806
Location: Johannesburg

Re: Decat VW Polo 1.9TDi (74kw)

Post by Neuk »

zniper wrote:no issues afterwards? engine lights? More noise ? more smoke ?
No issues whatsoever for me and there is little possibility of an engine light as the PD TDi engines have no lambda sensors. It is definitely a little noisier and you can hear the turbo spool but I didn't notice any more smoke...
Current Garage:
Daily Drive: 2014 VW Touareg 3.0 V6 TDi R-Line
Project Fes: 1982 VW Golf GLS 1.5
Project FeO: 1966 VW Type 2 Transporter Kombi Split Window

Previous Garage:
Roxy: 2015 VW Golf R
Vagon: 2005 Audi B6 A4 1.8T (140kw) Avant
Project XXXX: 1967 VW Type 3 Variant (Squareback)
Project Betty: 2005 Polo 1.9 TDI (PD130) Sportline
Weekend Warrior: 1993 Volkswagen Caddy 2.0 16v ABF on ITB's
User avatar
Tdi jetta 4 ever
Lieutenant-Colonel
Posts: 4089
Registered for: 13 years 5 months
Car Make: VW
Car Model: Jetta 4 1.9 Tdi, Isuzu2.5DKBLe
Membership No: missing
Location: Fochville

Re: Decat VW Polo 1.9TDi (74kw)

Post by Tdi jetta 4 ever »

Noe issues on my jetta as well. I've done a decat about 2 years ago and still no issues. I can hear a slight turbo whistle sound at idle when i stand at the exhaust.
Robin
Current rides: 02' Jetta 4 1.9 Tdi, 99' Isuzu KB 250 Dle(Faithfull aka slowmo) Mercedes Benz ML 270Cdi
Ex rides: 82' jetta 1.5 Gls(sold), 88' jetta Clx(sold with tears in my eyes)

Rather buy a good quality part that will last then buying a cheap part that won't last.


VCDS user with HEX-USB+CAN cable(Rosstech)

robinwisse@gmail.com
katotter
span die seile
Posts: 9830
Registered for: 12 years 4 months
Membership No: 1746

Re: Decat VW Polo 1.9TDi (74kw)

Post by katotter »

Noob here :hi:

What about on my 2.0l Petrol, worth it?
User avatar
N3mo
Lieutenant
Posts: 1330
Registered for: 13 years 8 months
Car Make: AUDI
Car Model: AUDI Q3 2.0TDI / TT 2.0TFSI
Membership No: missing
Location: KZN, Ballito

Re: Decat VW Polo 1.9TDi (74kw)

Post by N3mo »

i recently did my 74kw cross polo .. the difference was amazing, turbo spools up faster and car is much much smoother now..

also very weird is that the cross polo only has one box now, but the car isnt loud at all,, still sounds oem with a jet like sound from the rear,, i love it....

i got mine done for R250 ....
User avatar
MeanTdi
The Imposer Mod-whore-rator
Posts: 18554
Registered for: 18 years
Car Make: Subaru
Car Model: WRX
Membership No: 1153
Location: JHB

Re: Decat VW Polo 1.9TDi (74kw)

Post by MeanTdi »

I did mine a long time ago and no issues so far.

Mine cost me nothing as I unbolted the cat from the turbo and rest of the exhaust and bashed the cat material out and refitted the pipe back on.
Marco


Current: Subaru WRX
Ex: VW Polo 1.9 TDI Sportline
Ex: VW Golf VR6
Ex: VW Golf 1.8 GTi 16v


ALFAHOLIC wrote:What can go wrong, jarre you guys sound like you are describing an Alfa here...
My Corsa OPC wrote:Its not an oil leak, its just an Opel marking its territory :lol:
User avatar
MeanTdi
The Imposer Mod-whore-rator
Posts: 18554
Registered for: 18 years
Car Make: Subaru
Car Model: WRX
Membership No: 1153
Location: JHB

Re: Decat VW Polo 1.9TDi (74kw)

Post by MeanTdi »

Found this...

http://www.turboworks.co.za/gpage3.html

How to care for your turbo

In theory, a turbo is designed such that it will usually last as long as the engine. It does not require any special maintenance; and inspection is limited to a few periodic checks. However, to ensure that the turbo's lifetime is prolonged, the following engine manufacturer's service instructions must be strictly observed:

Oil change intervals
Correct oil as specified by engine manufacturer
Oil filter system maintenance
Always ensure correct oil-pressure is maintained
Air filter system maintenance
On diesel engines, use the best quality diesel available
Poor quality diesel will block the catalytic converter, which will lead to turbo failure
It is not uncommon to remove/replace blocked catalytic converters in order to prolong the life of the turbo

....
Never tamper with the vehicle’s Engine Control Unit (ECU) by “chipping” or “mapping” - your turbo is not designed for this (My edit :lol: )
Always ensure services are performed by a reputable mechanical workshop
Marco


Current: Subaru WRX
Ex: VW Polo 1.9 TDI Sportline
Ex: VW Golf VR6
Ex: VW Golf 1.8 GTi 16v


ALFAHOLIC wrote:What can go wrong, jarre you guys sound like you are describing an Alfa here...
My Corsa OPC wrote:Its not an oil leak, its just an Opel marking its territory :lol:
User avatar
Neuk
Treasurer
Treasurer
Posts: 49805
Registered for: 18 years 4 months
Car Make: Volkswagen
Car Model: Touareg 3.0 V6 TDi R-Line
Membership No: 806
Location: Johannesburg

Re: Decat VW Polo 1.9TDi (74kw)

Post by Neuk »

katotter wrote:What about on my 2.0l Petrol, worth it?
What do you want to get from it?
Current Garage:
Daily Drive: 2014 VW Touareg 3.0 V6 TDi R-Line
Project Fes: 1982 VW Golf GLS 1.5
Project FeO: 1966 VW Type 2 Transporter Kombi Split Window

Previous Garage:
Roxy: 2015 VW Golf R
Vagon: 2005 Audi B6 A4 1.8T (140kw) Avant
Project XXXX: 1967 VW Type 3 Variant (Squareback)
Project Betty: 2005 Polo 1.9 TDI (PD130) Sportline
Weekend Warrior: 1993 Volkswagen Caddy 2.0 16v ABF on ITB's
katotter
span die seile
Posts: 9830
Registered for: 12 years 4 months
Membership No: 1746

Re: Decat VW Polo 1.9TDi (74kw)

Post by katotter »

Neuk wrote:
katotter wrote:What about on my 2.0l Petrol, worth it?
What do you want to get from it?
Moar fukking power.
User avatar
Neuk
Treasurer
Treasurer
Posts: 49805
Registered for: 18 years 4 months
Car Make: Volkswagen
Car Model: Touareg 3.0 V6 TDi R-Line
Membership No: 806
Location: Johannesburg

Re: Decat VW Polo 1.9TDi (74kw)

Post by Neuk »

katotter wrote:
Neuk wrote:
katotter wrote:What about on my 2.0l Petrol, worth it?
What do you want to get from it?
Moar fukking power.
Sadly, no, maybe 2hp - 3 hp, I think that is what Joggie got...
Current Garage:
Daily Drive: 2014 VW Touareg 3.0 V6 TDi R-Line
Project Fes: 1982 VW Golf GLS 1.5
Project FeO: 1966 VW Type 2 Transporter Kombi Split Window

Previous Garage:
Roxy: 2015 VW Golf R
Vagon: 2005 Audi B6 A4 1.8T (140kw) Avant
Project XXXX: 1967 VW Type 3 Variant (Squareback)
Project Betty: 2005 Polo 1.9 TDI (PD130) Sportline
Weekend Warrior: 1993 Volkswagen Caddy 2.0 16v ABF on ITB's
katotter
span die seile
Posts: 9830
Registered for: 12 years 4 months
Membership No: 1746

Decat VW Polo 1.9TDi (74kw)

Post by katotter »

Any gain will be worth it, 85kw is getting old now.

Sent from my BlackBerry 9780 using Tapatalk
User avatar
dhirennaidoo
Cadet
Posts: 786
Registered for: 17 years 6 months
Car Make: VW
Car Model: 9n Polo Classic TDi (PD100)
Membership No: missing
Location: Johannesburg

Re: Decat VW Polo 1.9TDi (74kw)

Post by dhirennaidoo »

De-catted at around 110 000 km's. Car is on 147 000 now...no issues, don't expect any performance gains, just a slightly louder turbo whistle on occasion.
'08 350Z
'05 Polo Classic TDi (PD100)

Ex : '12 Mk6 GTi Ed35, '91 Fox 1.8, Honda CBR600F, '09 Honda CBX250 Twister
User avatar
B_rad
Major
Posts: 3866
Registered for: 12 years
Car Make: Ford
Car Model: Fiesta ST180
Membership No: 1835
Location: Gauteng

Re: Decat VW Polo 1.9TDi (74kw)

Post by B_rad »

I have a straight pipe right through. Very little difference to engine noise in the cabin, definitely noticeable from outside, but then again, the sound is awesome. Done many thousand km's and no issues! I felt better response from the car as well
User avatar
Barney
Lieutenant-General
Posts: 8941
Registered for: 12 years 7 months
Car Make: VW
Car Model: Mk3.5 Cabrio
Membership No: 1723
Location: Uranus

Re: Decat VW Polo 1.9TDi (74kw)

Post by Barney »

katotter wrote:Any gain will be worth it, 85kw is getting old now.
feel your pain... decat branch makes the engine respond better and rev faster thou you get more noise but not much go
User avatar
BIGMIG
Porra Love
Posts: 3226
Registered for: 14 years 1 month
Car Make: VW
Car Model: 9N3 GTB22/60vk Sportline
Membership No: 1574

Re: Decat VW Polo 1.9TDi (74kw)

Post by BIGMIG »

Who the hell voted no? Do it, like previously mentioned you could damage the turbo. but then you will bring down EGT's so in actual fact you will be helping it. Diesels don't like to run hot for a long time. Even with a full mufflerectomy I will give it horns for short bursts.
My NoPiel assassin

Goose, soot ninja
User avatar
B_rad
Major
Posts: 3866
Registered for: 12 years
Car Make: Ford
Car Model: Fiesta ST180
Membership No: 1835
Location: Gauteng

Re: Decat VW Polo 1.9TDi (74kw)

Post by B_rad »

dazza wrote:The thread on the SEAT-SPORT forum has some guys saying you will kill turbo if you do it
Just from a learning point of view, how can it damage the turbo? I don't know that much about turbo's but I'm struggling to see how?
User avatar
BIGMIG
Porra Love
Posts: 3226
Registered for: 14 years 1 month
Car Make: VW
Car Model: 9N3 GTB22/60vk Sportline
Membership No: 1574

Re: Decat VW Polo 1.9TDi (74kw)

Post by BIGMIG »

BradTDI wrote:
dazza wrote:The thread on the SEAT-SPORT forum has some guys saying you will kill turbo if you do it
Just from a learning point of view, how can it damage the turbo? I don't know that much about turbo's but I'm struggling to see how?
Over spooling.
My NoPiel assassin

Goose, soot ninja
User avatar
zniper
Enlisted
Posts: 36
Registered for: 15 years 3 months
Car Make: Audi
Car Model: 2008 Audi 2.0TDi Sportline
Membership No: missing

Re: Decat VW Polo 1.9TDi (74kw)

Post by zniper »

BIGMIG wrote:
BradTDI wrote:
dazza wrote:The thread on the SEAT-SPORT forum has some guys saying you will kill turbo if you do it
Just from a learning point of view, how can it damage the turbo? I don't know that much about turbo's but I'm struggling to see how?
Over spooling.
wont it go into limp mode once it overspools?

Thanks for all the Input guys !

:troll:
User avatar
Crawler
Lieutenant-General
Posts: 8553
Registered for: 18 years 10 months
Car Make: VW
Car Model: 9N3 Polo TDi
Membership No: 1358
Location: JHB
Contact:

Re: Decat VW Polo 1.9TDi (74kw)

Post by Crawler »

Do it
EX:
CW Polo TDi Sportline
| Cross Polo wheels | LED Numberplate - Interior - Park light | NeVaG & Maldino | Dimsport |
Post Reply