Decat a 1.9TDI should I?
- RJ8V
- Cadet
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Decat a 1.9TDI should I?
Hey guys,
Okay so as most of you know I'm driving a citi golf 1.4 carb.
But what none of you know is that my wife drives our safe/ long trip car.
A 2005 Polo 2door 1.9TDI 6speed (the one with the seperate headlight and spotlight)
Going to JHB for the weekend and was thinking of taking the car or rather her car for decat on Friday morning, seems pretty simple, just cut it off and fit a pipe.
But there's a reason why I'm driving the golfie and she the polo. Everything STOCK on her car and always fussy about mods.
So I want to know is it worth it to do the decat? what will the pros and cons be? I don't want to f#$K up something and have to stare into the eyes of a devil lol. Ony looking to do a decat as I heard of the pros but want to know the cons as well.
Just considering the decat as funds are a bit low for performance exhaust and blah blah.
Okay so as most of you know I'm driving a citi golf 1.4 carb.
But what none of you know is that my wife drives our safe/ long trip car.
A 2005 Polo 2door 1.9TDI 6speed (the one with the seperate headlight and spotlight)
Going to JHB for the weekend and was thinking of taking the car or rather her car for decat on Friday morning, seems pretty simple, just cut it off and fit a pipe.
But there's a reason why I'm driving the golfie and she the polo. Everything STOCK on her car and always fussy about mods.
So I want to know is it worth it to do the decat? what will the pros and cons be? I don't want to f#$K up something and have to stare into the eyes of a devil lol. Ony looking to do a decat as I heard of the pros but want to know the cons as well.
Just considering the decat as funds are a bit low for performance exhaust and blah blah.
EX: '02 AUDI A3 1.8 20V
EX: '81 Golf Rabbit Mk1, 2e 8V MP9. Not self-Build.
EX: '05 Ford Fiesta ST 2.0 Normal Aspirated
EX: '06 Volvo S60 D5
EX: '79 Golf MK1 2Door, 1.6i MP9. Not self-Build
EX: '05 Golf Chico 1.4 Carb - Self- Project
EX: '81 Golf Rabbit Mk1, 2e 8V MP9. Not self-Build.
EX: '05 Ford Fiesta ST 2.0 Normal Aspirated
EX: '06 Volvo S60 D5
EX: '79 Golf MK1 2Door, 1.6i MP9. Not self-Build
EX: '05 Golf Chico 1.4 Carb - Self- Project
- Shivbeanz
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Re: Decat a 1.9TDI should I?
Hey bud, I have the same car with a downpipe and no mufflers at all No problems so far, but from your post I see that's not what you're looking for.
A friend of mine did a decat (removed cat and welded pipe) on a 5 speed polo tdi, he noticed no sound difference, although his butt dyno registered a slightly quicker gain in low revs
Pro- no cat would mean less restriction on exhaust gases and help turbo life
Can't really think of any cons
Hope this helped
A friend of mine did a decat (removed cat and welded pipe) on a 5 speed polo tdi, he noticed no sound difference, although his butt dyno registered a slightly quicker gain in low revs
Pro- no cat would mean less restriction on exhaust gases and help turbo life
Can't really think of any cons
Hope this helped
(Oo=o=oO)
- RJ8V
- Cadet
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- Car Model: BT 50 3.2 SLE 4x2
- Location: Mpumalanga, Middelburg
Re: Decat a 1.9TDI should I?
Exactly the info I need, thanx Shivbeanz.
EX: '02 AUDI A3 1.8 20V
EX: '81 Golf Rabbit Mk1, 2e 8V MP9. Not self-Build.
EX: '05 Ford Fiesta ST 2.0 Normal Aspirated
EX: '06 Volvo S60 D5
EX: '79 Golf MK1 2Door, 1.6i MP9. Not self-Build
EX: '05 Golf Chico 1.4 Carb - Self- Project
EX: '81 Golf Rabbit Mk1, 2e 8V MP9. Not self-Build.
EX: '05 Ford Fiesta ST 2.0 Normal Aspirated
EX: '06 Volvo S60 D5
EX: '79 Golf MK1 2Door, 1.6i MP9. Not self-Build
EX: '05 Golf Chico 1.4 Carb - Self- Project
- panic-mechanic
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Re: Decat a 1.9TDI should I?
The only con is that it will fail an emissions test. Seeing we don't have that here.........
Stephan van Tonder - Jhb - Putfontein Benoni
'05 Audi A6 3.0L TDI Avant
'09 Touareg 3l TDI
'13 VW CC 2l tdi (repair project)
'05 Touareg v10
Perfect Power dealer. I do dyno tuning.
'05 Audi A6 3.0L TDI Avant
'09 Touareg 3l TDI
'13 VW CC 2l tdi (repair project)
'05 Touareg v10
Perfect Power dealer. I do dyno tuning.
- P1LAYA-ZN
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- THANAS
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Re: Decat a 1.9TDI should I?
Likely won't make any difference unless the cat is very blocked up from a turbo failing in the past, etc. My 200k km+ cat was perfectly fine, of course I only found that out after removing it. Also I'm not sure if the cat would even be functioning at all after that amount of time, so just remove it.
- stig
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Re: Decat a 1.9TDI should I?
Remove it one time. Reduces EGT's especially if it is bloked from the soot over the years
The Ride:
'09 Polo 1.9 TDi 96KW HighLine
Mods: Straight-flow FMIC ,Stainless boost piping, RKmotion tuned, 17" Audi A5 Reps, Cobra coilovers, SMF cutch kit
H&M Dyno Night: 114KW 429NM
Dubrun 2016 Autotrix Durban: 131KW 458NM Wulfchip Stage 2
Blackout 2017 Precision Race Dyno: 120kw and 450NM RK-motion Stage 2
'09 Polo 1.9 TDi 96KW HighLine
Mods: Straight-flow FMIC ,Stainless boost piping, RKmotion tuned, 17" Audi A5 Reps, Cobra coilovers, SMF cutch kit
H&M Dyno Night: 114KW 429NM
Dubrun 2016 Autotrix Durban: 131KW 458NM Wulfchip Stage 2
Blackout 2017 Precision Race Dyno: 120kw and 450NM RK-motion Stage 2
- RJ8V
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Re: Decat a 1.9TDI should I?
Stig, Panic and Thannas thanx! Seeing that the car has almost 230k on the clock, I think it must be blocked as hell so why not.
Was just affraid I might make a mistake but sure seems worth it.
Was just affraid I might make a mistake but sure seems worth it.
EX: '02 AUDI A3 1.8 20V
EX: '81 Golf Rabbit Mk1, 2e 8V MP9. Not self-Build.
EX: '05 Ford Fiesta ST 2.0 Normal Aspirated
EX: '06 Volvo S60 D5
EX: '79 Golf MK1 2Door, 1.6i MP9. Not self-Build
EX: '05 Golf Chico 1.4 Carb - Self- Project
EX: '81 Golf Rabbit Mk1, 2e 8V MP9. Not self-Build.
EX: '05 Ford Fiesta ST 2.0 Normal Aspirated
EX: '06 Volvo S60 D5
EX: '79 Golf MK1 2Door, 1.6i MP9. Not self-Build
EX: '05 Golf Chico 1.4 Carb - Self- Project
- Unobeat
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Re: Decat a 1.9TDI should I?
I have read many times here that removing it, has benefits for the turbo.
THANAS wrote:Mix them together to create Shellstrol, and then mix that with Winstrol to create the ultimate, maximum performance oil for your engine.
panic-mechanic wrote:When I build engines and do stuff like this I do it when there is nobody else around, No distractions, No phone nothing so that you don't forget what you should be doing. It's the little things that make them run right. Anybody can slap a basic bottom end together. that is the easy bit. It's all the little things that makes these builds a success or not.
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- Lieutenant
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Re: Decat a 1.9TDI should I?
pls update with info once removed..
was it blocked?, mileage?
differences if any?
was it blocked?, mileage?
differences if any?
Ex:
2007 Polo GTI
Eurodyne! 230WHP & 390NM @ KAR 2016 - without OB
2013 Honda Ballade Elegance
1996 Honda Ballade 150i
1994 Honda Ballade 150 Luxline
1991 Citi Golf 1.3
2009 Citi Rox 1.4i
2007 Polo 1.6 Comfortline
1989 Citi Sport 1.8
2007 Polo GTI
Eurodyne! 230WHP & 390NM @ KAR 2016 - without OB
2013 Honda Ballade Elegance
1996 Honda Ballade 150i
1994 Honda Ballade 150 Luxline
1991 Citi Golf 1.3
2009 Citi Rox 1.4i
2007 Polo 1.6 Comfortline
1989 Citi Sport 1.8
- Neuk
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Re: Decat a 1.9TDI should I?
Very strong Yoda feels due to thread subject.
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
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
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- Cadet
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Re: Decat a 1.9TDI should I?
I'm also very curious what the inside condition is after that mileage. Please let us know.
My cars: 2004 Nissan Almera 1.6
1977 Datsun 1200GX
(100% FULLY restored, 13" mags fitted)
Wife's car: 2019 Suzuki Ciaz
1977 Datsun 1200GX
(100% FULLY restored, 13" mags fitted)
Wife's car: 2019 Suzuki Ciaz
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- Lieutenant
- Posts: 1337
- Registered for: 15 years 6 months
- Location: GP
Re: Decat a 1.9TDI should I?
did u decat?
any feedback?
was the old cat blocked? mileage?
any feedback?
was the old cat blocked? mileage?
Ex:
2007 Polo GTI
Eurodyne! 230WHP & 390NM @ KAR 2016 - without OB
2013 Honda Ballade Elegance
1996 Honda Ballade 150i
1994 Honda Ballade 150 Luxline
1991 Citi Golf 1.3
2009 Citi Rox 1.4i
2007 Polo 1.6 Comfortline
1989 Citi Sport 1.8
2007 Polo GTI
Eurodyne! 230WHP & 390NM @ KAR 2016 - without OB
2013 Honda Ballade Elegance
1996 Honda Ballade 150i
1994 Honda Ballade 150 Luxline
1991 Citi Golf 1.3
2009 Citi Rox 1.4i
2007 Polo 1.6 Comfortline
1989 Citi Sport 1.8
- RJ8V
- Cadet
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- Location: Mpumalanga, Middelburg
Re: Decat a 1.9TDI should I?
Sorry guys the last couple of days was hectic.
Regarding the above since most of you are keen on the results, the best way I can describe is...
Upon removal of the cat, to be honest was quite stuffy and blocked, almost the same as opening the egr valve for the first time and all the gunk blocking leaving only a small gap for circulation.
Fitted a straight pipe where the cat was and I did infact saw and felt a difference.
When on full throttle she smokes a bit more than before since there is no filter and only straight rush to the exhaust.
I felt boost kicking in earlier than usual, noticed around 1200rpm where it normally was at 1500.
Stock dump valve can actually be heard now. When idling and just tapping the throttle, if you stand behind her she purrrs, or in this case low whistle.
Anyway havent notice anything else or if fuel consumptipn made a difference but personally think it was worth it.
Regarding the above since most of you are keen on the results, the best way I can describe is...
Upon removal of the cat, to be honest was quite stuffy and blocked, almost the same as opening the egr valve for the first time and all the gunk blocking leaving only a small gap for circulation.
Fitted a straight pipe where the cat was and I did infact saw and felt a difference.
When on full throttle she smokes a bit more than before since there is no filter and only straight rush to the exhaust.
I felt boost kicking in earlier than usual, noticed around 1200rpm where it normally was at 1500.
Stock dump valve can actually be heard now. When idling and just tapping the throttle, if you stand behind her she purrrs, or in this case low whistle.
Anyway havent notice anything else or if fuel consumptipn made a difference but personally think it was worth it.
EX: '02 AUDI A3 1.8 20V
EX: '81 Golf Rabbit Mk1, 2e 8V MP9. Not self-Build.
EX: '05 Ford Fiesta ST 2.0 Normal Aspirated
EX: '06 Volvo S60 D5
EX: '79 Golf MK1 2Door, 1.6i MP9. Not self-Build
EX: '05 Golf Chico 1.4 Carb - Self- Project
EX: '81 Golf Rabbit Mk1, 2e 8V MP9. Not self-Build.
EX: '05 Ford Fiesta ST 2.0 Normal Aspirated
EX: '06 Volvo S60 D5
EX: '79 Golf MK1 2Door, 1.6i MP9. Not self-Build
EX: '05 Golf Chico 1.4 Carb - Self- Project
- MeanTdi
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Re: Decat a 1.9TDI should I?
Yes the turbo will spool up sooner and feel like less lag. Most importantly you are getting the hot gasses away from the turbo more easily now to prolong its life.RJ8V wrote: I felt boost kicking in earlier than usual, noticed around 1200rpm where it normally was at 1500.
Stock dump valve can actually be heard now.
P.s. no dump valve on a TDI. That sound is the turbo vanes slowing down.
Marco
Current: Subaru WRX
Ex: VW Polo 1.9 TDI Sportline
Ex: VW Golf VR6
Ex: VW Golf 1.8 GTi 16v
Current: Subaru WRX
Ex: VW Polo 1.9 TDI Sportline
Ex: VW Golf VR6
Ex: VW Golf 1.8 GTi 16v
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- Lieutenant
- Posts: 1337
- Registered for: 15 years 6 months
- Location: GP
Re: Decat a 1.9TDI should I?
thanks for the update, something i need to maybe do..
Ex:
2007 Polo GTI
Eurodyne! 230WHP & 390NM @ KAR 2016 - without OB
2013 Honda Ballade Elegance
1996 Honda Ballade 150i
1994 Honda Ballade 150 Luxline
1991 Citi Golf 1.3
2009 Citi Rox 1.4i
2007 Polo 1.6 Comfortline
1989 Citi Sport 1.8
2007 Polo GTI
Eurodyne! 230WHP & 390NM @ KAR 2016 - without OB
2013 Honda Ballade Elegance
1996 Honda Ballade 150i
1994 Honda Ballade 150 Luxline
1991 Citi Golf 1.3
2009 Citi Rox 1.4i
2007 Polo 1.6 Comfortline
1989 Citi Sport 1.8
- Tman21
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Re: Decat a 1.9TDI should I?
Definitely only for emissions and not the health of your car.
On the Diesels, decat, straight pipe and EGR blank off is the way to go.
On the Diesels, decat, straight pipe and EGR blank off is the way to go.
Success: When hard work meets opportunity
#TMAN21
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Re: Decat a 1.9TDI should I?
Anyone knows the cost of a decat? Will sensors be removed? Wil air fuel mixture be negatively affected?
- stig
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Re: Decat a 1.9TDI should I?
1.9tdi has no sensors in the exhaust. Decat is R300 depending whereTswerie wrote:Anyone knows the cost of a decat? Will sensors be removed? Wil air fuel mixture be negatively affected?
Sent from my E6653 using Tapatalk
The Ride:
'09 Polo 1.9 TDi 96KW HighLine
Mods: Straight-flow FMIC ,Stainless boost piping, RKmotion tuned, 17" Audi A5 Reps, Cobra coilovers, SMF cutch kit
H&M Dyno Night: 114KW 429NM
Dubrun 2016 Autotrix Durban: 131KW 458NM Wulfchip Stage 2
Blackout 2017 Precision Race Dyno: 120kw and 450NM RK-motion Stage 2
'09 Polo 1.9 TDi 96KW HighLine
Mods: Straight-flow FMIC ,Stainless boost piping, RKmotion tuned, 17" Audi A5 Reps, Cobra coilovers, SMF cutch kit
H&M Dyno Night: 114KW 429NM
Dubrun 2016 Autotrix Durban: 131KW 458NM Wulfchip Stage 2
Blackout 2017 Precision Race Dyno: 120kw and 450NM RK-motion Stage 2
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- Enlisted
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Re: Decat a 1.9TDI should I?
Thanks, can you recommend anyone in the Gauteng area?
- stig
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- Car Model: Polo 1.9 TDi Highline 96KW
- Membership No: 2083
- Location: South Africa
Re: Decat a 1.9TDI should I?
Im not from GP so unfortunately not, vut its not rocket science on the 1.9tdi polo. Any exhaust shop should be able to helpTswerie wrote:Thanks, can you recommend anyone in the Gauteng area?
Sent from my E6653 using Tapatalk
The Ride:
'09 Polo 1.9 TDi 96KW HighLine
Mods: Straight-flow FMIC ,Stainless boost piping, RKmotion tuned, 17" Audi A5 Reps, Cobra coilovers, SMF cutch kit
H&M Dyno Night: 114KW 429NM
Dubrun 2016 Autotrix Durban: 131KW 458NM Wulfchip Stage 2
Blackout 2017 Precision Race Dyno: 120kw and 450NM RK-motion Stage 2
'09 Polo 1.9 TDi 96KW HighLine
Mods: Straight-flow FMIC ,Stainless boost piping, RKmotion tuned, 17" Audi A5 Reps, Cobra coilovers, SMF cutch kit
H&M Dyno Night: 114KW 429NM
Dubrun 2016 Autotrix Durban: 131KW 458NM Wulfchip Stage 2
Blackout 2017 Precision Race Dyno: 120kw and 450NM RK-motion Stage 2