Welcome to Just Commodores, a site specifically designed for all people who share the same passion as yourself.

New Posts Contact us

Just Commodores Forum Community

It takes just a moment to join our fantastic community

Register

Is it good to remove catalytic converters?

AirStrike

Well-Known Member
Joined
Jun 28, 2003
Messages
8,158
Reaction score
97
Points
48
Age
34
Location
Melbourne
Members Ride
91' VN SS
Only legal on pre 04 or something isn't it??

Cats are for girls. . . .
Or normal people. Remove them for an extra 3rwkw and extra mang.
 

Not_An_Abba_Fan

Exhaust Guru
Joined
Aug 18, 2006
Messages
13,907
Reaction score
482
Points
83
Location
Bunbury, WA
Members Ride
Strange Rover
The cats are only there to reduce emissions, nothing else. Not create back pressure or any other fairy tale.

The engine management system is designed around them being there. The car will run better, perform better and use less fuel without them, as long as it is tuned to suit.

Can you remove them? Sure. You will need to get the part of the tune that reads post cat sensors deleted though or you will be throwing all sorts of errors.

If it is illegal where you live, then it's totally up to you whether you run that risk or not. Here in Australia it is illegal to remove cats if they were fitted from factory. The reason we have cats in the first place is because pre cat emissions killed all the unicorns. Pretty sure all the people that have either removed their cats or smashed the guts out have made the Western Black Rhino extinct as well.
 

Kiddo

You're serious bro?!
Joined
May 21, 2011
Messages
1,681
Reaction score
5
Points
0
Location
Melbourne
Members Ride
Mitsubishi Colt
So, on a more important and interesting topic.

Have those Western Black Rhinos gone and gotten themselves wiped out?
 

Not_An_Abba_Fan

Exhaust Guru
Joined
Aug 18, 2006
Messages
13,907
Reaction score
482
Points
83
Location
Bunbury, WA
Members Ride
Strange Rover
Apparently, it has been declared extinct because the last official sighting of one was back in 2006.
 

Not_An_Abba_Fan

Exhaust Guru
Joined
Aug 18, 2006
Messages
13,907
Reaction score
482
Points
83
Location
Bunbury, WA
Members Ride
Strange Rover
Maybe they just moved east?


SCIENCE!
Probably. The only thing that distinguishes the Western Black from the ordinary Black is location. It is "believed" to be genetically different, but we'll never know now. If people are encroaching on an animals habitat, most of the time the animal moves.
 

Hussien

New Member
Joined
Jul 2, 2013
Messages
99
Reaction score
1
Points
0
Age
32
Location
Middle East.
Members Ride
VE v8 L98 6.0L
I heard removing them is good for fuel economy and engine breathing. Here if your car blows a huge black smoke , no one cares for environment even the police.

Well as the car is set up to have cats , probably not , you can get high flow cats fitted , which will keep it legal , actually , wouldn't a HSV already have high flow cats ??


Sent from my iPhone using Tapatalk
HSV doesn't have high flow cats.

No removing them would be bad for your engine

Cats make back pressure with is good and without them you can/will burn out your valves. Don't be cheap a buy hi-flows probably a 200cpi cat as 100cpi cats are illegal too

And no a HSV has the same flowing cats as a Holden 6L
Thanks.

Your car and its story changes every time you post on here. The car is the least of your problems when you can't tell the truth, can't help yourself, can't say thanks.
You think I made stories?

I have more than one car. All of them are Holden. I used to have 11 cars, but now I only have 3 cars.

What a stupid ####ing question. If you know it's illegal why would you even consider it.
Why do you want to remove them?


Man, it's just a question.

Check Engine light came on and I used my scanner tool and the code was P0420. I went to the dealer and they says "the catalytic converter is clogged and I need a new one". It's an expensive part, that's why I asked this stupid question.


as stated they are there for a reason,just get some hi-flow cats as removing them is detrimental to your car and the environment-lol

didn't think you could get hsv holden in new York-lol
Actually I don't live in United States. :smoking:


Doubt it, but anyway we'll humour you.

this should have been when you threw the idea out the window.

The system and car are designed to run cats - how much drone car one car have - 3 inch with no cats?

Buy some extractors ffs, you have a pov spec 3 inch cat-back and you want to make it sound worse?

Do a full system - it will make a difference, don't just rip bits off.
Why are you guys don't believe I own a HSV? Do you want me to prove that? I will make a video today.
 
Last edited:

mpower

Well-Known Member
Joined
Jan 22, 2007
Messages
3,820
Reaction score
612
Points
113
Location
Brisbane
Members Ride
V2 CV8 Monaro and VF SSV Redline
get the system done properly, stop being so damn cheap.

good extractors and a properly set-up system will outstrip your backyard job.
 

rx2_freak

Smokes, let's go.
Joined
Mar 22, 2009
Messages
320
Reaction score
5
Points
16
Location
Churchill
Members Ride
SSV Z SERIES SPORTWAGON
Man, it's just a question.

Check Engine light came on and I used my scanner tool and the code was P0420. I went to the dealer and they says "the catalytic converter is clogged and I need a new one". It's an expensive part, that's why I asked this stupid question.
And it was a pretty stupid one at that. Your car came with them what makes you think you'd be able to remove them.

You claim to own 3 cars, surely you can afford to do headers and cats on your HSV as opposed to just an all noise cat back. Cats are cheap if you're just replacing the standard POS.
 

Hussien

New Member
Joined
Jul 2, 2013
Messages
99
Reaction score
1
Points
0
Age
32
Location
Middle East.
Members Ride
VE v8 L98 6.0L
The cats are only there to reduce emissions, nothing else. Not create back pressure or any other fairy tale.

The engine management system is designed around them being there. The car will run better, perform better and use less fuel without them, as long as it is tuned to suit.

Can you remove them? Sure. You will need to get the part of the tune that reads post cat sensors deleted though or you will be throwing all sorts of errors.

If it is illegal where you live, then it's totally up to you whether you run that risk or not. Here in Australia it is illegal to remove cats if they were fitted from factory. The reason we have cats in the first place is because pre cat emissions killed all the unicorns. Pretty sure all the people that have either removed their cats or smashed the guts out have made the Western Black Rhino extinct as well.
it's legal where I live. I'm going to smashed the guts out, but the question is, do I really need to tune my engine?

Because where I live the Dyno tune places have a bad reputation. It's really cheap, but they damaged many engines as I heard because they don't have any experience. This car has 64,000 km on it, but the engine has been replaced. It's actually 28,000 km. so I'm a little afraid of tuning my engine.

Thanks bro.
 

Not_An_Abba_Fan

Exhaust Guru
Joined
Aug 18, 2006
Messages
13,907
Reaction score
482
Points
83
Location
Bunbury, WA
Members Ride
Strange Rover
You really only need to have the part of the tune that reads the sensors after the cats turned off. Otherwise, put up with the light and chimes when you start your car.
 

rx2_freak

Smokes, let's go.
Joined
Mar 22, 2009
Messages
320
Reaction score
5
Points
16
Location
Churchill
Members Ride
SSV Z SERIES SPORTWAGON
Hello,

I have a really simple question. I own a 2008 Ve Hsv LS2 and it has only 64,000 km on it. I just my installed XForce 3 inch Cat-Back System.

I would like to remove my catalytic converters. I know it's illegal to do that, but the question is

Would my engine breathe better than before when I remove the catalytic converters? Would the fuel economy be better or worst?

My car has two catalytic converters.

Thanks.
it's legal where I live. I'm going to smashed the guts out, but the question is, do I really need to tune my engine?

Because where I live the Dyno tune places have a bad reputation. It's really cheap, but they damaged many engines as I heard because they don't have any experience. This car has 64,000 km on it, but the engine has been replaced. It's actually 28,000 km. so I'm a little afraid of tuning my engine.

Thanks bro.
You've said to different things about cat removal, you need to figure out your BS story.

What country do you live in exactly.
 

Hussien

New Member
Joined
Jul 2, 2013
Messages
99
Reaction score
1
Points
0
Age
32
Location
Middle East.
Members Ride
VE v8 L98 6.0L
You've said to different things about cat removal, you need to figure out your BS story.

What country do you live in exactly.
When I said "I know it's illegal to do that" I mean it's illegal to do that in Australia.

it's legal where i live (Middle East, Oman).

I don't understand. Why are you so upset?
 

corhijasna

Member
Joined
Sep 28, 2013
Messages
681
Reaction score
14
Points
18
Age
47
Location
Portland Victoria
Members Ride
vz ss commodore / WM Caprice V
thought they were Chevrolets over there,if you want people to believe you maybe you should take a photo of your vehicle and post it here,then people might believe you more
the removal of cats won't give you much of a power gain,why don't you just buy a complete system and install it yourself,
 

commodore665

expat Saffa
Joined
Dec 30, 2011
Messages
2,766
Reaction score
1,662
Points
113
Age
50
Location
New Zealand via Cape Town
Members Ride
2005 SV6 & Alfa Romeo 156 V6
I heard removing them is good for fuel economy and engine breathing. Here if your car blows a huge black smoke , no one cares for environment even the police.



HSV doesn't have high flow cats.



Thanks.



You think I made stories?

I have more than one car. All of them are Holden. I used to have 11 cars, but now I only have 3 cars.







Man, it's just a question.

Check Engine light came on and I used my scanner tool and the code was P0420. I went to the dealer and they says "the catalytic converter is clogged and I need a new one". It's an expensive part, that's why I asked this stupid question.




Actually I don't live in United States. :smoking:


Then why does your location say New York ??

Why are you guys don't believe I own a HSV? Do you want me to prove that? I will make a video today.



Sent from my iPhone using Tapatalk
 

rx2_freak

Smokes, let's go.
Joined
Mar 22, 2009
Messages
320
Reaction score
5
Points
16
Location
Churchill
Members Ride
SSV Z SERIES SPORTWAGON
When I said "I know it's illegal to do that" I mean it's illegal to do that in Australia.

it's legal where i live (Middle East, Oman).

I don't understand. Why are you so upset?
People in australia know its illegal to remove them, know need to point it out. If its legal where you live why not just take it out and save us all the hassle of ripping in to you.
 

TI3VOM

Active Member
Joined
Feb 25, 2009
Messages
2,281
Reaction score
12
Points
38
Location
Here there and everywhere.
Members Ride
VT Commodore
When I said "I know it's illegal to do that" I mean it's illegal to do that in Australia.

it's legal where i live (Middle East, Oman).

I don't understand. Why are you so upset?
Another good old internet trolll.
I am laughing at how pathetic you are, anybody who needs to troll on the internet is just sad :(
 

ari666

250,000 hits
Joined
Mar 10, 2009
Messages
11,829
Reaction score
116
Points
63
Location
melbourne
Members Ride
1966 impala, R32 GTR
they sell x-force in oman?

anyway dont bash the guts out, itll drone as mentioned. get a proper length of mild steel tube to replace the cat which will make it sound normal.

there are noticable power gains to be had from an R32 GTR from a de-cat pipe. an NA commo i dunno about.
 
Top