#1: How to de-cat a 1.1 Author: stg-joker, Location: buxton, norwichPosted: Sun Apr 15, 2012 12:31 pm ---- Heya there,
I know it won't make any difference on acceleration however im looking to de cat my car just for the sake of it... i already have a backbox and my car is straight through up to the cat....but i've been looking online and can't find a cat bypass for a 1.1 only the larger size engines, does anyone know how to de cat my car??
Thanks
#2: Re: How to de-cat a 1.1 Author: Addaz, Location: SuffolkPosted: Sun Apr 15, 2012 12:38 pm ---- Hammer + Chisel
Side note what year is your vehicle?
#3: Re: How to de-cat a 1.1 Author: stg-joker, Location: buxton, norwichPosted: Sun Apr 15, 2012 12:40 pm ---- its a Y reg so 2001
#4: Re: How to de-cat a 1.1 Author: Harry, Location: StaffordPosted: Sun Apr 15, 2012 12:40 pm ---- Buy my de cat pipe
#5: Re: How to de-cat a 1.1 Author: stg-joker, Location: buxton, norwichPosted: Sun Apr 15, 2012 12:41 pm ---- your's is for a 1.1?
#6: Re: How to de-cat a 1.1 Author: Harry, Location: StaffordPosted: Sun Apr 15, 2012 12:46 pm ---- If yours is an underfloor cat, as appose to a manifold cat it will work fine.
#7: Re: How to de-cat a 1.1 Author: stg-joker, Location: buxton, norwichPosted: Sun Apr 15, 2012 12:47 pm ---- how can i find that out mate? if its a manifold cat will i need a new manifold? if so which one?
#8: Re: How to de-cat a 1.1 Author: 138Andy, Location: NottsPosted: Sun Apr 15, 2012 12:49 pm ---- wouldnt bother on a 1.1 tbh :/
#9: Re: How to de-cat a 1.1 Author: Jay794, Location: Sheffield/Chesterfield/DronfieldPosted: Sun Apr 15, 2012 12:58 pm ---- It's a 1.1...
It's illegal...
It's a 1.1...
It won't do anything other than make the hamsters under the bonnet a wee bit louder...
It's just a metal pipe...
Did I mention it's illegal and it's a 1.1?
Why waste your money? Just colour code the bumpers or save up for a new car.....or an engine transplant
#10: Re: How to de-cat a 1.1 Author: Addaz, Location: SuffolkPosted: Sun Apr 15, 2012 1:11 pm ----
Jay794 wrote:
It's a 1.1...
It's illegal...
It's a 1.1...
It won't do anything other than make the hamsters under the bonnet a wee bit louder...
It's just a metal pipe...
Did I mention it's illegal and it's a 1.1?
Why waste your money? Just colour code the bumpers or save up for a new car.....or an engine transplant
Is it your car? No
Do we care about a trolls opinion? No
So how about STFU
01 will have a front mounted cat, just get a new manifold (4-2-1 or 4-1) and it will remove the cat
Just remember dont connect the second lamba sensor
Pm me if you need more details
#11: Re: How to de-cat a 1.1 Author: Lee, Location: EnglandPosted: Sun Apr 15, 2012 1:15 pm ---- Just refit it come MOT time, won't take long as it's a mani one
#12: Re: How to de-cat a 1.1 Author: anton1989, Location: west midlandsPosted: Sun Apr 15, 2012 1:39 pm ----
Addaz wrote:
Jay794 wrote:
It's a 1.1...
It's illegal...
It's a 1.1...
It won't do anything other than make the hamsters under the bonnet a wee bit louder...
It's just a metal pipe...
Did I mention it's illegal and it's a 1.1?
Why waste your money? Just colour code the bumpers or save up for a new car.....or an engine transplant
Is it your car? No
Do we care about a trolls opinion? No
So how about STFU
01 will have a front mounted cat, just get a new manifold (4-2-1 or 4-1) and it will remove the cat
Just remember dont connect the second lamba sensor
Pm me if you need more details
lol
but on a serious note is it worth it? i'm asking as mines a 1.1 also
#13: Re: How to de-cat a 1.1 Author: Addaz, Location: SuffolkPosted: Sun Apr 15, 2012 1:40 pm ---- If you want more noise, then yes
Gain wise you probably wont see anything but the throttle response may be improved
Yes you loose back pressure, which is pretty critical but are you going to be worried on a 1.1?
#14: Re: How to de-cat a 1.1 Author: JordGJ, Location: Leeds / West MidlandsPosted: Sun Apr 15, 2012 1:43 pm ----
Jay794 wrote:
It's a 1.1...
It's illegal...
It's a 1.1...
It won't do anything other than make the hamsters under the bonnet a wee bit louder...
It's just a metal pipe...
Did I mention it's illegal and it's a 1.1?
Why waste your money? Just colour code the bumpers or save up for a new car.....or an engine transplant
I'm with adam, I hate when people do this, as soon as anyone says how can i do X to my 1.1 people all pipe up saying its all pointless.
He said he knows it won't improve performance, maybe he wants it for sound or whatever, im sure he has his reasons, it's his car not yours so if you don't have anything constructive to add just don't bother posting?
#15: Re: How to de-cat a 1.1 Author: anton1989, Location: west midlandsPosted: Sun Apr 15, 2012 1:45 pm ----
JordGJ wrote:
Jay794 wrote:
It's a 1.1...
It's illegal...
It's a 1.1...
It won't do anything other than make the hamsters under the bonnet a wee bit louder...
It's just a metal pipe...
Did I mention it's illegal and it's a 1.1?
Why waste your money? Just colour code the bumpers or save up for a new car.....or an engine transplant
I'm with adam, I hate when people do this, as soon as anyone says how can i do X to my 1.1 people all pipe up saying its all pointless.
He said he knows it won't improve performance, maybe he wants it for sound or whatever, im sure he has his reasons, it's his car not yours so if you don't have anything constructive to add just don't bother posting?
#16: Re: How to de-cat a 1.1 Author: anton1989, Location: west midlandsPosted: Sun Apr 15, 2012 1:48 pm ----
JordGJ wrote:
Jay794 wrote:
It's a 1.1...
It's illegal...
It's a 1.1...
It won't do anything other than make the hamsters under the bonnet a wee bit louder...
It's just a metal pipe...
Did I mention it's illegal and it's a 1.1?
Why waste your money? Just colour code the bumpers or save up for a new car.....or an engine transplant
I'm with adam, I hate when people do this, as soon as anyone says how can i do X to my 1.1 people all pipe up saying its all pointless.
He said he knows it won't improve performance, maybe he wants it for sound or whatever, im sure he has his reasons, it's his car not yours so if you don't have anything constructive to add just don't bother posting?
off subject i found out what model my alloys where, and didn't need a halfords booklet turns out the cost well over a grand when they came out and are still going for £669 happy days.
#17: Re: How to de-cat a 1.1 Author: Andrew, Location: Black Country Ay IPosted: Sun Apr 15, 2012 1:54 pm ---- If he wants to do it to a budget, surely he could just go to a breakers yard and get a manifold and downpipe from a 1.1 that has an underfloor cat? In an ideal world it should match up to the rest of his exhaust
If he haggled and shopped around, with new gaskets it shouldnt cost a lot to DIY with the right tools.
This way he wouldn't have to hollow out the cat and it would be there to put back on when he needs to.
#18: Re: How to de-cat a 1.1 Author: Timon2210, Location: PalestinePosted: Sun Apr 15, 2012 1:58 pm ---- some ppl like to post just for the sake of posts counter..LOL,so can the car with the front CAT ,can be decat? or only the one is fitted down the car??
#19: Re: How to de-cat a 1.1 Author: Addaz, Location: SuffolkPosted: Sun Apr 15, 2012 2:11 pm ---- From experience you cant fit the different style TU exhaust manifold system as it catches on the filter housing (they change with the cat positioning)
Hence why the way to go is to get another cat and smash it to bits or to get a 4-2-1 manifold
BUT REMEMBER dont connect the second lamba sensor, as yes the EML light will be on but the vehicle will run fine
#20: Re: How to de-cat a 1.1 Author: Jay794, Location: Sheffield/Chesterfield/DronfieldPosted: Sun Apr 15, 2012 3:24 pm ---- Not trying to troll, but seriously, it's really not worth doing, plus it's illegal, you want noise? Drill a few holes in your airbox
#21: Re: How to de-cat a 1.1 Author: jimjam19927, Location: PortsmouthPosted: Sun Apr 15, 2012 3:28 pm ----
Jay794 wrote:
Not trying to troll, but seriously, it's really not worth doing, plus it's illegal, you want noise? Drill a few holes in your airbox
You have de-cat in your signature?! LOL
#22: Re: How to de-cat a 1.1 Author: Lee, Location: EnglandPosted: Sun Apr 15, 2012 3:43 pm ----
Jay794 wrote:
Not trying to troll, but seriously, it's really not worth doing, plus it's illegal, you want noise? Drill a few holes in your airbox
But you don't get the exhaust popping sound that way.
#23: Re: How to de-cat a 1.1 Author: Andrew, Location: Black Country Ay IPosted: Sun Apr 15, 2012 3:50 pm ---- Its his car he can do what he wants If he does it and finds that it was a waste of time, then its a lesson learned for him. If he likes it then who is anyone to judge so long as he is aware of the implications he has to work around?
Too many people say "not worth doing" because its a 1.1, 1.4 or what have you. But if you think of it like that, is it worth doing anything at all to these little french hatchbacks, or any car for that matter? I say you only live once and if something makes you happy, do it.
#24: Re: How to de-cat a 1.1 Author: L5_UKS, Location: West MidlandsPosted: Sun Apr 15, 2012 3:55 pm ---- Yeah as andrew says, Ignore the haters and go for it!
Mine will be getting a decat soon
#25: Re: How to de-cat a 1.1 Author: Lee, Location: EnglandPosted: Sun Apr 15, 2012 3:56 pm ---- Don't decat the 180, slows it down and causes it to go into limp mode a lot
#26: Re: How to de-cat a 1.1 Author: L5_UKS, Location: West MidlandsPosted: Sun Apr 15, 2012 3:58 pm ----
Lee wrote:
Don't decat the 180, slows it down and causes it to go into limp mode a lot
Even with a custom remap?
#27: Re: How to de-cat a 1.1 Author: Lee, Location: EnglandPosted: Sun Apr 15, 2012 3:59 pm ----
lukesaunders91 wrote:
Lee wrote:
Don't decat the 180, slows it down and causes it to go into limp mode a lot
Even with a custom remap?
Probably not as they should be able to map it out, but on the standard set up it causes problems. Same as when people fit shitting induction kits, as they don't realise they have removed the secondary air pump!
#28: Re: How to de-cat a 1.1 Author: L5_UKS, Location: West MidlandsPosted: Sun Apr 15, 2012 4:02 pm ---- Ah yeah well ill be getting a remap after its fitted so hopefully will be all good
They sound awesome after a decat IMO
Pretty sure I've seen someone on here decat his 180? someone from abroad?
#29: Re: How to de-cat a 1.1 Author: tomd0801754, Location: MoscowPosted: Sun Apr 15, 2012 4:18 pm ----
jimjam19927 wrote:
Jay794 wrote:
Not trying to troll, but seriously, it's really not worth doing, plus it's illegal, you want noise? Drill a few holes in your airbox
You have de-cat in your signature?! LOL
It's legal on a diesel. LOL.
#30: Re: How to de-cat a 1.1 Author: Andrew, Location: Black Country Ay IPosted: Sun Apr 15, 2012 4:24 pm ----
tomd0801754 wrote:
jimjam19927 wrote:
Jay794 wrote:
Not trying to troll, but seriously, it's really not worth doing, plus it's illegal, you want noise? Drill a few holes in your airbox
You have de-cat in your signature?! LOL
It's legal on a diesel. LOL.
Not any more, new rules say all cars that left the factory with a cat have to have one at MOT
#31: Re: How to de-cat a 1.1 Author: Rob2859, Location: HalifaxPosted: Sun Apr 15, 2012 5:11 pm ---- The pikey way is to take the CAT off and bash the insides out. Was thinking about doing it to mine as it will fail on emissions MOT time anyway so I might just got for a cheeky "special"
Regarding performance; It is actually more likely to noticeably improve performance over something with a bigger engine. The reason being there is less power to start with. For example; you are less likely to notice an extra 4 bhp on a 100 bhp car than you would bhp on a 60bhp car.
#32: Re: How to de-cat a 1.1 Author: stg-joker, Location: buxton, norwichPosted: Mon Apr 16, 2012 7:47 am ---- Thanks for all your help and for backing me up, its just something I wanna try for the fun of it, plus you learn from it don't you. I'm aware the performance won't increase but there's always that popping sound isn't there ;)!
I reckon i'll play it the pikey way and head down to the breakers yard and get one from a same car and gut it, then i can always keep mine for replacement when my MOT comes right?
Just to clarify my CAT is from the Manifold right? so when I goto the breakers yard what do i need to get?
many thanks.
#33: Re: How to de-cat a 1.1 Author: Big_Rich180, Posted: Mon Apr 16, 2012 7:53 am ----
Lee wrote:
Don't decat the 180, slows it down and causes it to go into limp mode a lot
It doesnt
It may lose a bit of torque but it doesnt go into limp mode.
#34: Re: How to de-cat a 1.1 Author: jimjam19927, Location: PortsmouthPosted: Mon Apr 16, 2012 7:54 am ----
Andrewxps wrote:
tomd0801754 wrote:
jimjam19927 wrote:
Jay794 wrote:
Not trying to troll, but seriously, it's really not worth doing, plus it's illegal, you want noise? Drill a few holes in your airbox
You have de-cat in your signature?! LOL
It's legal on a diesel. LOL.
Not any more, new rules say all cars that left the factory with a cat have to have one at MOT
LOL shhhhh
#35: Re: How to de-cat a 1.1 Author: Harry, Location: StaffordPosted: Mon Apr 16, 2012 8:19 am ----
stg-joker wrote:
Thanks for all your help and for backing me up, its just something I wanna try for the fun of it, plus you learn from it don't you. I'm aware the performance won't increase but there's always that popping sound isn't there ;)!
I reckon i'll play it the pikey way and head down to the breakers yard and get one from a same car and gut it, then i can always keep mine for replacement when my MOT comes right?
Just to clarify my CAT is from the Manifold right? so when I goto the breakers yard what do i need to get?
many thanks.
You need to check as it CAN be in the manifold or it CAN be under the car in the centre pipe it takes 30 seconds maximum to look.
If it's in the cat you need to get an aftermarket manifold, as addaz has said the oil filter housing is in the way so you can't just go and get a manifold from one that had the cat under the car.
If it's under the car, just get a centre pipe from a car that has it in the manifold and it will automatically de cat it.
#36: Re: How to de-cat a 1.1 Author: Jay794, Location: Sheffield/Chesterfield/DronfieldPosted: Mon Apr 16, 2012 12:28 pm ----
Andrewxps wrote:
tomd0801754 wrote:
jimjam19927 wrote:
Jay794 wrote:
Not trying to troll, but seriously, it's really not worth doing, plus it's illegal, you want noise? Drill a few holes in your airbox
You have de-cat in your signature?! LOL
It's legal on a diesel. LOL.
Not any more, new rules say all cars that left the factory with a cat have to have one at MOT
Really? Well mine been got through the MOT ok, when do/did these rules come in.
And yeah I have decat'd my car, as stated its a diesel, and it actually has some power under the bonnet
#37: Re: How to de-cat a 1.1 Author: Lecktorious, Location: ScotlandPosted: Mon Apr 16, 2012 12:48 pm ----
Jay794 wrote:
And yeah I have decat'd my car, as stated its a diesel, and it actually has some power under the bonnet
LOL.
#38: Re: How to de-cat a 1.1 Author: Mikey2uk, Location: StevenagePosted: Mon Apr 16, 2012 12:57 pm ----
Andrewxps wrote:
tomd0801754 wrote:
jimjam19927 wrote:
Jay794 wrote:
Not trying to troll, but seriously, it's really not worth doing, plus it's illegal, you want noise? Drill a few holes in your airbox
You have de-cat in your signature?! LOL
It's legal on a diesel. LOL.
Not any more, new rules say all cars that left the factory with a cat have to have one at MOT
Wrong that is only on Petrols, Diesels are fine.
#39: Re: How to de-cat a 1.1 Author: Addaz, Location: SuffolkPosted: Mon Apr 16, 2012 1:00 pm ----
Mikey2uk wrote:
Andrewxps wrote:
tomd0801754 wrote:
jimjam19927 wrote:
Jay794 wrote:
Not trying to troll, but seriously, it's really not worth doing, plus it's illegal, you want noise? Drill a few holes in your airbox
You have de-cat in your signature?! LOL
It's legal on a diesel. LOL.
Not any more, new rules say all cars that left the factory with a cat have to have one at MOT
Wrong that is only on Petrols, Diesels are fine.
AFAIK the MOT tester has to physically see a cat for an MOT for it to pass
Being a 2001 it will have a front manifold mounted cat
#40: Re: How to de-cat a 1.1 Author: Mikey2uk, Location: StevenagePosted: Mon Apr 16, 2012 1:01 pm ---- But diesel do not need one even under the new rules, it is only petrols
#41: Re: How to de-cat a 1.1 Author: Addaz, Location: SuffolkPosted: Mon Apr 16, 2012 1:02 pm ----
Mikey2uk wrote:
But diesel do not need one even under the new rules, it is only petrols
I will have to double check that as im not 100 percent
#42: Re: How to de-cat a 1.1 Author: Mikey2uk, Location: StevenagePosted: Mon Apr 16, 2012 1:04 pm ---- Seabrook posted it up a little while ago
#43: Re: How to de-cat a 1.1 Author: Andrew, Location: Black Country Ay IPosted: Mon Apr 16, 2012 1:27 pm ---- Maybe diesels might be fine, but the case about him decatting his 1.1 not being worth it has been stood up for and thats all I was concerned about
Could you imagine if every gti owner on here went about on every thread and said 'dont do it its not worth it because you have an inferior engine to me'? No, because this site would soon have no returning members
#44: Re: How to de-cat a 1.1 Author: Jay794, Location: Sheffield/Chesterfield/DronfieldPosted: Mon Apr 16, 2012 1:45 pm ----
Lecktorious wrote:
Jay794 wrote:
And yeah I have decat'd my car, as stated its a diesel, and it actually has some power under the bonnet
LOL.
I said "some" power, It's not exactly a lambo but it's fast enough....at least until I can afford a remap lol
#45: Re: How to de-cat a 1.1 Author: Mikey2uk, Location: StevenagePosted: Mon Apr 16, 2012 2:14 pm ----
Andrewxps wrote:
Maybe diesels might be fine, but the case about him decatting his 1.1 not being worth it has been stood up for and thats all I was concerned about
Could you imagine if every gti owner on here went about on every thread and said 'dont do it its not worth it because you have an inferior engine to me'? No, because this site would soon have no returning members
True it was uncalled for as its down to the OP with what he does to his car.
#46: Re: How to de-cat a 1.1 Author: Lee, Location: EnglandPosted: Mon Apr 16, 2012 2:40 pm ---- MOT hasn't changed for diesels with CATs, only with DPF.
If you have DPF, the casing needs to be there but the innards can be knocked out
#47: Re: How to de-cat a 1.1 Author: 138Andy, Location: NottsPosted: Sun Aug 12, 2012 8:11 pm ---- your going to look like a c*** making a pimped up 1.1 206, unless your planning on drag racing your grans mobility scooter
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turns out the cost well over a grand when they came out and are still going for £669 happy days.
If he does it and finds that it was a waste of time, then its a lesson learned for him. If he likes it then who is anyone to judge so long as he is aware of the implications he has to work around?
