Modified my exhaust and sorted splutter!!!

**Johnny5** · Thursday 27th August 2009, 22:30

Looking and sounding good m8y

**cragmaz** · Thursday 27th August 2009, 22:56

Originally Posted by Johnny5

Looking and sounding good m8y

Thanks dude,

C

**S70T5Chris** · Friday 28th August 2009, 08:29

Thanks Crag, that does sound very nice mate

**Wombatbomb** · Friday 28th August 2009, 08:44

Originally Posted by 850 2.5 10v

You'll need your CAT on for your MOT and of course if you have removed it then remember to tell your insurance company!!

I've said it before - its only a matter of time before someone comes unstuck...

And I'll say it yet again, the presence of a CAT has FECK ALL to do with whether a car can pass an MOT, checking to see whether one is fitted to the vehicle is not part of the test.

The CAT is part of the construction and use regulations for vehicles, if your car was manufactured after a certain date (sometime in 1993 iirc) then it MUST be fitted with a CAT at all times. So, the time that you need a CAT fitted is not just for an MOT, you just have to pray that you never get a roadside VOSA check, because they can and have confiscated vehicles for not having the CAT fitted.

Your statement about telling your insurers is, frankly, beyond stupidity. By removing a CAT you have, in the eyes of the law, made your vehicle unroadworthy (hence why VOSA can impound it). If you look through your insurance terms you'll find that the policy will require that you keep the vehicle in a roadworthy condition. So, by ringing up and telling your insurance company that you have removed your CAT you are also telling them you have knowingly made your vehicle unroadworthy. All they will do is say thank you very much, perhaps charge you for the pleasure, and then make a note on your policy. So, roll on a period of time and you have an accident. You ring your insurer and try to make a claim, they look at the policy notes, see you've made the car unroadworthy, laugh at you and put the phone down.

**cherry1809** · Friday 28th August 2009, 19:21

Originally Posted by Wombatbomb

And I'll say it yet again, the presence of a CAT has FECK ALL to do with whether a car can pass an MOT, checking to see whether one is fitted to the vehicle is not part of the test.

The CAT is part of the construction and use regulations for vehicles, if your car was manufactured after a certain date (sometime in 1993 iirc) then it MUST be fitted with a CAT at all times. So, the time that you need a CAT fitted is not just for an MOT, you just have to pray that you never get a roadside VOSA check, because they can and have confiscated vehicles for not having the CAT fitted.

Your statement about telling your insurers is, frankly, beyond stupidity. By removing a CAT you have, in the eyes of the law, made your vehicle unroadworthy (hence why VOSA can impound it). If you look through your insurance terms you'll find that the policy will require that you keep the vehicle in a roadworthy condition. So, by ringing up and telling your insurance company that you have removed your CAT you are also telling them you have knowingly made your vehicle unroadworthy. All they will do is say thank you very much, perhaps charge you for the pleasure, and then make a note on your policy. So, roll on a period of time and you have an accident. You ring your insurer and try to make a claim, they look at the policy notes, see you've made the car unroadworthy, laugh at you and put the phone down.

LOL.
Spend out and buy a sports one.
Car sounds nice btw cragmaz.

**cragmaz** · Friday 28th August 2009, 20:00

Originally Posted by cherry1809

LOL.
Spend out and buy a sports one.
Car sounds nice btw cragmaz.

Thanx buddy!, was even thinkin of choppin out the remaining silencer, but dunno.

just nice for now.

C

**cragmaz** · Friday 28th August 2009, 20:16

short video of a blast to work this morning, exhaust sounds nice and rampant wheelspin on the damp roads, excellent fun!!!!!

http://s540.photobucket.com/albums/g...t=MOV00038.flv

C

**Johnny5** · Friday 28th August 2009, 20:28

Crag, be carefull if you are thinking of removing the rear silencer completley as it provides back pressure on the engine

**cragmaz** · Friday 28th August 2009, 23:08

Originally Posted by Johnny5

Crag, be carefull if you are thinking of removing the rear silencer completley as it provides back pressure on the engine

no backbox matey, just 1 centre one!!!!

C

**cherry1809** · Saturday 29th August 2009, 14:01

Originally Posted by Johnny5

Crag, be carefull if you are thinking of removing the rear silencer completley as it provides back pressure on the engine

As far as I'm aware, The turbo provides enough back pressure by itself.
Back pressure and crap exhausts only really applies to NA cars.

**cragmaz** · Monday 31st August 2009, 21:10

Originally Posted by cherry1809

As far as I'm aware, The turbo provides enough back pressure by itself.
Back pressure and crap exhausts only really applies to NA cars.

yeh, my mate had one some years ago, and he just had a straight thro pipe from turbo back, it sounded awesome poppin` and bangin` on overrun, very tempted haha!!!

C

**p fandango** · Monday 31st August 2009, 21:14

Originally Posted by Johnny5

Crag, be carefull if you are thinking of removing the rear silencer completley as it provides back pressure on the engine

you don't want back pressure on a turbo, thats why i've got a bypass valve

**cragmaz** · Monday 31st August 2009, 22:22

Originally Posted by p fandango

you don't want back pressure on a turbo, thats why i've got a bypass valve

how does that work then m8?

C

**p fandango** · Monday 31st August 2009, 22:28

Originally Posted by cragmaz

how does that work then m8?

its a motorised butterfly valve welded into the exhaust, flick the switch & it opens bypassing the CAT, silencer & all the piperwork

[ame]http://www.youtube.com/watch?v=_nf301F9S84[/ame]

**cragmaz** · Monday 31st August 2009, 22:48

Originally Posted by p fandango

its a motorised butterfly valve welded into the exhaust, flick the switch & it opens bypassing the CAT, silencer & all the piperwork

http://www.youtube.com/watch?v=_nf301F9S84

Wow!!!!, thats awesome, is it expensive to do, where do you get the parts from and does it provide any performance benefits?

C

**p fandango** · Monday 31st August 2009, 23:19

Originally Posted by cragmaz

Wow!!!!, thats awesome, is it expensive to do, where do you get the parts from and does it provide any performance benefits?

i got it from QTP & had to be imported from America, think it cost about £150ish quid, then the price of getting it fitted. Not done any back-to-back tests & not really used it much, but should help the turbo spool up quick

**woz** · Tuesday 1st September 2009, 00:02

Originally Posted by cragmaz

Hi all,

Been tinkering at the garage a..................... i drew a deep breath and removed the oval tailpiece, and chopped the silencer out,then butt welded a stainless length to the existing system ....
C

.

errhyemm I knows some on yer speaks with theirs, but how do you weld with your butt? Can you post vid of it on Youtube??

Cheers
Woz

**cragmaz** · Tuesday 1st September 2009, 00:37

Originally Posted by woz

.

errhyemm I knows some on yer speaks with theirs, but how do you weld with your butt? Can you post vid of it on Youtube??

Cheers
Woz

HaHa, thats almost as funny as your avatar picture!!!!!!

C

**cameron** · Friday 4th September 2009, 01:08

Shamooooaaaaaaan mother ££££er, lol

Car sounds mint Craig and goes like stink

**scripter** · Friday 4th September 2009, 18:43

havent looked at the cat on a volvo but had a cat on a calibra before and smashed the centre through and then put a straight peice of pipe through the centre making it decatted but still looking like an original cat not sure if this is poss on volvos but if you done it that way then if vosa pull u over u can plead igronance on it i suppose