Exhaust, work this out? - Saxperience

Dave_mckenzie · 27th December 2011, 16:07

Hiya

Bought a massive round back box to fill the hole on the back on me VTR. It came off a VTR MK1 (the lad who i bought it off claimed) so wouldnt fit mine. Had it cut and welded into place but the exhaust is SILENT!, theres gases coming out of it so i know its not blocked....i wanted a bit of a roar to me car and now its even quieter than before!

What can i do to give it that little bit more of a grunt!? i thought a massive exhaust would of!

Thanks

Dave

LSOfreak · 27th December 2011, 16:08

remove any silencer boxes and decat it

Karlb1 · 27th December 2011, 16:10

Straight through centre pipe to remove any silencers in there, then it'll be loud. But with a massive back box you won't see amuch performance gain if an, you'll just lose back pressure unless it's a decent brand.

Dave_mckenzie · 27th December 2011, 16:10

what do u mean remove silencer boxes? a friend of mine told me to pull the stuff out of the inside or fill with petrol and burn it out......the thing is, the lad who i bought it off said it was loud already!

Dave_mckenzie · 27th December 2011, 16:11

im not arsed about performance gains pal, the cars quick enough, just wanted it for a little nicer sound and to fill the bumper

Tom5190 · 27th December 2011, 16:13

Dont burn anything out of the silencer thats pikey as out.

Get a centre pipe for it that is straight through. is it a Mk1 vtr?

Karlb1 · 27th December 2011, 16:14

Dave_mckenzie · 27th December 2011, 16:14

no mate mk2

Dave_mckenzie · 27th December 2011, 16:15

Quote:

Originally Posted by Karlb1

Erm.....ok? lol......dont get it lol

Karlb1 · 27th December 2011, 16:17

Basically behind the bcak box there should be a long pipe under the middle of the car. This will have 2, maybe 3 boxes along it somewhere?

You need to buy a 'racetube' or 'straight through centre pipe' to get rid of these. This will eliminate any silencing in the exhaust and will result in a loud backbox.

Dave_mckenzie · 27th December 2011, 16:18

Ahh ok, so im assuming this is "decatting" my car yeah??

Are these expensive?

Karlb1 · 27th December 2011, 16:22

Not quite. a Decat is where you take the catlytic converter out of the car. Since yours is a MK2 vtr im assuming the cat is in the manifold, so getting a cetnre pipe wouldn't decat it, jsut take otu the silencers to give you a bit more noise.
http://www.kamracing.co.uk/citroen/c...ust-pipes.html These are the pipes in question. Choose one suitable for the year of your car and for your budget. you can buy one with a silencer in it, but since you just want noise that won't be the option for you.

Pitbull69 · 27th December 2011, 16:22

the cat is at the front of the car, a racetube is not a decat at all. you can get race tubes from about £50 new on ebay less if you look for second hand ones.

Dave_mckenzie · 27th December 2011, 16:26

so if i get one of these will i get any gain from it and will i need to worry come MOT time?

Karlb1 · 27th December 2011, 16:27

In theory you would gain performance everso slghtly, but not a lot, it will just make it louder since you have a dustbin as your backbox.
Nope MOT time should be okay in theory, it's when you decat the car you have to worry about MOTs.

saxoshaylor189 · 27th December 2011, 23:09

simple answer why there is no sound, if its quieter than before its too big for the engine size, de-cat will make it louder but if u wanna save your self a load of trouble just get a smaller box

col101 · 29th December 2011, 21:51

Quote:

Originally Posted by Karlb1

In theory you would gain performance everso slghtly, but not a lot, it will just make it louder since you have a dustbin as your backbox.
Nope MOT time should be okay in theory, it's when you decat the car you have to worry about MOTs.

Technically wrong - if the car has (for example) 3 silencers as std then it should always need 3 to pass the MOT. Having said that I've never failed one or had one of mine fail either. It would be the tightest tester in the world that'd fail a car for that

jeffchiz · 29th December 2011, 22:22

Quote:

Originally Posted by col101

Technically wrong - if the car has (for example) 3 silencers as std then it should always need 3 to pass the MOT. Having said that I've never failed one or had one of mine fail either. It would be the tightest tester in the world that'd fail a car for that

My mk2 failed mot on exhaust being too loud because neighbours were complaining about the volume so the tester had to stop the mot lol

MattCutts · 31st December 2011, 15:36

Quote:

Originally Posted by jeffchiz

My mk2 failed mot on exhaust being too loud because neighbours were complaining about the volume so the tester had to stop the mot lol

haha this made me laugh, i work in a MOT garage and when my boss MOTd my old 106 he had to wear ear defenders lol

marinemackay2003 · 31st December 2011, 16:36

just save up and buy a decent exhaust,

manufacturers spend thousands building and testing

should be some cheap second hand ones on the usual places