Scandalous
Member
Registered: 23rd Jul 03
Location: Luton-Drives BMW 330Ci Coupe
User status: Offline
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Hi peeps
I have recently had my centre silencer out to give my powerflow back box a little more noise. I have just recently found out that my Cat is situated in my centre box, so my car now has no cat [its a 2004 1.4 16v SRi btw] The car is stupidly loud now and gives me a constant head ache. My car now pops alot too wen slowing down after acceleration, my mate told me this was called back firing and that it is not good for the car? Also my cars fuel consumption is now even worse than it was. Firstly ne1 no wat this backfiring is? and also wat should I do? Just buy a full new stainless system?
Cheers for ne help.
Wazza
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Corsa^Dan
Member
Registered: 4th Dec 02
Location: Sleaford, Lincolnshire
User status: Offline
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backfiring is only excess unburt fuel ligting in the pipe, not too much of a worry, and the popping aint a backfire as such, backfiring is a BANG, poping is just either small amounts of gas burning OR so mix ofs of air (complicated) i think or im getting confused
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Scandalous
Member
Registered: 23rd Jul 03
Location: Luton-Drives BMW 330Ci Coupe
User status: Offline
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cheers Dan for the reply. Just worried in case I fuk up my engine, my car has no silncer or cat, ne1 know if this could cause future probs with anything?
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Mediamaniac
Member
Registered: 3rd Apr 04
User status: Offline
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Won't pass an MOT.
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MODDEDCORSAGSI
Member
Registered: 9th Sep 03
Location: Stoke
User status: Offline
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i have no cat or centre section and mine pops like fuck, especially wen letting off in 1st gear at high revs, makes ppl jump i love it! 
oh and no it wont do any harm
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Scandalous
Member
Registered: 23rd Jul 03
Location: Luton-Drives BMW 330Ci Coupe
User status: Offline
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lol at moddedcorsa not too fussed about MOT car is 2 months old and only keeping it for 2 yrs max b4 upgrading.
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MODDEDCORSAGSI
Member
Registered: 9th Sep 03
Location: Stoke
User status: Offline
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and it dosnt mata if the MOT examiner is ya dad
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R Lee
Member
Registered: 15th Aug 03
User status: Offline
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the CAT is closer to the engine. not anywhere near the centre box???? 
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PainZ
Member
Registered: 28th Jun 02
Location: Camberley, Surrey - Drives a Black Vectra VXR Esta
User status: Offline
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correct,
the cat is straight after the exhaust manifold, you cant really see it unless you get RIGHT under the engine,
the big box you are looking at is just a huggggggeee centre silencer,
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R Lee
Member
Registered: 15th Aug 03
User status: Offline
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exactly...
weighs a fucking tonne
the reason why you're car is loud is because you've removed the biggest silencer. i replaced mine with a smaller one.
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Paul H
Member
Registered: 11th Aug 03
Location: Lincoln.
User status: Offline
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quote:
Originally posted by GoldPenguin
the CAT is closer to the engine. not anywhere near the centre box????
wrong only on 1.0 and 1.2 on the 1.4 it's the centre box
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R Lee
Member
Registered: 15th Aug 03
User status: Offline
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well then... bleugh 
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Paul H
Member
Registered: 11th Aug 03
Location: Lincoln.
User status: Offline
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you have the haynes manual it tells you in section 4B*9
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R Lee
Member
Registered: 15th Aug 03
User status: Offline
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it helps if i've read the fucker. haven't used it yet, its a last resort manual
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Paul H
Member
Registered: 11th Aug 03
Location: Lincoln.
User status: Offline
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same here but was looking the other day when i went to fit my backbox and noticed the 1.4 had the cat in the middle
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corsa-sxi
Member
Registered: 11th Jul 03
Location: Kingston upon Hull
User status: Offline
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hmm so ppl with removed centre boxs are fcuked then?
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PainZ
Member
Registered: 28th Jun 02
Location: Camberley, Surrey - Drives a Black Vectra VXR Esta
User status: Offline
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remove it,
just replace it with a smaller silencer,
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Russ
Member
Registered: 14th Mar 04
Location: Armchair
User status: Offline
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hmmm.. so if the cat is in the pipe, and no mot for 3 years... 
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Paul H
Member
Registered: 11th Aug 03
Location: Lincoln.
User status: Offline
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quote:
Originally posted by corsa-sxi
hmm so ppl with removed centre boxs are fcuked then?
only on 1.4. as said the 1.0 and 1.2 the cat is bolted to the manifold
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AndyCorsaC
Member
Registered: 22nd Sep 03
Location: Batley, West Yorkshire
User status: Offline
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so if i got my centre box removed and a straight thru pipe will it be ok for the mot i have a corsa c 1.0
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Paul H
Member
Registered: 11th Aug 03
Location: Lincoln.
User status: Offline
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yes mate your's will be ok
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AndyCorsaC
Member
Registered: 22nd Sep 03
Location: Batley, West Yorkshire
User status: Offline
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what will it sound like im possibly gettin a sebring 6x4 back box
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glasgow_corsa_c
Member
Registered: 13th Jan 03
Location: Ecosse
User status: Offline
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quote:
Originally posted by evzyboy
what will it sound like im possibly gettin a sebring 6x4 back box
willsound ok with a sebring/magnex etc../
its only if u get say a custom made backbox which is louder than off the shelf models.. then thats when u get the car sounding like a tractor.
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AndyCorsaC
Member
Registered: 22nd Sep 03
Location: Batley, West Yorkshire
User status: Offline
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ok then cause i was gonna go down the custom route but i have fallen in love with the sebring 6x4 so ill stick with that
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Red_SXi
Member
Registered: 23rd Sep 02
Location: Dunstable Drives: 52 Plate BMW 3 M Sport Coupe
User status: Offline
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I didn't realise your car was in your centre box waheed, on mine its infront of the manifold. You'll be ok tho i'd of thought, mine pops and stuff and my engine has been ok, just find a friendly MOT person when it comes to MOT time
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