Red_SXi
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Registered: 23rd Sep 02
Location: Dunstable Drives: 52 Plate BMW 3 M Sport Coupe
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Someone told me today that it decreases back pressure and could loose me BHP. What do you think?
I'm getting my centre box cut out, and replaced by a straight through pipe
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Tom N
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Registered: 4th Jun 03
Location: Bradford/Sheff (Uni) Drives: Golf GTI
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i have had this done and i haven't noticed a loss in power. trust me i would notice if i lost one of my precious 56! it pops nicely when you back off the accelerator 2
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R Lee
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Registered: 15th Aug 03
User status: Offline
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so many of us are in the same boat. 1.2's, who cares if it loses BHP its not as if we would actually gain anything in the first place.
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
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Go for a sebring centre section mate, seem to remember you've got a sebring backbox??
Have the XT1 and sound pipe on mine, no loss in power, actually seems to pick up better now...
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Fraser Young
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Registered: 26th Dec 02
Location: Dundee City Drives: 58 Impreza WRX
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Centre section made mine more responsive...
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corsa_x_15
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Registered: 28th May 01
Location: !!! LuToN !!!
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would it pass the M.O.T without the centre box ??
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
User status: Offline
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quote:
Originally posted by corsa_x_15
would it pass the M.O.T without the centre box ??
yes. 
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Daimo B
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Registered: 20th Mar 00
User status: Offline
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Depends on the bore size tbh. On a standard engine it wont really do it any favours. I've got a straight thru system, but to keep back pressure i kept the bore to 2", and thats on a 2.0 16v!
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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 sell Sebring, and they don't make the centre section for Corsa C's yet, hense why i'm doing this. I am changing my twin circle for a single oval.
Corsa Ash, do you have any pics of your XT1? Is it corsa C?
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Red_SXi
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Registered: 23rd Sep 02
Location: Dunstable Drives: 52 Plate BMW 3 M Sport Coupe
User status: Offline
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I'll be keeping the same bore, as the pipes up to the centre box were
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corsa_x_15
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Registered: 28th May 01
Location: !!! LuToN !!!
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how much would sumwhere charge to do this ??
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R Lee
Member
Registered: 15th Aug 03
User status: Offline
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powerflow wouldn't charge that much tbh.
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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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Poewrflow in St Albans wanted £120. My mate at a tyre fit place is doing it for about £20. All they do it cut and put a bit of straight pipe in, then clamp it at the ends
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M4tt
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Registered: 18th Apr 03
Location: Potters Bar
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if n e thing it would lose a bit of low down torque and gain a bit of power at the top end of the rev range 
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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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Looks like its going to be nothing serious then  I don't wanna loose any of my little power. I know the Sxi's aren't fast, but they aint actually that bad.
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AdiSRI
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Registered: 1st May 02
Location: Berkshire
User status: Offline
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i personally wudnt get a tyre place to fit a bit of mil steel pipe to a mild steel centre, if your gonna do it get it done properly and get a stainless centre pipe.
Dont get powerflow as they use crap grade stainless in the pipework, go to longlife there work is top notch.
http://www.exhausts.uk.com
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M4tt
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Registered: 18th Apr 03
Location: Potters Bar
User status: Offline
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quote:
Originally posted by Red_Sxi
Looks like its going to be nothing serious then I don't wanna loose any of my little power. I know the Sxi's aren't fast, but they aint actually that bad.
my bro has a Sxi like yours and i was well impressed with how nippy it is.
it used to keep up ok with my 1.4 16v on twisty back roads.
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corsa-sxi
Member
Registered: 11th Jul 03
Location: Kingston upon Hull
User status: Offline
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i thought back pressure is good? cos on the PVD description of the remus back box says it reduces back pressure by 85% resulting in 5% power gain 
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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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Every exhaust has back pressure, its how much its got, and how much it gains or looses when u fit new exhausts to the car
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Rob H
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Registered: 28th Oct 00
Location: Staffordshire Drives: Astra SRi
User status: Offline
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quote:
Originally posted by M4tt
if n e thing it would lose a bit of low down torque and gain a bit of power at the top end of the rev range
Indeed. By reducing back pressure, you allow the gasses to flow more freely, meaning an increase in torque/BHP at high revs, but a reduction at low revs. TBH its not going to be that noticable powerwise really, so you might aswell go ahead with it. Should sound nice though, which is what really matters  .
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CorsAsh
Member
Registered: 19th Apr 02
Location: Munich
User status: Offline
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quote:
Originally posted by Red_Sxi
Poewrflow in St Albans wanted £120. My mate at a tyre fit place is doing it for about £20. All they do it cut and put a bit of straight pipe in, then clamp it at the ends
Can't you get sebring stuff at trade prices? Why not get the proper job, comes with hangers and everything, is stainless steel, so is much better all round... Think it was only 40 quid when I got mine, perfect fit...
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AdiSRI
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Registered: 1st May 02
Location: Berkshire
User status: Offline
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quote:
Originally posted by CorsAsh
Can't you get sebring stuff at trade prices? Why not get the proper job, comes with hangers and everything, is stainless steel, so is much better all round... Think it was only 40 quid when I got mine, perfect fit...
He's already said that Sebring dont make a straight thru centre for the corsa c yet!
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
User status: Offline
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Oh yeah... ignore last post then! Sorry guys...
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wai_sxi
Member
Registered: 2nd Oct 02
Location: gloucester
User status: Offline
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red_sxi why dont u speak to chris uk, he has removed the centre section he said it sounds sweet!!! i went to powerflow to have the centre section removed and they was goin to charge me 130 quid i dont get it a de cat only costs 50 quid!! i was goin to hack saw the centre section out myself and replace it wiv a pipe hehe but il probaly fcuk it up!!!
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R Lee
Member
Registered: 15th Aug 03
User status: Offline
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why does my local powerflow charge a lot less than what you peeps have been quoted??? im sure mine would do it for under 100 easily
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