Minty_Fresh
Member
Registered: 1st May 08
Location: westmidlands
User status: Offline
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do i need a backbox on my car...
not asin take it off so the exhaust ends at the rear beam.., but not have a backbox and just have the exhaust all the way back with a tailpipe on the end if you know what i mean..
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Corsa_Sport21
Member
Registered: 13th Apr 08
Location: Leven, Fife. Drives : 205 GTi
User status: Offline
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Yes but without a middle box itl be very loud.
My old Pulsar had a turbo back mongoose system with only 1 middle box and no rear box.Just the way the system is designed.
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Colin
Member
Registered: 4th Apr 02
User status: Offline
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Might loose some power, the backbox aids giving a back pressure r something, making the engine run right.
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Minty_Fresh
Member
Registered: 1st May 08
Location: westmidlands
User status: Offline
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cheers for that guys..
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neil h
Member
Registered: 28th Sep 06
User status: Offline
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IIRC the back pressure thing is an urban myth and only really true on turbo'd cars where you need the back pressure to prevent the turbo over spooling.
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Minty_Fresh
Member
Registered: 1st May 08
Location: westmidlands
User status: Offline
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its a 1.0 12v anyway..
but ive heard that they do need backpressure to run right..
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Matt L
Member
Registered: 17th Apr 06
User status: Offline
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yeh you can go with no back box and just the tip quite a few people on scn have done it with tdi cars just to get the noise. does affect perfomance though
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Minty_Fresh
Member
Registered: 1st May 08
Location: westmidlands
User status: Offline
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im not doing it for the noise or performance..
just want to get rid of the backbox so i can lower it even more..
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ed
Member
Registered: 10th Sep 03
User status: Offline
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Back pressure is a load of bollocks, well, unless you have a two stroke engine which has no valves so needs it. Don't need it on a turbo engine and don't need it on a normaly aspirated engine either.
I wouldn't run a car with no back box though, unless it was a specific exhaust design. It would be really loud and probably sound like a fart.
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ed
Member
Registered: 10th Sep 03
User status: Offline
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You can get different shaped back boxes that will allow you to lower the car more if you like. But if you're going that low you're going to mess up the handling like crazy.
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FruitBooTeR
Member
Registered: 18th Jan 07
Location: Wolverhampton Drives: S15
User status: Offline
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What backbox you got on standard?
Go for an aftermarket one, the backbox should clear rear beam completly anyway, its the actualy exhaust pipe that will hit off it when lowerd to the extreme, but this can also be modified to clear it 
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Minty_Fresh
Member
Registered: 1st May 08
Location: westmidlands
User status: Offline
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ive got a 6x4 backbox..
the tailpipe design is fine its just the size of the backbox itself that sits low...
clears the rear beam fine...
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GT190
Member
Registered: 6th Dec 07
Location: Greater London
User status: Offline
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get a smaller backbox, mine is long and thin.
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S@M
Member
Registered: 3rd Oct 07
Location: East Yorkshire
User status: Offline
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quote:
Originally posted by GT190
get a smaller backbox, my penis is long and thin.
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Minty_Fresh
Member
Registered: 1st May 08
Location: westmidlands
User status: Offline
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lol..
i would just buy a cheap 2nd hand backbox if the backbox was small so i could weld the tailpipe ive got into it...
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GT190
Member
Registered: 6th Dec 07
Location: Greater London
User status: Offline
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im getting my tiny center silencer cut out 2mro to straight through my exhuast.
you could use that?
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Corsa_Sport21
Member
Registered: 13th Apr 08
Location: Leven, Fife. Drives : 205 GTi
User status: Offline
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Yep this back pressure causing a car too loose power is bull.
My old pulsar without a backbox made 313bhp at 17psi.
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