View Full Version : Making a backbox louder
My standard OEM backbox on my Audi 80 is very quiet and I want it to be louder. The end which mounts to the rest of the system is a bit broken and will probably need replacing anyway come MOT time. So how am I able to make this louder for cheap without drilling holes in it? It's been suggested I burn the fibreglass stuff out of it by filling it with a bit of petrol. But I'm guessing this is a bit dangerous, what with the fumes burning in the enclosed confines of the box. I know we have a few bodger types on here who I reckon could help so ideas please...lol
mk1nova_rich
15-02-11, 08:50 PM
Why?
blue_peg_16v
15-02-11, 08:50 PM
chop the box out and replace with a lump of pipe for a proper bodge
MK1_Ben
15-02-11, 08:55 PM
It's been suggested I burn the fibreglass stuff out of it by filling it with a bit of petrol. But I'm guessing this is a bit dangerous, what with the fumes burning in the enclosed confines of the box.
When my Nova was overfueling quite alot, I backed off after a large burst of full throttle in turn making fuel collect in the center box (must have been only a small amount), this in an enclosed exhaust actually resulted in my center box blowing apart at the seams and across the road. I wouldn't try igniting Petrol in an Exhaust if I were you.
I've know people to cut the welds on a standard box, remove the wadding and re-weld it. Creates a very raspy tone though.
Why?
Because I like loud exhausts and don't want to spend any money on it! (seriously though - I've agreed to buy a 2nd hand stainless system which will arrive when the owner gets it off his motor but until then I just want to have a bit of cheap fun with the item which is effectively almost junk anyway lol)
MK1_Ben
15-02-11, 09:05 PM
Because I like loud exhausts and don't want to spend any money on it! (seriously though - I've agreed to buy a 2nd hand stainless system which will arrive when the owner gets it off his motor but until then I just want to have a bit of cheap fun with the item which is effectively almost junk anyway lol)
In that case cut it off at the Manifold and weld a scaffold pipe in its place. The McDonalds boys will LOVE it :)
1. lagging in silencers is 'rockwool' not glass fibre... it doesn't burn
2. a piece of scaffold is pretty much the worst pipe to use for an exhaust.......
3. why the hell do you want a loud exhaust?????
LEWI007
15-02-11, 09:14 PM
Cut the cat out and put a pipe in its place, then just put some aftermarket backbox.
Southie
15-02-11, 09:16 PM
Straight though, no backbox job job.
Buy a Ashley exhaust if your wanting something legal and loud-ish ;)
LEWI007
15-02-11, 09:18 PM
He doesnt want to spend anything he said hes got a stainless on the way.
Maybe just even drill a hole in the backbox pmsl lol
Southie
15-02-11, 09:21 PM
He doesnt want to spend anything he said hes got a stainless on the way
Stainless though won't make it necessarily louder, just makes them last longer (if proper stainless that is) ;)
stand aside
side exit cherry bomb...looks awsome....sounds awsome...job done. just fill the back bumper in first haha
http://a7.sphotos.ak.fbcdn.net/hphotos-ak-ash2/63682_10150116972922845_717137844_7782879_1426609_ n.jpg
http://a6.sphotos.ak.fbcdn.net/hphotos-ak-ash2/68288_10150116972832845_717137844_7782875_6547802_ n.jpg
Southie
15-02-11, 10:09 PM
I'm a :tard: and miss read the first post lol I've been thinking you fit a Audi backbox to a Nova lol What a fecking tosspot I am, apologies for my stupidity lol
Cut the cat out and put a pipe in its place, then just put some aftermarket backbox.
very hard on an 80 since the cat is around 10mm from a flange...i properly shagged my flange (oh yes i did) so now my exhaust is 2piece...manifold to backbox....and back box
If you want loud, just take the exhaust off completely lol
We shat a guy on a scooter right up when we took the Nova round to have the exhaust made up for the V6 :d
My standard OEM backbox on my Audi 80 is very quiet and I want it to be louder. The end which mounts to the rest of the system is a bit broken and will probably need replacing anyway come MOT time. So how am I able to make this louder for cheap without drilling holes in it? It's been suggested I burn the fibreglass stuff out of it by filling it with a bit of petrol. But I'm guessing this is a bit dangerous, what with the fumes burning in the enclosed confines of the box. I know we have a few bodger types on here who I reckon could help so ideas please...lol
i'd say open up the bonnet, and smash funk out the manifold with an axe, then she'll sound shweeeeeeeeet in you'll look even cooler than you sound guv:cry:
flat blade screwdriver and a hammer, bang some holes in the backbox, job done
i'd say open up the bonnet, and smash funk out the manifold with an axe, then she'll sound shweeeeeeeeet in you'll look even cooler than you sound guv:cry:
and take out the inlet manifold as well...
FAIL lol
Record yourself making exhaust noises on the bog one day on your phone,drive with earphones in playing your finest redlines,job done.That way,you can act like a total weapon and nobody will ever know.................
reevie1987
16-02-11, 07:20 PM
My standard OEM backbox on my Audi 80 is very quiet and I want it to be louder. The end which mounts to the rest of the system is a bit broken and will probably need replacing anyway come MOT time. So how am I able to make this louder for cheap without drilling holes in it? It's been suggested I burn the fibreglass stuff out of it by filling it with a bit of petrol. But I'm guessing this is a bit dangerous, what with the fumes burning in the enclosed confines of the box. I know we have a few bodger types on here who I reckon could help so ideas please...lol
i was the same with my corsa i cut the middle box out welded a straight through bit of pipe there then cut the backbox in half cut all the baffels out then welded it back up could you do that? so it was completely straight through and it was to loud set all the car alarms off going down the street but my chav days are over just a nicley toned backbox i would prefere now:thumb:
i was the same with my corsa i cut the middle box out welded a straight through bit of pipe there then cut the backbox in half cut all the baffels out then welded it back up could you do that? so it was completely straight through and it was to loud set all the car alarms off going down the street but my chav days are over just a nicley toned backbox i would prefere now:thumb:
This might be the way to go; I'm at the point where I just fancy having a bit of fun with a motor before it gets it's proper stainless on (which won't be a ridiculous 4" noisy thing) It won't be for Maccy D's krooze - I'm too busy marking my pupil's books and preparing for work the next day! Just thought it's something I could do to start my interest up in cars again for this year, while at the same time upskilling and getting a bit handier with a welder without spending too much cash. Is this too much to ask?!
I'm a :tard: and miss read the first post lol I've been thinking you fit a Audi backbox to a Nova lol What a fecking tosspot I am, apologies for my stupidity lol
No worries lol:thumb:
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