Antti O

So the problem is that i have mongoose 2.5" stainless steel exhaust system with 1 extra silencer (total 2 silencers) and still when i drive 90-100kmh in motorway (2500rpm), the noise is so loud that i have to use ear protectors. Car has all standard sound deadening, spare tire and original solid parcel shelf. Sound in the low speeds is not bad at all, problems start when i have fifth gear and over 2200rpm.
I drove 250kilometers in the weekend and got so bad headache that car stays in the garage until i have silent exhaust system.

ps. Exhaust must flow about 260bhp. I know this must be possible, imprezas etc do have over 300hp and silent exhausts.

My current setup:
Altough that 4" boyracer outlet has been removed and there is now 2.5" outlet in the exhaust.

http://3.bp.blogspot.com/_-EspJygF5l...1600-h/008.JPG

milesy23rst

iTrader: (16)

I always found out of the 3 (scorpion, mongoose and magnex )the magnex system with 3 inch tailpipe was quitest on idle and on boost, can you not get a company to make you one up??

Blunt.RS

iTrader: (7)

I know that feeling the horrible drown
am removing my 3" tail pipe and fitting a 4" with one of these apexi active tail silencer
been told by C&B you need to make a sleeve cause thier not made for 4"
but thier suppose to be very good with no power lose

Twins

iTrader: (18)

Standard system ?

Antti O

How restrictive it would be? I know it is silent

XR2

Hm... the Scorpion under my car is very loud. Especially in low gears. But the faster I drive the "quieter" it becomes. It's because the noise is behind you (most on the tailpipe) and you'll "loose" it when you drive faster. So on the motorway with low revs (less than 4k) it should be quiet enough to bear it for a long distance.

There are just two problems I could imagine:

1. You use an open induction system (K&N/Pipercross cone filter) and the car is producing too much noise under the bonnet. Had similar issues, use standard air filter box with standard silencer.
2. Your exhaust is producing a dead/droning sound which will kill your hearing on long distances. The cure is to use a different exhaust system or different silencers that will alter the sound.

orionmojo

iTrader: (1)

When i heatwrapped my system it changed the note of it completely. Maybe you could wrap it and see?

XR2

Maybe the wool inside the silencers is burned, so the exhaust gets louder and the sound note lower

Twins

iTrader: (18)

been told that they are ment to be pretty good ,got to be worth a try

studabear

my scorpion stainless back box, with afaik mild steel for the front and mid pipes is pretty quiet on the motorway cruising, full chat's a bit louder, and thats in a cabriolet

I've got a mongoose in the lock up ready to fit as its all stainless, hope I don't regret it

Blunt.RS

iTrader: (7)

Magnex on my on 3I cabbie fellla and its bloody awfull apart from tick over IMO
not sure if its cause its a rst one its louder or not

Chris69

go to a custom exhuast place and have you backbox more tightly packed or enlarged and packed further- best way imo.

Antti O

I had stock exhaust and put it to scrapper.. damn.
But i have to think options for next driving season ( next spring)
Here FI autumn pushs on.. only +5 and raining all the time.

zippyobrien

iTrader: (2)

had a 2.5 inch tail pipe mongoose system on a rs turbo and that was really quite tbh, with a airbox and kand n filter.

BAZRS2000

ive a 2.5" full stainless system on mine, the fella i bought it off said it was janspeed?but i didnt think they made rst exhausts...im convinced its a magnex, has 1 rear silencer and a 3.5" tailpipe tbh its pretty subtle esp on motorway speeds def not as loud as a mongoose...if u want quiet i would go with magnex

rsmark86

iTrader: (3)

i had a rs that used to spit flames and that car burnt out all the insides to the silencer and it was very bad and poped and banged all the time lol... but i changed for a new back box and it was lovely for a couple of thousand miles lol.

well not looking forward to the ear muffs as my s1 is nearly finished and running t34 and greys with scopian 4" back box and cosworth down pipe ect and airtech monster airfilter straight off the turbo ..... only joking i will love it lol