Exhaust Experts

[Petrolsmasher]

Anyone got any previous experience or advice they could offer me. Engine in question is a 4 pot turbo - i know it will never sound good it just needs a bit more volume though as it is too quiet.

Currently got a branded system on which i could maybe sell second hand for 175/200.

another system will be about 600 including fitting so would cost me about 400.

Im hoping to maybe make the current system louder and not go through the hassle of trying to sell it.

Currenr system is 2.75 inch straight through from the standard cat to the backbox - backbox seems to supress a lot of noise as like i say its a pretty quiet system. Would removing the rear backbox be too loud even leaving the standard cat in place?

Or is it a viable option to keep all the pipework and swap out the backbox for a less baffled backbox?

My main concern is ending up with loads of resonance as it currently only has the backbox as the resonator. Would it make more to straight pipe the backbox and fit a resonator in the middle pipework?

[Rtig]

What car is it? Chances are unless it's something really obscure there will be plenty of videos on YouTube with various exhaust systems to compare noise.
Any good exhaust place will be able to change the back box for you.

[Weekendrebuild]

Just get rear back box deleted shouldn’t cost more than £80

[Chris32345]

Personally I wouldn't for two reasons
One you look an sound like a **** driving around
And 2 it should fail a mot for being louder then factory

[ging84]

maybe try drilling a hole in your windows and/or skull to let more noise in

[addz86]

What car is it? Some 4 pots sound decent with a louder exhaust, others just sound crap regardless.

[DaveH23]

Petrolsmasher said:

it is too quiet.

I wonder if there is a reason for that?

Petrolsmasher said:

i know it will never sound good.

and here we have the answer.

I'm not being arse as I also drive a 4 pot.

[DoubleD]

Chris32345 said:

And 2 it should fail a mot for being louder then factory

Are you sure about that?

[Weekendrebuild]

Totally wrong it won’t fail an MOT

[Digby]

One would assume those saying keep it quiet, also hate the sound of Spitfires and Lambo's...

[ecsrobin]

addz86 said:

What car is it? Some 4 pots sound decent with a louder exhaust, others just sound crap regardless.

I put my money on a mk7 Fiesta ST.

[AlexRS2782]

ecsrobin said:

addz86 said:

What car is it? Some 4 pots sound decent with a louder exhaust, others just sound crap regardless.

I put my money on a mk7 Fiesta ST.

Yep (quoted from a recent thread):

Petrolsmasher said:

I have a really strong urge to sell my mk7 fiesta st...

Edited by AlexRS2782 on Saturday 16th March 01:12

[speedking31]

Someone like Powerflow should be able to provide a suitable backbox within budget.

[KungFuPanda]

Digby said:

One would assume those saying keep it quiet, also hate the sound of Spitfires and Lambo's...

I'd rather listen to a factory Lambo with a standard exhaust than a four pot engine that has been fitted with an exhaust that's been fettled twice by two different garages.

[paintman]

Weekendrebuild said:

Totally wrong it won’t fail an MOT

"You must use your judgement to assess exhaust noise:

during the emissions test for the vehicle
rev the engine to around 2,500rpm or half the maximum engine speed if this is lower on vehicles not subject to an emissions test
Exhaust noise from the vehicle must not be unreasonably above the noise level you'd expect from a similar vehicle with a standard silencer in average condition.
DEFECT Exhaust noise levels in excess of those permitted
CATEGORY Major"
www.mot-testing.service.gov.uk/documents/manuals/c...

[anonymous-user]

It can't be too quite, up to the point that it is silent. Farting four pot hatchbacks with noisy exhausts are what give motoring enthusiasts a bad name

[DoubleD]

dme123 said:

It can't be too quite, up to the point that it is silent. Farting four pot hatchbacks with noisy exhausts are what give motoring enthusiasts a bad name

Idiot drivers give us enthusiasts/nerds/geeks/car bores a bad name. The actual car doesnt.

[nobrakes]

Young Luke, sounds like you already have a nice quick car.

£170 for your old exhaust? More like a tenner if you’re lucky.

You’d be better spunking your £600 quid on women.

[WJNB]

paintman said:

Exhaust noise from the vehicle must not be unreasonably above the noise level you'd expect from a similar vehicle with a standard silencer in

How pathetic as this relies on the judgement of a tester who could be hard of hearing or has very sensitive ears & bias against any form of exhaust modification intended to be louder than standard.

[WJNB]

Actually I used to like a sport noisy exhaust but now that I've grown up I prefer the quieter approach as I don't need to show-off or draw attention to myself or my car however lovely it might be.