Exhaust back box

[silverhorse]

Got a little blow on the top of the back box about the size of a 50 pence piece. Could easily jollop it up or get a plate welded on, but the annoying thing is that it actually sounds good at idle and when you give it the beans.
Which leads me to thinking about a performance replacement.
I know some of you have these so am after a bit of advice really.

Car is 2005 2.4 V70 T5 and I am after subtlety not like a boy racer. Menacing at idle and a nice growl under load but I have to carry the wife, so must be fairly quiet at gentle driving.

Any suggestions???

Cheers
Paul

[M-R-P]

Watching with interest...

[V70 Graham]

Watching with interest...

Er, why......you have a Starlet :wave23d:

[M-R-P]

Er, why......you have a Starlet :wave23d:

And you have a dirty Vag :D

[V70 Graham]

And you have a dirty Vag :D

You are of course correct Mr P, but you are forgetting 1 small detail.....I can drive 'our' Volvo whenever I want :nutkick:

[M-R-P]

You are of course correct Mr P, but you are forgetting 1 small detail.....I can drive 'our' Volvo whenever I want :nutkick:

My issue is not so much the missus taking the car off me, but taking little M-R-P out and about. I'd rather he was in the safest car in it's class than in a 6 foot sardine tin that crumples like a paper cup in an impact.


Back on topic...

I'd also like to have a nice burble from the backbox. Since you say you've got a hole in the box and it sounds nice, why not just put some Krust on it and enjoy the soundtrack :)

[silverhorse]

Stay on topic please girls!!!

[M-R-P]

Stay on topic please girls!!!

He started it lol

[M-R-P]

There's some nice cheap backboxes on fleabay with 3" outwardly rolled tips but there's gonna be some plumbing involved as the pipe leading to the backbox is at 45 degrees. Then there's the risk of that horrible "Jap" drone on the motorway. I like to hear the stereo.

[jotter22]

The drone can be left behind if you drive fast enough!...
Just go to powerflo or the like and tell them what you want!

Tony.

[Biff]

I'm really happy with my jetex, it doesn't sound standard, growls like a mofo on full chat & is drone free. I know mines a ph1 but I'd think seeing as jetex's slogan used to be "the silent performer" a ph2 system would be as refined.
I was in exactly the same boat as you, my mrs went in my v70r for the first time last week since I bought it in January, all due to the noise.

[Gold 'N' Brown]

I'm in the same boat.

It was always on my agenda to get a better sounding exhaust, after all, the sound of a 20 valve turbo is one of the main benefits of owning a T5 :biggrin:. And now I've just found my back box is leaking in two places, it's going to have to be bodged for the MOT and then replaced once I'm back on the road.

I'll be going for a custom made one. Where, I don't know. I know what I DON'T want, and that's an obviously aftermarket looking, big shiny thing sticking out under the valance with a stupid pipe on it. I want the box to be as hidden as possible (like the original) and I either want a discreet pipe, or a slash cut twin outlet like the V70R. As mine is a proper grandad mobile in a nice shade of "metallic urine" (Champagne) I might even see if I can get a down turned tailpipe :wink: Keep it proper stealth looking.

[M-R-P]

I've had an idea....

[Biff]

I've had an idea....

Uh-oh.....
The vw lads run diesel type tailpipes cut short when they flush the exhaust recess off, I've always liked the idea of a stealth system.
A decent custom place could knock up any design, reason I went for my jetex was the fact it was quiet & the local custom exhaust bloke is a complete nob.

[welderone]

Done my S60 from turbo back last month what a difference too cat taken out as well. Peter http://i590.photobucket.com/albums/ss342/welderoneuk/VOLVOEXHAUST016_zps45043242.jpg (http://s590.photobucket.com/user/welderoneuk/media/VOLVOEXHAUST016_zps45043242.jpg.html) 75 mm dia pipe turbo backhttp://i590.photobucket.com/albums/ss342/welderoneuk/VOLVOEXHAUST014_zps610b72d0.jpg (http://s590.photobucket.com/user/welderoneuk/media/VOLVOEXHAUST014_zps610b72d0.jpg.html)

[T5RatherAmusin]

aye, get over to powerflow.....
if you want mega sounds get a straight thru catback. if you want a nice medium- quiet when you want, raging when giving the beans! get a middle box too
http://i1036.photobucket.com/albums/a441/Ian_Armstrong/IMAG0486-1_zps8f9c434a.jpg

[dionbullock]

Like most of you on this topic, im really interested in changing the 'zorst (max power spelling ftw!) too!! theres a 'zorst fabricator 10 mins from me and he usualy does turbo back systems for about 280 - 320 ish which is good value and his work is spot on!

The only thing stopping me is the noise a gaytronic makes when you put a 'zorst on it... might be me, but it doesnt sound right! But being custom made, he could always tone it down if needed.

He did a full system for me on my previous manual p1 T5 and it sounded amazing! I then sold the car to my father who couldnt stand the noise so the cat and a middle box was fitted back on to her, she now purrrsss like a kitty!

[graemewelch]

i built my own. ill post up a video clip

[copie22]

there a few places about that will make you a stainless system for you car and make it sound like you want it to. loud or not so..local we have rebel power systems

[T5rookie]

As i'm sure you know, P2's are very good at deadening engine and road noise anyway.....it may be too much for you but I cut my backbox off and finished it in polished 2.5" stainless. It is loud from outside or with all the windows down, but at motorway speeds I can cruise and the mrs can comfortably sleep.

[M-R-P]

As i'm sure you know, P2's are very good at deadening engine and road noise anyway.....it may be too much for you but I cut my backbox off and finished it in polished 2.5" stainless. It is loud from outside or with all the windows down, but at motorway speeds I can cruise and the mrs can comfortably sleep.

Been toying with this idea for a while now but I recon it'll be a bit too loud :(

[silverhorse]

Been toying with this idea for a while now but I recon it'll be a bit too loud :(

I think you could be right. Could be a good idea but if it is too loud I will just get constant grief from the wife. I think I will go and see the chaps at Powerflow in Norfolk near me and see what they can come up with. Will cost a lot more than one of the fleabay jobbies no doubt, but they should be able to tailor one to what I want hopefully.

My biggest fear (apart from the wifes incessant moaning) is sounding like an 18 year old nobhead in a Peugeot 106 1.1 Mardi Gras with a drainpipe on the back. I am 40 after all!!

[M-R-P]

I'm gonna try something when I get the chance. Will update if it works ;)

[Brett855tdi]

I've always thought the jetex is good for this.... Seen a few fitted and they sound nice.
And as u can see a few people big up the jetex.

If your looking for a cheaper option... Switch out the silencers for stainless ones one by one untill you get the sound you like....

Also a 3" downpipe with hi flow or decat will make a noticeable difference while adding good power gains.

[T5RatherAmusin]

I think you could be right. Could be a good idea but if it is too loud I will just get constant grief from the wife. I think I will go and see the chaps at Powerflow in Norfolk near me and see what they can come up with. Will cost a lot more than one of the fleabay jobbies no doubt, but they should be able to tailor one to what I want hopefully.

My biggest fear (apart from the wifes incessant moaning) is sounding like an 18 year old nobhead in a Peugeot 106 1.1 Mardi Gras with a drainpipe on the back. I am 40 after all!!

got my powerflow catback for 180! sounds gorgus!
they will give you the sound your after. your wife will love it! :rotfl:

[V70 Graham]

got my powerflow catback for 180! sounds gorgus!
they will give you the sound your after. your wife will love it! :rotfl:

And where did you get that may I ask.

[T5RatherAmusin]

And where did you get that may I ask.

welsh coast customs- powerflow. newport

[Gold 'N' Brown]

@T5Rookie - Are you able to take a basic DB reading from the exhaust? If you've got an Android phone or iPhone you can download free Decibel Meter apps. Failing that, a video would be cool

[Gold 'N' Brown]

Been toying with this idea for a while now but I recon it'll be a bit too loud :(

I'm very interested to hear what it sounds like. It actually might not be too bad...

Obviously all cars and exhaust systems work diffently, but with some fundamental similarities. Quite a lot of cars do the majority of their sound deadening in the centre box, and the back box is just there to take the edge off. Obviously there's more to it than that LoL. But taking the back box off might not make as significant a difference as one might expect if the standard centre box, Cat and DP are all in place.

[M-R-P]

Stephenevans dissected his backbox and it was rammed solid with packing fiber. Hugely restrictive.

[T5RatherAmusin]

ive run mine without a backbox for a few days :rotfl:
wasnt that loud, but horendously violent!

[silverhorse]

Stephenevans dissected his backbox and it was rammed solid with packing fiber. Hugely restrictive.

I remember that. There are some pics of it on here somewhere i think. Might look in to that option

[T5rookie]

I will take a video tomorrow for anyone that wants to know what it's like....

Another option is what I had on my first P2 which was a ferrita cat back with the middle silencer removed. Was nice but trouble was it was boomy even though not that loud.

The issue with turbocharged cars isn't really the db level or how loud the bark is, it's the drone and the boom caused by rear silencers.

I am an exhaust whore and have had up to 20 cars all with different exhaust setups. A big silencer creates boom, as does a rear box. I found that having 2 small silencers, one around where the cat's are and one around the passenger seat area, killed most of the boomy noise and gave it still a loud bark.

The only issue with my current setup is I am not using an aftermarket middle box so I have the old naff centre box. As a result it can sound a little drainpipe-like when cold. Once warm it just semi warbles though like an impreza.

If you have to go to a fabricator I would use longlife over powerflow anyday....they are affiliated with each other but longlife fabrication seems better quality and the 304 steel is better too.

The main issue with powerflow and longlife and even jetex and ferrita.....they all seem to be stuck in the 90's with tailpipe design, naff rolled tips in wierd bore sizes, horrible novelty finishes like twin oval corsa styleeee etc etc. I still can't figure out why the ferrita for a p2 exits down towards the ground??? Looks like a massive shiny pringles can sticking out of your back bumper!

To be even more geeky and boring.....powerflow and longlife use crush bends.....you will pay for 2.5" pipework which they will charge extra for as their stock size is 2.25....then crush bend the pipe so that on any substancial bend it will actually reduce back down to 2.25 or sometimes less if it's a big bend! Find a fabricator who mandrel bends or go off the shelf and adapt it if it's not exactly to your liking.

Just my 2p

[stephenevans99]

Here's a few pics of my back box cut open showing the restriction:

http://i24.photobucket.com/albums/c2/stephenevans99/Volvo%20S60%20D5%202004/DSC03341.jpg (http://s24.photobucket.com/user/stephenevans99/media/Volvo%20S60%20D5%202004/DSC03341.jpg.html)

http://i24.photobucket.com/albums/c2/stephenevans99/Volvo%20S60%20D5%202004/DSC03343.jpg (http://s24.photobucket.com/user/stephenevans99/media/Volvo%20S60%20D5%202004/DSC03343.jpg.html)

[silverhorse]

Here's a few pics of my back box cut open showing the restriction:

http://i24.photobucket.com/albums/c2/stephenevans99/Volvo%20S60%20D5%202004/DSC03341.jpg (http://s24.photobucket.com/user/stephenevans99/media/Volvo%20S60%20D5%202004/DSC03341.jpg.html)

http://i24.photobucket.com/albums/c2/stephenevans99/Volvo%20S60%20D5%202004/DSC03343.jpg (http://s24.photobucket.com/user/stephenevans99/media/Volvo%20S60%20D5%202004/DSC03343.jpg.html)

Cheers for those Steve. Did you take the box apart just cos you were bored and wanted to destroy something!!?? or did you patch it up again once emptied and put it on the car? If you put it on again, what did it sound like?

[M-R-P]

Speaking of destroying something, It's been agas since I posted this vid...


http://www.youtube.com/watch?v=c_7ZrfqB3zs

[stephenevans99]

I had the back box cut open after I had my s/steel system put on. I think the restriction is the fact that the gases enter into the centre section first then travel through the baffle into the front section and then through the pipe to the rear & through the nylon packing.

http://i24.photobucket.com/albums/c2/stephenevans99/screen-capture-9.jpg (http://s24.photobucket.com/user/stephenevans99/media/screen-capture-9.jpg.html)

[silverhorse]

Speaking of destroying something, It's been agas since I posted this vid...


http://www.youtube.com/watch?v=c_7ZrfqB3zs

You've got issues!!!;)

[M-R-P]

You've got issues!!!;)

Not any more lol

[Gold 'N' Brown]

If you have to go to a fabricator I would use longlife over powerflow anyday....they are affiliated with each other but longlife fabrication seems better quality and the 304 steel is better too.

The main issue with powerflow and longlife and even jetex and ferrita.....they all seem to be stuck in the 90's with tailpipe design, naff rolled tips in wierd bore sizes, horrible novelty finishes like twin oval corsa styleeee etc etc. I still can't figure out why the ferrita for a p2 exits down towards the ground??? Looks like a massive shiny pringles can sticking out of your back bumper!

To be even more geeky and boring.....powerflow and longlife use crush bends.....you will pay for 2.5" pipework which they will charge extra for as their stock size is 2.25....then crush bend the pipe so that on any substancial bend it will actually reduce back down to 2.25 or sometimes less if it's a big bend! Find a fabricator who mandrel bends or go off the shelf and adapt it if it's not exactly to your liking.

Just my 2p

Some good advice there.

I've heard good and bad about both Powerflow and Longlife. It seems to be more a case of which branch you go to, than the company name. Quality of construction is going to be largely dependant on the skill of the person putting it together.

Then I've heard bad things about the quality of materials used, with systems going rusty, welds rusting, systems falling apart within a year.

The bit about the crush bends is good advice. It's something I hadn't even considered!

Also, I've got to pick up on this myth that "they can make it sound how you want it". Not really. I'm sure they can make it as loud or as quiet as you'd like it within reason. But building exhausts properly, and tuning them, both in terms of flow and accoustics, is both an art and a science. You just aren't going to get that from a franchise that chucks out cheap exhausts for any car that they can throw together in a few hours. I'm fairly certain Powerflow have a range of standard silencers that they use in all their exhausts. What they are doing is picking the boxes from their standard range, making them fit by custom assembling the pipes and hangers, and then welding on the tailpipe of your choice. What you can actually do with an approach like that is fairly limited in terms of accoustics.

[LeeT5]

Got a little blow on the top of the back box about the size of a 50 pence piece. Could easily jollop it up or get a plate welded on, but the annoying thing is that it actually sounds good at idle and when you give it the beans.
Which leads me to thinking about a performance replacement.
I know some of you have these so am after a bit of advice really.

Car is 2005 2.4 V70 T5 and I am after subtlety not like a boy racer. Menacing at idle and a nice growl under load but I have to carry the wife, so must be fairly quiet at gentle driving.

Any suggestions???

Cheers
Paul

Worth the drive mate!!

http://www.vpcuk.org/forums/showthread.php?43367-Custom-2-5-quot-cat-back-exhaust-made-today

Steve (S60R) had his exhaust tips modded by these guys too and he's well chuffed!

[silverhorse]

Me likes that Lee, me likes that a lot!!! £440 seems good as well. The wife would not moan too much about the increased noise.
Did you ever get around to doing the launch vid? Saw the pre-launch vid.....

[LeeT5]

Work in progress. Got ma go pro sucker, just need the dam iPhone adaptor.