Is buying a K&N air filter for a Volvo worthwhile?
Is buying a K&N air filter for a Volvo worthwhile?
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Discussion

Rusty-C

Original Poster:

291 posts

195 months

Thursday 15th September 2011
quotequote all
Believe it or not, my 2.4 S80 (yes really) sounds quite nice, but I wouldn't mind if it sounded better, more of the time. I'm guessing a decent air filter may achieve this, or is it tantamount to picensoreding in the wind? It's a large automatic Volvo (and I already know this), please show mercy.

v8will

3,308 posts

216 months

Thursday 15th September 2011
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Short answer: No.

Fartgalen

6,812 posts

227 months

Thursday 15th September 2011
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Hmmmm, no. You don't really change an air filter in order to get a better sound.
Although they can make a small difference. Depends on what kind of filter you're talking about.
A replacement panel filter in the airbox will make naff-all difference.
A bolt on cone type filter might make a small sound difference. (ie, replacing the air box).

Mastodon2

14,129 posts

185 months

Thursday 15th September 2011
quotequote all
Fartgalen said:
Hmmmm, no. You don't really change an air filter in order to get a better sound.
Although they can make a small difference. Depends on what kind of filter you're talking about.
A replacement panel filter in the airbox will make naff-all difference.
A bolt on cone type filter might make a small sound difference. (ie, replacing the air box).
Depends what kind of car it's on. Changing from an airbox to an open cone filter can make a big difference to induction noise. Most factory-fit airboxes are restrictive, preventing optimum airflow into the engine (for economy perhaps?), and minimising noise - induction roar is not something old Bob wants to hear in his Mercedes when he is driving his wife to the Carvery on a Sunday afternoon!

I've been looking at induction kits for my Civic Type R and there are a few options. Open cone filters are not recommended on the VTEC engine because they can harm throttle response, which is obviously not such an issue on turbo cars but could be quite detrimental to the VTEC style engine. A lot of the induction options for the Type R involve airboxes of various materials and shapes, some with integrated cold air feeds, to improve airflow into the engine without losing the intake pressure required for crisp throttle response. All the various kits, with their differences in shape and build, have different induction noises.

Cone filters, particularly on turbo engines, allow for a real sucking / whooshing noise when the turbo is spooling up, the overall effect is best described as the engine just sounding more free, as if it's breathing better, which of course, it is.

As for K&N, I wouldn't bother. Allegedly, they hold a lot of oil which can eventually coat your MAF and give it some trouble. Induction was is a hot topic for debate on my previous car, a Seat Leon Cupra R, with a lot of options for induction kits. The most popular option for Cupra R owners were Jetex filters of various descriptions, but there were some other popular choices, Green Cotton probably being the second most popular brand. My car had a Green Cotton fitted when I first got it, I changed to a smaller Jetex filter but the engine seemed ever better for it. Cheaper than a K&N, excellent service and the bloke I spoke to on the phone was very knowledgeable too. They definitely both had different sounds! Depending on the shape, size and material used in the filter's construction, the pitch and tone of the induction noise is altered.

I will agree though, that if you maintain the standard airbox your car comes with and change the panel filter, the change in induction noise will be minimal to non-existant.

EDIT: If you really want your Volvo to sound better, consider a sports exhaust. There may or may not be some off-the-shelf options available, I'm not that down with the Volvos. However, your best option is probably to visit a custom exhaust fabricator. They will be able to get the tone and volume you specify (within reason, they can't make your Volvo sound like an Impreza for example) and you can choose the style of tailpipe, so you get pretty much all your aesthetic boxes ticked. For the fabrication and fitting of the box, I'd reckon you'd be looking at about £200.

Edited by Mastodon2 on Thursday 15th September 00:50

Mr Dave

3,233 posts

215 months

Thursday 15th September 2011
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Drill holes in the air box and cut some silencers out of the exhaust and get some pipe welded up to replace them.

As for people saying cone air filters make a small difference? Every car I have been in with one has sounded a good bit louder.

Garlick

40,601 posts

260 months

Thursday 15th September 2011
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Russell

You work within the PistonHeads office, and as such I am saddened to see this post.

Of course it isn't worth it. You aren't 16, you don't drive a Nova and you should be ashamed of yourself. In fact, I think I'll pop to HR to see if this post is a disciplinary offence.......

Riggers

1,859 posts

198 months

Thursday 15th September 2011
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Mastodon2 said:
Sports exhaust.
S80?? Sports exhaust? Definitely worth a double rofl

Get yourself a meter, a CB radio and some anti-macassars, Rusty, and make yourself some extra cash out of hours... wink

anonymous-user

74 months

Thursday 15th September 2011
quotequote all
Fartgalen said:
A bolt on cone type filter might make a small sound difference. (ie, replacing the air box).
Made a huge difference to my old V6. ste in the summer though.

Rusty-C

Original Poster:

291 posts

195 months

Thursday 15th September 2011
quotequote all
Garlick said:
Russell

You work within the PistonHeads office, and as such I am saddened to see this post.

Of course it isn't worth it. You aren't 16, you don't drive a Nova and you should be ashamed of yourself. In fact, I think I'll pop to HR to see if this post is a disciplinary offence.......
getmecoatgetmecoatgetmecoatgetmecoatgetmecoatgetmecoatgetmecoat

Mr Dave

3,233 posts

215 months

Thursday 15th September 2011
quotequote all
Ignore these people, they are just trying to bring you down, it will sound brilliant, do it!

Do it and prove them wrong.

And put a video up on youtube.

kambites

70,289 posts

241 months

Thursday 15th September 2011
quotequote all
Putting a cone type filter on will make induction louder. It will almost certainly also reduce power, assuming the standard air box pulls its air from somewhere cool.

Mr Dave

3,233 posts

215 months

Thursday 15th September 2011
quotequote all
kambites said:
Putting a cone type filter on will make induction louder. It will almost certainly also reduce power, assuming the standard air box pulls its air from somewhere cool.
They can give you more torque, better throttle response, and a better noise though. Its never a huge loss of power.

schmalex

13,616 posts

226 months

Thursday 15th September 2011
quotequote all
Garlick said:
Russell

You work within the PistonHeads office, and as such I am saddened to see this post.

Of course it isn't worth it. You aren't 16, you don't drive a Nova and you should be ashamed of yourself. In fact, I think I'll pop to HR to see if this post is a disciplinary offence.......
Being "down with the kids", I recognise this post as Russell being pwned

NotKenBlock

7,272 posts

204 months

Thursday 15th September 2011
quotequote all
Personally i'd try the free option of a drilled airbox first if you want to just increase noise.


Garlick

40,601 posts

260 months

Thursday 15th September 2011
quotequote all
Mr Dave said:
Ignore these people, they are just trying to bring you down, it will sound brilliant, do it!

Do it and prove them wrong.

And put a video up on youtube.
hehe

Get one of these too Rusty, it will look really good




Rusty-C

Original Poster:

291 posts

195 months

Thursday 15th September 2011
quotequote all
Mr Dave said:
Ignore these people, they are just trying to bring you down, it will sound brilliant, do it!

Do it and prove them wrong.

And put a video up on youtube.
Argh, alas, my main-man Judenn (from somewhere) has already obliged:

http://www.youtube.com/watch?v=5kmXnRXHrrg

CraigyMc

18,039 posts

256 months

Thursday 15th September 2011
quotequote all
Mr Dave said:
Its never a huge loss of power.
I've seen them fitted right by exhaust manifolds and behind radiators. In each case the intake temps will be higher, leading to a reduction in power.

C

y2blade

56,251 posts

235 months

Thursday 15th September 2011
quotequote all
Garlick said:
Russell

You work within the PistonHeads office, and as such I am saddened to see this post.

Of course it isn't worth it. You aren't 16, you don't drive a Nova and you should be ashamed of yourself. In fact, I think I'll pop to HR to see if this post is a disciplinary offence.......
rofl

y2blade

56,251 posts

235 months

Thursday 15th September 2011
quotequote all
NotKenBlock said:
Personally i'd try the free option of a drilled airbox first if you want to just increase noise.
yeah drill that airbox...let a load of engine bay heat in!!!


Mastodon2

14,129 posts

185 months

Thursday 15th September 2011
quotequote all
Mr Dave said:
They can give you more torque, better throttle response, and a better noise though. Its never a huge loss of power.
Unless you have a cone filter that is either heat-shielded off from the rest of the engine (usually with metal sheets as walls and floor of the shield box and the closed bonnet forming the roof) or you use a cone filter that has it's own integrated case around it, heatsoak will affect your power and throttle response. Standard airboxes are generally restrictive to airflow, allowing less air but at a higher pressure. Less overall charge going into the engine but the high pressure allows for the sharp throttle response.

I had an open, unshielded cone on my last car and on hot, still days the drop in power was very noticeable, the turbo took much longer to spool and was not as strong once on boost. Compared to a cold evening drive, the difference was black and white. With a cone filter you can get bigger highs of power but if you don't have a heatshield you can expect bigger lows too!

As for the lol at the suggestion of a sports exhaust on a Volvo S80, I'd imagine with a freer flowing ehxaust you could probably get a decent tone from the 5 cylinder engine. I've been in S60s and their inline 5s sound great when building revs, but the exhausts are nearly silent. While some might think that trying to make an S80 louder is folly, because most of the buyers are probably the kind of people that would appreciate the near-silent, refined drive, that is not to say that a decent exhaust system couldn't make one sound nicer.