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Cone air filters


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56 replies to this topic

#1 OFFLINE   puddlethumper

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Posted 06 November 2017 - 07:54 PM

What's the craic with these. I know they let more air through compared to paper jobby's but, for example, how long are they good for?

Any learned shiters with experience of them?

 

Yours sincerely,

          Filter dimwit.



#2 OFFLINE   Bren

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Posted 06 November 2017 - 07:57 PM

They generally need a feed of cold air to be of any benefit - high under bonnet temperatures usually reduce power.

#3 OFFLINE   twosmoke300

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Posted 06 November 2017 - 07:58 PM

Junk - noisy and don't gain any power . Car manufacturers aren't stupid . Look how complicated a modern air box is . They could make it quiet and restrictive very easily but they make it quiet and free flowing .
Good example is the Saab 9-5 one - flies enough air for a 500hp car !
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#4 OFFLINE   cobblers

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Posted 06 November 2017 - 08:02 PM

Yeah they're basically wank. Alright if you're bodging engines in stuff etc.

Apart from in some oddball cases where the OE airbox is purposefully strangled for some reason, they'll perform worse than the stock stuff in every area other than "making a row" which is OK if that's what you want, I suppose.

 

I had to fit one on my old T25 that had a Golf GTI engine in. It sounded absolutely loisy and did my head in.


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#5 OFFLINE   dollywobbler

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Posted 06 November 2017 - 08:07 PM

Engine Masters (same folk as Roadkill) did a lot of air filter testing (albeit with huge V8s) recently. It was quite interesting.

 

In the main, no advantage to be gained other than induction noise, and if you don't fit a cold air feed, you'll actually make things worse, as others have said. They can help IF you're making a load of other mods, like a free-flow exhaust.


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#6 OFFLINE   twosmoke300

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Posted 06 November 2017 - 08:08 PM

I've got a k&n on the Landy as part of an acr su conversion and the induction noise drives me mental

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Brilliant... late in for lunch I fired up an off-brand pot noodle and while carrying it to the lounge successfully spilled it all over myself, burned the piss out of my hand, soaked my phone with the juice, soaked a load of expense receipts I was also carrying and it hit the hall floor and just fucking exploded....it was literally dripping from the ceiling in my newly decorated hallway. The obvious and considered reaction was to throw an immediate, massive paddy and boot the fucker down the hall while screaming, which has made the whole scenario about 18 times worse.


#7 OFFLINE   Tamworthbay

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Posted 06 November 2017 - 08:32 PM

Wil swop 4 brkn eggsbox 2niit m8
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#8 OFFLINE   nisfan

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Posted 06 November 2017 - 08:38 PM

On your average family car will probably make it worse due to sucking in hot air from the bay.
I had a primera with one and when it was freezing outside you noticed it had a bit more go but went as soon as the temps got up.
If you must fit one best getting a k &n panel filter but usually a waste of money.
I think turbos are better with them?

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#9 OFFLINE   DodgeRover

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Posted 06 November 2017 - 08:38 PM

Don't forget some/ most of them need treating with filter oil and not just leaving dry...

#10 OFFLINE   fordperv

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Posted 06 November 2017 - 08:38 PM

In most cases you would be much better with a replacement free flow filter element
Sir slidealot, knight of the roundabout

#11 OFFLINE   twosmoke300

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Posted 06 November 2017 - 08:39 PM

Yeh and that oil gets dragged onto the maf sensor ( if fitted ) and fucks them up too

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Brilliant... late in for lunch I fired up an off-brand pot noodle and while carrying it to the lounge successfully spilled it all over myself, burned the piss out of my hand, soaked my phone with the juice, soaked a load of expense receipts I was also carrying and it hit the hall floor and just fucking exploded....it was literally dripping from the ceiling in my newly decorated hallway. The obvious and considered reaction was to throw an immediate, massive paddy and boot the fucker down the hall while screaming, which has made the whole scenario about 18 times worse.


#12 OFFLINE   dave21478

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Posted 06 November 2017 - 08:48 PM

Plenty of cheap ebay pish that are really poor at actually filtering too....yeah it will keep the big lumps out, but its the small stuff you need to worry about.

 

Says the guy with one on his MGF. In my defence it was on it when i got it, and it sounds nice.


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#13 ONLINE   New POD

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Posted 06 November 2017 - 08:50 PM

In most cases you would be much better with a replacement free flow filter element

 

In most cases you'd be better off finding (in a scrap yard) an air box from a car with twice the power and fitting that.


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#14 OFFLINE   Rave

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Posted 06 November 2017 - 08:54 PM

I've never bought one, but they came already fitted to my Mk1 MR2, Eunos Roadster and...106 1.5D (?!). They all ran/run fine and didn't/don't sound objectionable. As others have said though, unless you position the cone in a cold part of the engine bay, you're unlikely to see any power gain.

 

Edit: K&N filters can be washed and re-oiled, the kit containing the degreaser stuff and oil spray is about a tenner IIRC.

 

If you're thinking of fitting one for potential power gains I would google your model of car first and see if other people have dyno tested them. On most cars you'd probably do better rigging up a cold air duct to the standard airbox, if you think the manufacturer's own arrangements aren't up to scratch.


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#15 OFFLINE   fiatdaft

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Posted 06 November 2017 - 08:55 PM

All the negatives above plus you always seem to lose out on a bit low end torque.


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#16 OFFLINE   Split_Pin

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Posted 06 November 2017 - 09:18 PM

Ive had one in my Astra for 10 years now. I swap between a foam Pipercross Filter and a more traditional fibre K&n. I dont have a cold air feed either as its right behind the Morette headlights which are nice and draughty.

I have not noticed any ill effects at all but there is zero advantage. In performance or noise.

Keep what youve got and just change the air filter every other year.
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#17 OFFLINE   puddlethumper

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Posted 06 November 2017 - 09:29 PM

Cheers collective. Interesting.

Ads "claim" they are better than paper and I can sort of see the logic. Paper does "sound" a bit restrictive and "free flow" doesn't.

Looks like I'll forget that then. Back to the drawing board.



#18 OFFLINE   DodgeRover

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Posted 06 November 2017 - 09:32 PM

I run one on my pinto engine but only because that's what was recommended with the lpg carb I'm running

#19 OFFLINE   Split_Pin

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Posted 06 November 2017 - 09:33 PM

Dont believe the claimed power 'advantages' from the manufacturers of this sort of paraphernalia.

What car are you looking to make go faster?
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#20 ONLINE   rainagain

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Posted 06 November 2017 - 10:00 PM

This guy's site is good reading:
http://www.autospeed...Filter&A=111486

#21 OFFLINE   uk_senator

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Posted 06 November 2017 - 10:26 PM

I put one on my Boxster when I first got it, it then blew 2 airflow meters.. (£600 a pop at the time).

Got a K&N panel in my XJR, no problems. Had one in my 2.0 Tempra, no problems, put one in my folks V50 1.8, no problems. Brothers got an enclosed cone filter on his 500 Abarth, no problems.

I have a pair of black tights on my Uno`s open air filter box, I think they are 8 dennier? 


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#22 OFFLINE   stuboy

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Posted 06 November 2017 - 11:09 PM

pipercross panel filter on the mondeo was noticeably better on acceleration


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#23 OFFLINE   unclecalzone

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Posted 06 November 2017 - 11:11 PM

Had a k&n panel or ramair foam one in every car I’ve owned, It’s amazing how many people never clean them or run them with no oil.
They never filter as well as paper apparently but I’ve never noticed any difference. I’d probably run a paper one if I lived in a dusty dry country

#24 OFFLINE   stuboy

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Posted 06 November 2017 - 11:16 PM

Had a k&n panel or ramair foam one in every car I’ve owned, It’s amazing how many people never clean them or run them with no oil.
They never filter as well as paper apparently but I’ve never noticed any difference. I’d probably run a paper one if I lived in a dusty dry country

gonna see if i can squeeze 0.5 bhp with panel filter in the 1.6 focus


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#25 OFFLINE   Felly Magic

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Posted 06 November 2017 - 11:25 PM

The black Fabia estate I viewed last year had one bodged in, it was a boggo OHV 1.4, with a dead head gasket (coolant jet black and oily & mayo under the cap), car sounded fooked, air trunking looked like it had been cut with a blunt stanley knife, car ran like shit, I walked away as it had clearly been abused by an idiot


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#26 OFFLINE   nisfan

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Posted 06 November 2017 - 11:29 PM

Or do what some idiot did and tape a briilo pad over the maf on his clio.


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#27 OFFLINE   strangeangel

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Posted 06 November 2017 - 11:30 PM

No experience with cars, but using aftermarket air filters that require removal of the airbox on bikes and scooters has never ended well for me. This includes both no-name Chinese shit, and yer more expensive, better class of shit like K&N. I would avoid like the plague.



#28 OFFLINE   Des

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Posted 06 November 2017 - 11:31 PM

In the past I've murdered a 50p charity shop find Ford fitment K&N onto an old Nissan van that maxed out at 75, opened out the main jet a shade and was rewarded with 85 MPH, although may have been down to the jet meddling alone.


Festering scum of the earth, yer motoring public.

#29 OFFLINE   Noel Tidybeard

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Posted 07 November 2017 - 01:14 AM

a cone filter is standard on a hunda s2000

 

someone on civinfo forum did extensive tests on his 2.2 derv- panel, cone and std - standard filter won!


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#30 ONLINE   paulplom

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Posted 07 November 2017 - 05:40 AM

I had one on my last T-5. It sounded great but I'm nearly sure it made it slower. No improvement anyway. I swapped it out again the next time I could be arsed.






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