Hi

I am after a new air filter/induction kit for my 02 WRX ( Bugeye ) but I am not too sure of which to go for.

I currently have a decat exhaust - and will be getting a remap hopefully in March, and have been told that I will need a decent one to get the best from the remap.

I dont wanna go over £100 if possible, so willing to get 2nd hand if needed.

Also - Who would you recommend to do my remap. I am based in Yorkshire, but willing to travel up to 100/150 mile. Can you also tell me how much it should cost me, and the possible gains ( torque & BHP ).

Answers to any of the above much appreciated.


Chris.

 

Just get a better panel filter (K&N/Green/etc) and have done with it. Well short of your budget and everything you need.

 

Will the panel filter make that much of a difference? And is that keeping the standard air box too?

Has anyone used the Blitz panel filters also? if so - are they any good?

Thanks.

 

Flow a little better, last longer. You won't gain worthwhile amounts of power from induction mods, the standard setup is good for a lot more than you are trying to get from it at the moment.

Yes, there's nothing to be gained (and things to be lost) from an induction kit unless you're going beyond the measurement capability of the standard MAF tube, which you aren't, unless your car has a load of mods you haven't told us about.

 

No - My car just has the mods mentioned.......... Thanks for the info.

Dont suppose you know where the bast place to go shopping for them is?


Chris.

 

Speak to Andy at AET turbos in Normanton.
They are doing some work for me and a remap very very soon!

 

I use an Simota racing panel filter and am happy (did have 57i K&N kit on my 2006 STI and after lots of research and asking questions and my own experience took it off and put panel in and sold the 57i)

Duncan Graham - DYNAMIX mapped my car yesterday and I would highly recomend him.

 

JAKEsti - what difference has the map made to the car? and what car do you have? and what mods do you have?

Thanks

 

Scoobyparts - Subaru Impreza parts and accessories I ordered a green panel filter from them at 14.45 on Tuesday and it turned up Wednesday morning

Rich

 

Certainly this review highlights 2 to avoid

http://www.mkiv.com/techarticles/filters_test/2/

 

Hi Splitpin, I personally would disagree with the above. Opening out the stock intake tract and creating a larger cavity in front of it made a extraordinary difference to my mid and top end power delivery. Other than that my induction is absolutely stock. This is on an STI8 PPP. Can't speak for other cars, I never tried this on either of my previous scoobs. If I get yet another Impreza it's the first thing I'd do again. Can't believe the difference it made for no money. Otherwise need to get my hands on someone else's car and see if the results are repeatable. Any takers?

 

Yeah. I'd be a taker on that one..... What do I need to do?

 

Hi, im at 331/335 with my54sti, decat and standard air box with k+n panel filter....... remap done by pat at the clinic...

When i go to the next stage ie bigger turbo i will almost certainly go with induction kit, possibly apexi cos ive had good results with these in the past on mr2 turbo's....
Not sure i like the idea of cold air kits that sit low down in the wing tho, personal pref i guess.
I may be wrong but 340-350 is at the limit for standard air box......
would be interesting to find out the best power figures thru the standard box tho and who did the mapping.

 

With all the talk of MAF problems with filters than need oil, would for example a pipercross one that is not oiled be a better choice?

 

No the ones i've seen are rubbish as is the myth about mafs and oil !

 

The STi panel filters from Japen are decent.

 

If I can find a media sharing site that actually works, I'll post pictures. Was using mediafire but it's been problematic of late. Might try google pics or whatever it's called instead. It does involve some cutting and hammering but nothing that's visible externally once you're done.

Basically, if my experience was anything to go by, the car already has everything it needs for a very strong induction system. Certain parts just need modifying slightly. Since I'm off week this week I'll have another go with posting. Then I'll create a little 'How To Thread'. Just need to get the car back from Subaru4you, who're busy welding another lambda bung into my downpipe, then I'll take some decent pictures of the induction.

 

Yes aXeL, we discussed this the other day remember, when you disagreed with me at first and ended up realising that your experience actually supported what I was suggesting?

In this particular case I was, just like that last thread, responding to the OP, Chavadurkin, thinking about fitting an induction kit, and my "you won't gain significant power from induction mods" was aimed specifically at his post, his car, and the particular buying decision he was making. It wasn't intended to be a sweeping generalisation that applies to all cars all of the time.

And again, as you are using the standard induction tract rather than an IK your own experience doesn't disagree with me, it supports what I was I was saying to Chavadurkin, which is that it's better to go for a better panel filter than a cone. Yes/no?

However, if you want to take what I said as a sweeping generalisation, until you've got some power output data on your modified standard induction tract and a standard one, we don't know whether the power gain you're getting is easily measurable let alone "significant". Now get some pictures up so we can see what you've done!

 

[quote=BOB'5;9064624]The STi panel filters from Japen are decent.[/quote


STI panel filters are expensive and drop bhp by approx 6bhp as tested in Issue No1 Scooby magazine.

 

blitz sus are quite good

 

so could you fit a k&n 57i to any classic and it wouldnt ruin the maf sensor?? i know i wont gain power from it but just for the sound really.

i have a green cotton panel filter in at the moment

 

Is that the Blitz panel filter, or the Induction kit?

Cos the test above shows that the induction cone isnt very good at filtering.

So come on guys ( and gals ) - which is the best. I will be getting a remap to go along with it, and maybe getting the car maped to run methanol ( after a read on here ) so obviously the engine will need to breath.

and what kinda power do you think I will get?

Thanks.

 

Has anybody tried the Cosworth one that is non oiled that litchfield imports sell?

 

We are talking about pannel filters on a Subaru and therefore the test above on cone filters are not relevant.
Changing the O/E filter on different makes and models will have differing effect, never mind changing to a cone.
Changing to a cone can and does in some instances cause weak running that can and has resulted in pistons picking up in the bore. This is avoided with a remap or a MAF rescaling.
Similarly, fitting an APS CAK with inner wing filter can cause weak running and as I know to my cost, many years ago, this can result in engine damage.

Now I conducted panel filter trials on an STi 3 Wagon and as the results were contrary to expectation I repeated them the next day with exactly the same outcome.
Four panel filters, new O/E Subaru, and K+N panel both gave exactly the same reading. An HKS foam gave marginally more power. An STi panel with the very fine white filter material gave slightly less than the O/E and K+N.
The spread between "best" and "worst" 1.7 bhp.
I removed the snorkle and power was down 8 bhp. Whether this would have altered with mapping I do not know. I suspect turbulent air flow, close to the MAF Sensor without a plastic link pipe was to blame.
At the time the car had an O/E ECU, non mappable.

I then tried to test filtration using sweepings and a vibrating shaker plate.
The HKS foam let through particles the size of sand grains. Not a good thing for your engine.
The O/E Subaru and K+N performed very well.
The STi let almost nothing through.

I now use a K+N on a vehicle I want to perform or that I will keep and an O/E for a short term solution. The K+N is reusable with a cleaning kit. O/E I throw away after 3-5K miles subject to conditions.
The STi is disposable and at £60 a pop is OTT.
Exactly the same results repeated next day.

 

Oh. Avoid metal guaze filters like the plague.
Anyone that claims that a lightly oiled K+N causes MAF problems is either a numpty because they overoiled the filter themselves or is regurgitating something they read somewhere or were told by "someone" Complete bollocks. Another Scooby myth.
I am sure there are some cars that will benefit from an aftermarket filter but it is not Classic Subarus or New Age M/Y 01-05 and I know that from the work I do on them.
Generally the 97-00 cars are OK to around 350 bhp before a cone is a clear benefit but without remapping there are risks and certainly not optimal gains. On new age I guess it is a good bit more and probably in the 400 bhp bracket.

 

A sweeping statement -see Harveys' comments on remapping.
For the OP, for your target power you may as well keep to the OEM filter, but make sure it gets replaced at service time or earlier if it looks dirty.

Nick

 

itg panel filter all the way.

 

Hi Chava

I fitted the SPT induction kit (Subaru Enthusiasts | Subaru Performance Tuning) its a perfect fit, looks great, sounds great, also I cannot recommend Duncan of Team Dynamix enough, he is genius. Mapped my car last week and seriously, the difference its made is brilliant, its a completely different car now so give him a call. I am off to Janpseed this Friday for a dyno run as its the closest one to me, i think, so will post up the new figures

 

Shaggy, is the ITG a foam panel?
The O/P is looking for a cost effective pannel and at around £12 a new O/E Subaru item has to be about his best option immediately prior to mapping. Only go K+N if you are going to save on several O/E filters over your ownership duration exactly as Butty says.

 

As promised got the figures from the dyno today, 211 bhp and 224 torque at the wheels on a dynojet 4 wheel roller