Dan W

Advice will be much appreciated - Please dont confuse my little mind more tho

TonyBurns

iTrader: (3)

STI or Cosworth, both are service items (ie disposable) so need replacing every 15-20k.

Tony

Dan W

STI PPP 54 plate

I bought the car in April so want to service it for piece of mind.

Stevesbluewrx

iTrader: (4)

+1 with Mr Burns.

Another one I found PERSONALLY were the Green and JR filters.

Steve

L.J.F

iTrader: (31)

I would say either the Green cotton panel filter or a Sti filter from somewhere like scoobyparts.com

Camoscooby

iTrader: (5)

Do Luck @ Sumo Power

nathanb

iTrader: (1)

Do they really make any difference? Minimal if anything!

Leaney-g

The best filter on the Market for a 2004 STI is 'Do luck' it costs £35.00 and gives you up to a 13bhp increase.
Cosworth only gives up to 9.3bhp. And the Green panel filter costs £53.85 and only gives up to 10.52bhp.

Leaney-g

The best filter on the Market for a 2004 STI is 'Do luck' it costs £35.00 and gives you up to a 13bhp increase.
Cosworth only gives up to 9.3bhp. And the Green panel filter costs £53.85 and only gives up to 10.52bhp.

nathanb

iTrader: (1)

Is this a joke. I dont think you'll get 13bhp from a replacement pannel filter

If thats true get me one of those *******!!

Leaney-g

I would also buy the 'Do luck' over the cosworth as you can wash the 'Do luck' and use it again. So it will obviously save you some cash in the long run.

Leaney-g

This is backed up by the July issue of the Japanese performance mag.

Leaney-g

I would also buy the 'Do luck' over the cosworth as you can wash the 'Do luck' and use it again. So it will obviously save you some cash in the long run.

TonyBurns

iTrader: (3)

I will stick with STI, I gained 12bhp on one of these on a standard JDM STI (no remap), but thats what it was designed for (tested on the rolling road over a standard, and very new normal filter).

Tony

Leaney-g

12bhp from the STI panel??? That has to be a first.

The 'Do luck' is also cheaper than your one and you get an extra horse so I
know what one I would choose.

chunkb

The STI filter drops the bhp by approx 6bhp,give it a miss.

Leaney-g

The STI filter does appear to be one of the worst.
Tony Burns stated on a very old post that it gave him 10bhp not 12bhp and that others wouldn't see a 10bhp increase anyway as his old filter was decreasing performance beforehand.

Stay away from the STI panel.

TonyBurns

iTrader: (3)

12BHP and 15lbs of torque actually on a heat soaked intercooler, whilst I was there, 2 runs with the standard filter, 2 mins on the rolling road whilst the filter was changed and 2 runs after, this was not on a well run in car, this was on a car with 1800 miles on the clock, ie still tight, and was witnessed by lots of people and I was there also to witness it.
This rolling road also consistantly give my car similar performance figures over the years, make your own mind up, but its one of the best "filtration and performance" filters out there, you may find that the do luck wont filtrate as well, and if you ever saw a proper STI filter you may stare at it in awe, its a piece of beauty to look upon (as well as being very good )

Just one quick point, they never ran with an STI panel filter in that test, unless you have see one tested on an STI (think im the only person who has any conclusive results on that ) then you cannot say what power it pushes out

Tony

richie001

iTrader: (3)

I didn't think that Panel Filters could give you that much BHP,I thought 5-6 tops.

Leaney-g

STi panel filters, any good?
OH YES
Just a little improvement on the rolling road today, added 10bhp and 10+lbs of torque
Shows you how much better they are than the standard item (except they probably cost considerably more )
Should you buy one?
Yup

Tony


I should state that my car will gain the highest from one of these filters due to the restrictiveness of the filter that was in there, some people may not get these sort of gains but you will get gains overall (if replacing the original filter) plus this i think is a cotton filter so is dry rather than one soaked in nasty gunky oil which will drip into your air box but the car does sound louder now its fitted (taking into consideration my car doesnt have any soundproofing here!)

Leaney-g

The above is your quote Tony Burns.

So the STI filter isn't anywhere near as good as the 'Do luck'.

No need to get funny, it's just a fact.

TonyBurns

iTrader: (3)

It basically went from 297lbs of torque to 312lbs and 287bhp to 299bhp, had the rolling road printout somewhere, think I was just impressed at the time how much it actually gave, also it improved drivability.

here is a later quote, the first quote given was when I had just come back from the rolling road, on looking at the 2 printouts I saw the exact increase.

https://www.scoobynet.com/general-te...el-filter.html

Remember, 1800 miles on the clock, no other mods except a backbox, this car gained "16" bhp when she was run in, and she probably still had less than half the miles on that MY04 uk sti had

Tony

Leaney-g

But you said it others shouldn't expect the gains you got as the filter you had in before.

So if you got an extra 10bhp and after you take into account the filter you had before hand was restrictive. Anyone else would probably get around a 5bhp gain from the sti filter.

So with the 'Do luck' cheaper and giving 13bhp I can't understand why there is a debate.

Seems pretty simple to me, hopefully now I have broken it down for you, you may now understand.

harvey

iTrader: (48)

There is not much wrong with the O/E Subaru filter other than it has to be changed regularly and before the full service interval.
If you are keeping the car for a few years it makes sense to have a reusable filter, providing you are prepared to clean it regularly.
Stories of 12 or 13 bhp from a panel filter change without a remap are just that and even with a remap gains are minimal, if atall. A further consideration is how much dirt can pass the filter. Having done a number of tests I have generally settled on K+N pannel and cone filters. Avoid steel mesh.

TonyBurns

iTrader: (3)

A wrx wont have similar gains to an STI, do you understand that? a classic turbo wont have similar gains to a new age STI as they have a more restrictive air intake? understand??
You put the "do luck" in yours, ill put a decent filter in mine that I know performs
And as I have said (a few times), the car tested there is well run in, mine had 1800 miles on the clock, by 10k miles she was pushing 16bhp more, some of that would have been due to the better air flow given by the STI panel filter (and it would have been in there 8k miles so not new).
Mine also gave better drivability, where as she was restrictive above 6.5k, after the filter change she was not.

If you want another test, go do a search for the one Harvey did, the STI filter didnt do well there, actually none of the filters did very well but they were tested on a new age WRX, Harvey concluded in that, that the standard item gave the best filtration, followed by the STI item, the foam items giving the worst filtration rate, also something to think about

Tony

TonyBurns

iTrader: (3)

Ah, Harvey beat me to it

Tony

Leaney-g

I haven't mentioned anything about a WRX.

First off you stated you got 10bhp from the STI panel. And you then stated others shouldn't expect to receive those gains as you had a restrictive filter panel on before hand. So other STI drivers shouldn't expect to get an extra 10bhp.

The point of your this thread was to advise of the best filter panel. And a published test has shown that 'Do luck' gives 13bhp. You have advised yours gives 10bhp. Plus the 'Do luck' is cheaper.

Therefore there is one winner.

TonyBurns

iTrader: (3)

There is no winner, thats the point
12bhp and 15lbs of torque on a "tight engine" that when run in was consistantly putting in similar figures, you put your "do luck" in and ill just laugh, go for it, im more than happy with the decent STI item that does the job, yes it costs more but it doesnt look like a cheap crappy item as the do luck does, it also gives better filtration (thats the big point too), tell you what, when I get my car on the rolling road and replace the filter, bring yours down, have a standard filter handy, we will run both before hand then change the filters and run both afterwards, not forgetting that these are 2 different cars, or just lend me your do luck and ill do it all for you expect different cars to do different things, the STI filter was specifically made for the STI, the rest were not.

Tony

Sabas

iTrader: (22)

K and N the best for a classic, or an STI one?
Leaning towards K and N

Sabas

iTrader: (22)

Just seen the price for the sti filters, ouch, how often does the sti filter need to be changed?