Benjamins S2000 air filter mod.

[BENJAMIN]

Evening all, thought I'd share this with you. This is possibly the simplest and cheapest way to install an induction kit on your S3 using an off the shelf part that costs less than £20 and is available at any decent motor factors. I'll let the pics explain.

Remove the standard airbox and maf.
Take one of these (standard 1999 Honda S2000 air filter £18 inc vat from GSF)

Perfect size to slip over the oem maf. Its a very very tight fit but it does go and is a very good seal around the maf body.

You need to bend the tab that locates the standard airbox slighty clockwise to suit the tab on the honda filter. Also installed a cold air feed to the filter while there was nothing in the way.

Locate the filter through the tab and secure the maf back on to the tip. I secured the tip of the airfilter to the tab with a cable tie. Its secure and does not move due to the perfect length of the filter.

Done.

All it cost me was £18 at gsf! also being a filter fitted to a factory car its a non oiled paper element with the same filtering quality as an oem filter. Interestingly, depending on what brand you get supplied the colour of filter element and filter plastic varies, the nicest being a black plastic body with a red element that matches the S3's engine cover.
Hope this helps somebody.

 

[Dani_B19]

Class, sure people who dont have a cone filter already will like this.

 

[Prawn]

haha, that's brilliant!

Awesome find mate

 

[[Dave B]]

It'd be interesting to see before and after g/s figures for one of these...good find!

 

[16Klappe]

Good post that Ben.

I have seen a 4g/s increase over a Jetex and heat shield, I have also adapted one of Daves heat shields to work with this filter.

All in all I am very impressed, the price of the filters have dropped to just £13.06.

I will update later with logs.

 

[dancuz]

Where did you find one for £13? Just so happens I need a new filter round about now!

 

[16Klappe]

Euro car parts, ask for 10% discount and it is £13.06.

 

[s3clarke]

U can order them off eBay for £18 delivered as well just incase some of u can't be bothered to go get 1 I'll be ordering me 1 they look good.

 

[s3clarke]

Do get more induction and dv noise mate? Cheers.

 

[Dani_B19]

Yes it will be louder mater.

Jardo did you order off line or in branch?

 

[ShaunS3]

What's the verdict on this?

Is it a paper element cone filter i take it?

Can't really go wrong if it inreases performance at that price....sounds like a bargain!

 

[Gizmo68]

Do get more induction and dv noise mate? Cheers.

Open filter = more noise and more heat soak, which in turn = less power…. brilliant mod

 

[Westy]

Open filter = more noise and more heat soak, which in turn = less power…. brilliant mod

The turbo will heat It up anyway! The intercooler is there to cool the charge air before it goes into the engine. An open cone on a turbo car really won't effect performance as much as on a naturally aspirated engine.

I made nearly 10bhp by moving from the standard airbox to a big cone filter.

 

[ShaunS3]

The turbo will heat It up anyway! The intercooler is there to cool the charge air before it goes into the engine. An open cone on a turbo car really won't effect performance as much as on a naturally aspirated engine.

Took the words right out my mouth.

 

[16Klappe]

Open filter = more noise and more heat soak, which in turn = less power…. brilliant mod

My IAT's were below 10* on all runs, heat soak is not an issue. As Westy says, it's about to go into a million * turbo.

-

Induction noise is different from a Jetex in a shield, not that I care about that.

The filter is a conical paper filter with a mesh inner, what makes this filter better than a Jetex in terms of flow is the built in velocity stack at the mouth of the filter neck, and we all know what that does

And for an idea of size -

I went from a 70mm Jetex in a heat shield to this filter with an 80mm adapter. From that change I saw a 4g/s MAF increase, from 191.2 to 195.6. Can't complain at that from a K03s.

The old setup -

 

[Dani_B19]

Open filter = more noise and more heat soak, which in turn = less power…. brilliant mod

so whats this based in mate? Any evidence? As said the turbo heats the air upto over 150 degrees.

 

[BENJAMIN]

Open filter = more noise and more heat soak, which in turn = less power…. brilliant mod

*If* you have an effective enough intercooler, it does not matter what the charge temp is entering the cooler, the charge exiting the cooler will be the same...

 

[16Klappe]

so whats this based in mate? Any evidence? As said the turbo heats the air upto over 150 degrees.

He probably fitted a K&N to a Saxo back in 1996; I'd say we leave it and not derail what could be a very good topic for lots of people

 

[ShaunS3]

I saw a 4g/s MAF increase, from 191.2 to 195.6. Can't complain at that from a K03s.

Can you explain this in simple English for the selection of us not overly technically minded?

I assume the change is an improvement on the original Jetex filter?

What does 'from 191.2 to 195.6' translate to in terms of performance?

 

[Gizmo68]

so whats this based in mate? Any evidence? As said the turbo heats the air upto over 150 degrees.

Nothing worth mentioning really, I did pick up lots of useful tips from my (race) engine builder though.

ATEOTD it’s your car and your money to do with as you wish, I am simply letting you know the laws iof physics, cold air is denser than warm air, the denser the air the more power an engine can make, why do you think EVERYONE who knows anything about producing power will use a COLD air feed wherever possible?

The colder the air entering the filter the colder it will be in the inlet port pure and simple, this makes no differance whether it has gone through a turbo or not.

I wont even lower myself to the childish Saxo comment either other than to confirm I have never needed to drive a car like that.

 

[dancuz]

Can you explain this in simple English for the selection of us not overly technically minded?

I assume the change is an improvement on the original Jetex filter?

What does 'from 191.2 to 195.6' translate to in terms of performance?

Divide by 0.8 to get rough BHP reading.

So 191.2 g/s = 239bhp on jetex.
Gain from S2000 filter = 195.6 g/s = 244.5bhp.
K03s = the turbo

 

[Erf]

Ben - can I get this added to the list of things to do on Tuesday...?!

 

[16Klappe]

Nothing worth mentioning really, I did pick up lots of useful tips from my (race) engine builder though.

ATEOTD it’s your car and your money to do with as you wish, I am simply letting you know the laws iof physics, cold air is denser than warm air, the denser the air the more power an engine can make, why do you think EVERYONE who knows anything about producing power will use a COLD air feed wherever possible?

The colder the air entering the filter the colder it will be in the inlet port pure and simple, this makes no differance whether it has gone through a turbo or not.

I wont even lower myself to the childish Saxo comment either other than to confirm I have never needed to drive a car like that.

But your information isn't relevant and is massively flawed.

"The colder the air entering the filter the colder it will be in the inlet port pure and simple, this makes no differance whether it has gone through a turbo or not."

It makes a MASSIVE difference that it is going through a turbo; exposure to 150*+ style difference. It makes an even bigger difference that after the turbo it is going through an intercooler before entering the inlet manifold.

You can talk about what your engine builder says; but I've got a three year diploma in motor-sport development and I can tell you you're massively wide of the mark and am more than happy to evidence it for all to see. I'll more than happily post up my IAT logs which show NO change whatsoever between a shielded Jetex filter with a cold air feed and an open cone filter with no shield or feed. Can't ask for any more evidence than that?

Hugely sweeping rhetorical statements like "why do you think EVERYONE who knows anything about producing power will use a COLD air feed wherever possible?" do nothing to help your case, it just further proves you have a very limited knowledge of the field in which you are discussing and are using second hand opinions stolen from the internet to validate your replies.

Also physics has next to nothing to do with intake temperatures. Thermodynamics is the term you are looking for.

Massively over condescending post I know, and I'm sorry if it causes offense. But your comments have annoyed me, this filter setup is something which myself and others have spent a fair whack of time and a small amount of money researching and fitting with great benefit. All we're trying to do is share this information with others so that they can benefit from it; please don't rubbish it with your irrelevant statements.

To conclude; this filter setup is great and will not raise your IAT's given a reasonable intercooler. I would imagine (but cannot prove) that the twin side mounts on an S3, or the single side mount on an A3 would be more than up to the job with this filter as they are with a Jetex.



-

Shaun, the Jetex and a heat shield was an upgrade on the stock airbox which I binned years ago. I have been very happy with the Jetex for over two years, but I needed to replace the filter and wanted to try this based on the recommendation of Bill at Badger 5.

 

[Prawn]

The colder the air entering the filter the colder it will be in the inlet port pure and simple, this makes no differance whether it has gone through a turbo or not.

Forgive the abusive bunch above.

Technically, I'd agree with all of the above. Air entering the turbo will be heated up, and the colder it comes in the colder it'll come out.

I think though, in the case of these engines, it's been shown through extensive dyno testing that the improvements in flow from fitting these kind of filters outweigh the negatives of increased intake temps when compared to panel filters and cold air induction kits.

The KKK BW turbo's fitted to these engines tend to run very hot anyway and pump out a lot of hot air, so in real terms, a few degrees gained from a cone filter won't make any difference. Intercooler efficiency is a far bigger deal.

Not that I care anyway, I have methanol injection to make up for all of that crap

 

[paultownsend]

@ jardo. What size reducer did you use? If the internal diameter of the filter is 80mm, won't the reducer need to be something like 86-70mm?

 

[16Klappe]

@ jardo. What size reducer did you use? If the internal diameter of the filter is 80mm, won't the reducer need to be something like 86-70mm?

I purchased an 80mm; which was far too small. An 86>70mm would tighten up perfectly.

On an S3 you can simply press the filter on over the MAF and use a STRONG clip to clamp it.

 

[ShaunS3]

This filter setup is something which myself and others have spent a fair whack of time and a small amount of money researching and fitting with great benefit. All we're trying to do is share this information with others so that they can benefit from it.

This is the forum spirit we like to see. Top man!

 

[paultownsend]

Looking at Benjamin's pictures, the filter is so long it won't accommodate a silicone reducer!

(Mine is an AGU so 70mm maf)

may pikey it with a 70mm silicone coupler on the maf. 5mm thick silicone on the maf = 80mm!

 

[16Klappe]

I have a reducer, fits fine

 

[Prawn]

Paul: ko4 setups sit closer to the wing generally, as the ko4 turbo sits over to one side more than a ko3/s, hence the extra room

 

[phil miller]

Im with Prawn, METH for the WIN

I think this is a perfect answer to sorting an air filter, thats the one item i havent sorted and as mine goes in for mapping in less than 3 weeks i was getting worried, Jardo had told me not to worry and he had a plan, the plan being this filter, so monday morning i will be ordering up said airfilter, so with our 30% discount with GSF im hoping for it to be around a tenner BARGAIN

 

[BENJAMIN]

Ben - can I get this added to the list of things to do on Tuesday...?!

No problem, I'll get one ordered up for you monday Erf.

 

[sam4191]

Just a thought on this one... does this mean that a 'performance' filter for the s2000 would possibly give even better results?

 

[16Klappe]

I would imagine not; you'll find that the benefit of this over a Jetex or PiperX is the velocity stack and smooth inlet.

The filter element itself would not make much difference; fitting a filter rated for 400bhp will not give benefit over a filter rated for 300bhp if your engine is only making 270bhp.

If that makes sense at all.

 

[sam4191]

Aha.. yeh that makes 100% sense! cheers

 

[Routledge]

I love a pikey mod or two sometimes, but that colour scheme looks truly AWFUL, haha.

Nice idea though and by the sounds of things a noticeable difference (if only in woosh and genreal noise) for not a lot of wonga.

Good spot, Ben.

 

[superkarl]

The fact it has a velocity stack is because its so wide at the base right??

So an aftermarket replacement for an s2000 might be the same. It will probavly be the same structure to fit the hondas airbox, only the element will be different.

Someone buy one.... Lol

 

[Sam_]

Not sure what the hype is about? Sure it's got a velocity stack, but so do many filters? 42dd do a very nice billet kit as does Bill. At the end of the day, it's still paper by the looks of it, so it'll need replacing at service, whereas cotton gauze can just be washed.

 

[Sam_]

K&N do an S2000 filter:

E-2435 - K&N Replacement Filters, Replacement Air Filter

So do CT-Engineering (foam):

CT-Engineering Replacement Air Filter for the 2000-2009 S2000 | eBay

And it's the NAPA branded filter that's red:

Wix 42726 & Napa 2726 Air Filter: FleetFilter Secure Online Store

.... anyhow, this is a proper S2000 inlet (perhaps with slightly longer trumpets):

 

[16Klappe]

Paper filters>foam/gauze filters for filtration. Synthetic filters are cack.

This idea came around (for me) after Prawn and all the SSS boys went and bought these HUGE foot wide 80mm Piper X foam filters and started taking stupid pictures of their MASSIVE air filters. Bill commented that they were **** and nobody noticed. I pinged him a PM saying that I was after a TIP and filter for a friend and a filter for me and why didn't he recommend the Piper X. He offered me an S2000 filter he had intended to test for years and explained his hunch to me. Thats what got me onto it.

You could almost buy five years worth of these filters before you covered the cost of a Jetex. And that is a huge part of the appeal to me; it is no more expensive than a standard air filter from GSF and can be bought off the shelf. So for those of us who want a cheap performance increase without the expense of a Jetex or similar it is spot on.

We are fitting one to Phils 300bhp spec K04 A3, where flow is everything. That will be the real test.