K&N Filter development (warning - some big pictures)

**Posted:** Wed Mar 16, 2005 6:44 pm

They do the panel replacement filters and oil filters - what are moaning about :wink:

Pedro,

Have a look here: (Anyone with a 323F V6 thinking about entering your details? - I've already enquired about a filter for the 323F V6 on behalf of the club

).

http://www.knfilterchargers.com/search/vehicle.aspx?V=W

Mark

**Posted:** Tue Mar 22, 2005 12:55 am

Mark.T wrote:

Mark

nice

does that pipe go intothe resonator box or am i looking at wrong thing?

**Posted:** Tue Mar 22, 2005 8:40 am

No, the resonator box is completely bypassed (it'll be removed (again) next time I take the bumper off). The pipe tucks into a handy slot in the plastic engine undertray. The open end of it then faces forwards under the car and ducts cold air to the engine bay. As you can see, I have a bit work to do to make it more efficient. It will be routed via an intake in the front bumper (bigger than one I already have).

I've been looking at tuning the intake tract (or runner length) and there is a definate correlation between the length and performance. So I won't be re-connecting the blue end to the filter.

Mark

**Posted:** Tue Mar 22, 2005 1:14 pm

do you mean to before the filter or after the filter?

**Posted:** Tue Mar 22, 2005 1:50 pm

From what I understand, it's the whole length, from inlet valve to the end of the inlet path (after the filter) - which makes sense if you know anything about transmission line theory and wavelengths (Tom - you should have an apreciation of this) - there's probably other fields that have similar concepts related to them.

I've got to look a bit further into it as there's some issues I want clarify.

Mark

**Posted:** Sat May 21, 2005 1:38 pm

Mark.T wrote:

My car spent a day and a half in the hands of the K&N development department and their new 1200BHP per axle rolling road in Warrington this week. Their purpose was to develope a 57i induction kit for the 1.8 BA.

I had to re-install the OEM intake system (remove front bumper etc, re-install resonator box and pipe etc - thanks to Shaggy for the help) so that they could compare the standard system with their open air filter and their enclosed Apollo Universal 'kit'.

Here are the results:

Standard intake vs 57i kit (BHP at the wheels)

Standard vs 57i kit (Torque at the wheels)

Standard vs Apollo kit (BHP at the wheels)

Standard vs Apollo kit (Torque at the wheels)

57i vs Apollo kit (BHP at the wheels)

K&N were good enough to leave the Apollo kit in for me (FOC

):

The guy at K&N and I were dicussing the effects of changing the lengths of the intake tract on performance. I'm sure this is to do with pulse tuning and standing waves set up by the valves opening and closing, similar to the exhaust pulse tuning theories. He said they sometimes put resonance chamers in to compensate for the change in length that some of their kits add - similar to those that the '94-'96 BA's have as standard. With this in mind I'm experimenting with the Apollo 'unsealed':

I'll be moving the of the direct cold air feed pipe to a position whereby it duct air towards the end of the filter but not actually attach to it. The other end will be placed in the front bumper similar to my old set-up. I have theories that I'm experimenting with (mwahhahaha :wink:

). Doing this also avoids 'issues' assiciated with driving through deep puddles.

This shows where K&N terminated the DCAF pipe (it's also a known method within the 323F comunity):

Mark

only 90 BHP from the wheels on a 1.8 GLX!!!!! Wheres the extra 25 BHP gone? unlucky!

**Posted:** Sat May 21, 2005 5:59 pm

115bhp is at the flywheel

**Posted:** Sat May 21, 2005 9:40 pm

It's still poo, but Pedros' right, 115 is at the flywheel. I have engine issues, but the graphs still show the effect.

**Posted:** Fri Jun 24, 2005 5:25 pm

I'm Famous - or rather, my engine is (I wish I'd cleaned it before I took my car to K&N!). I have, in my living room, I beleive, the very first Mazda 1.8L BA K&N 57i indution kit

- and my engine bay features in the many pictures within the fitting instructions!

Mark

**Posted:** Fri Jun 24, 2005 5:35 pm

so can i get one of these induction kits? and how much?

**Posted:** Fri Jun 24, 2005 5:52 pm

Any K&N supplier should be able to get it (the one I have was given to me for a club event by K&N. Model number on the box is: 57-0630 but the 1.8 or the stock number aren't on the K&N web site. I'll email K&N and find out more. Expect the price to between £70 and £110.

They look like this: The filter part, not the plastic thing on the left)

Mark

**Posted:** Fri Jun 24, 2005 6:33 pm

what do they sound like with just the filter on? i really want a full induction kit, with the air pipe from the front bumper if you know what i mean?

**Posted:** Sun Jul 10, 2005 5:50 pm

The K&N induction kit for the 1.8L is now listed on the K&N web site:

http://www.knfilters.com/search/product ... od=57-0630

Mark

**Posted:** Sat May 27, 2006 2:12 pm

is the apollo a direct replacement or do you need to get some sort of collar to fit it to the intake?

i'm also thinking of getting the normal k&n induction kit as well -so with the apollo and the other kit i should have all the piping and everything else i need right?

or am i missing something? (i usually do - hehe)

**Posted:** Sun May 28, 2006 12:12 pm

The 57i kit is designed for the 1.8 BA, the Apollo is a universal fit. I don't know what comes with the Apollo kit, but I'd assume, between the 57i and Apollo kits, you'd have everything you need.

Mark

**Posted:** Sun May 28, 2006 11:35 pm

For the apollo (at least on the 2.0) you'll just need a connector but I can't remember the size so I'll have a look tomorrow. Or just measure the size of the 1.8 intake (where it meets the airbox) and I'll let you know which connector you'll need.

Not quite sure why you would want to buy both kits? Planning a twin turbo conversion?

**Posted:** Sun May 28, 2006 11:52 pm

"Or just measure the size of the 1.8 intake (where it meets the airbox) and I'll let you know which connector you'll need."

great plan - one small problem

i dont actually own a car yet - hehe

**Posted:** Mon May 29, 2006 12:06 am

Are you building it bit by bit then? :badgrin:

**Posted:** Mon May 29, 2006 12:11 am

well, the plan is to get one and have it "completely" modded within 1 month

so just trying to make sure i get all the bits i need when i start ordering - as i dont really have much of a window for errors in ordering

**Posted:** Tue May 30, 2006 11:02 am

Barelyhuman wrote:

well, the plan is to get one and have it "completely" modded within 1 month

well i guess u have one hell of a budget.
on the other hand, whats completely modded?
ask rich i dont think his will ever be :bigsmurf:

post some nice pics int time

**Posted:** Tue May 30, 2006 11:06 am

i meant completely - as in, all the mods i want at the mo - but it's still just above 1k at the mo

But i have almost a £5k budget (but that is car - insurance - mods)

Then after a little while i'll do all the other stuff i want - new exhaust - lowered and a front mod. - probably do this on a monthly basis

**Posted:** Thu Jan 18, 2007 12:28 am

For some reason the pictures dont work... They've worked 2-3 weeks ago...

**Posted:** Thu Jan 18, 2007 12:33 am

mark changed ISP so has temporarily lost the pics :thumbright:

**Posted:** Thu Jan 18, 2007 9:10 am

Yep

I'll put them on the club323f server ... if you don't see them then, we have bigger problems

Mark

**Posted:** Thu Jan 18, 2007 12:44 pm

Ok, still waiting for the pics, I need them to make point to my friend who says that there's no performance increase with those type of airfilters...

Thnx

**Posted:** Thu Jan 18, 2007 1:30 pm

I'll try and sort it out when I get home this evening

Mark

**Posted:** Thu Jan 18, 2007 2:55 pm

if you have any problems mark let me know as i have the original plots in my car box - i think there is a scanner in my house :thumbright:

**Posted:** Thu Jan 18, 2007 10:01 pm

Cheers Matt

Mark

**Posted:** Thu Jan 18, 2007 10:12 pm

There we go :thumbright:

Mark

**Posted:** Fri Jan 19, 2007 11:46 am

Thnx a lot! :cheers:

K&N Filter development (warning - some big pictures)

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