Forester 03 air filter

[Mick MacRobb]

Good morning, im just starting to set up my 03 forester and wont to do sumthing with the air filter, im keen to eather modify or do away with the standard arangment, whats avalabel out of a box, wher do I get it from , also iv read about snorkels are ther eny more impruvments or dedicated snorkels out ther at present.
Regards
Mick
East Gippsland.

 

[Robbks]

Welcome aboard Mick.

Personally, I'm a fan of retaining the factory air-boxes, they flow well and standard filters are cheap and easy to get.
Plus NA intake tuning is a bit fragile when it comes to changing pipe lengths/ diameters, etc

Which engine does yours have? MAP or MAF sensed?

But either way, a good solution to keeping the intake clean and dry is to use some new piping (rubber, silicone, steel, alloy or PVC) from the standard airbox, into the inner-guard and then point it rearwards right back to where the drivers door opening is.
you're very unlikely to suck in water from this point unless the car is submerged up to the windscreen,
and it's a good source of nice cool air

 

[Ratbag]

Gidday Mick

to the ORS forum mate.

Your engine has a MAP sensor. It will be an EJ-251. The later EJ-253 has a MAF sensor.

I agree with Rob - do not muck around with the intake manifold danglies or the pre-filter chamber. These are tuned like a fine musical instrument and changing them can (will ... ) cause your engine to run like a pig.

They are there to create the right kind of turbulent flow into the combustion chamber/cylinder, and also to prevent the wrong kind of flow, either laminar flow or standing waves in the inlet manifold system.

 

[Mick MacRobb]

Thanks for the info, il be looking at taking the sume pipeing back towords the door , iv just had a new zorst pipe fited, no more rateling from inside stufed baffles , and a beter boxer note as well!

 

[NachaLuva]

Hey Mick, one more to agree, keep as much factory as you can. There aren't ant Subaru specific snorkels but several fit the Forester nicely. I have the NH-NK Pajero snorkel on mine, very happy with it. Just needs a little bending to make it fit perfectly, write up on it here:DIY Snorkel Installation

Or Robbks's suggestion is effective too.

 

[Mick MacRobb]

Lyn just looked over my sholder at the snorkel idear, and sead your not doing that to the car , im not driving around with sumthing like that on the car !

 

[NachaLuva]

Lolol, try the guard piping then :iconwink: