Cone Air Filter Options (Hybrid)

[S3AMJ]

Good morning everyone,

I’m looking for some advice on a good option for a cone air filter. Now I know the main brands (K&N, Green Cotton, Jetex, etc) but what are people’s experiences? Preferably one that comes very lightly oiled.

I’m looking for the biggest I can fit in the space I’ve got now I’ve relocated the battery, I intend to add some air duct as well to that area. I’ve seen a few examples from a few members. If anyone can point me in the direction of part numbers as well would be a huge help. Once I’ve got the cone air filter I’m going to use, I can then put my Oil catch can in it’s finally resting place.

Thanks in advance,

Ash


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[<tuffty/>]

Jetex....

<tuffty/>

 

[S3AMJ]

Jetex....

<tuffty/>

Hi Tuffty, which one do you have? Forgive me if it’s documented in your build thread. I intend to do the same as what you’ve done and run it right down to the headlight, using the OEM battery cover and air box to “hide” it.


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[badger5]

80mm neck for your maf, and choose the biggest you can find to fill your space.. www.jetex.co.uk a make we use on k04 cars

 

[S3AMJ]

80mm neck for your maf, and choose the biggest you can find to fill your space.. www.jetex.co.uk a make we use on k04 cars

Thank you Bill, I’ll check out what’s available with the 80mm.


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[S3AMJ]

Seems there is only one option suitable from Jetex in 80mm rated to 410bhp. Which I’m sure will be fine for my application requirements..... however I was looking for something much bigger!

Is it ill advised to get a 125mm ID neck filter and reduce it down to 80mm via something similar to a velocity stack?

This is my thinking....

Get this - https://www.jetex.co.uk/cone-filters/125mm/ Which is rated to 490bhp

And mating it to this -

Reducing the step nicely.

With an 80mm 45 degree silicone elbow to my MAF.

This might be completely overkill or dam right mad....


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[<tuffty/>]

The Jetex Bill uses on any k04... https://badger5.co.uk/induction/jr-blue-air-filter-70mm-or-80mm-available-blue-70mm-neck

Mines a 100mm neck and substantially longer

<tuffty/>

 

[S3AMJ]

The Jetex Bill uses on any k04... https://badger5.co.uk/induction/jr-blue-air-filter-70mm-or-80mm-available-blue-70mm-neck

Mines a 100mm neck and substantially longer

<tuffty/>

Cheers PT I’ll put an order in soon. Keep it simple I think rather than my elaborate way of complicating things and “trying to be different” approach haha.


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[JonnyDerv]

From my experience, k&n are absolute gash filters. I lost two compressors wheels to a k&n filter from fragments getting through (no it didn’t have any holes lol). Jetex was good quality and seemed a decent filter. That would be where my money would go.

 

[scotty_24]

Jetex FR08001

 

[Stuart B]

Who needs filters?

In all honesty I have a cosworth s2000 air filter and will be getting a JR / Jetex as adviced by our forum experts. So it will be a good comparison. I reckon the current s2000 filter will manage 250g/s I had 225g/s readings via me7logger on my s3, whether that was accurate or not? Meh... I can only report the readings, and then I turned it down

So when I get the new filter I will log a like for like.

 

[S3AMJ]

Thank you all for your advice, I’ll be going Jetex without a doubt now. 80mm neck is limited to 1 option which is “rated” to 410bhp again this is probably sufficient. But if I jump up to 100mm neck, then that open to 2 more options. One “rated” to 438bhp which probably doesn’t warrant the adaptions, etc over the 80mm neck one for an extra 28bhp “rating”

However there is a massive one “rated” to 834bhp haha, which would fill the area I intend to put it! I’ll make my final decision once I’ve measured everything up physically to see what I can actually fit in there. It will be heat shielded from the engine..... just begs the question, is bigger better than what your engine is likely to produce.


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[Tj 0785]

But wouldn’t the 834bhp one only be rated to that on the basis the 100mm is going to a 100mm intake and not reducing to 80mm on the neck.

 

[Stuart B]

I am loving the precision in the estimated BHP rating.

 

[S3AMJ]

But wouldn’t the 834bhp one only be rated to that on the basis the 100mm is going to a 100mm intake and not reducing to 80mm on the neck.

Good observation TJ, not sure to be honest! Jetex seem to be the only company that actually give that sort of data.


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[S3AMJ]

I am loving the precision in the estimated BHP rating.

Yeah they’ve got that nailed.... haha, I mean surely if you’ve got a big *** filter like the 834bhp and had a 1000bhp car, it’d still cope........ Or do you have to have two?! At this rate I might have to weld a sidecar to house it, all in the aid of science.


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[Tj 0785]

The power would be calculated on a 100 right through it’s the same as pump sizing at work the lph of a pump would be calculated with a certain size pipe say 2” if I reduced down to 1” on the outlet instead it wouldn’t make them numbers won’t make no difference to you like as it’s more than enough for what you will need