A Different Air Filter Debate (LCR/LC)...

[JamJay]

Hi all! Not your usual panel filter vs open cone here, I want to compare two kinds of open-cone.

Story short, logs back in August revealed that my MAF was under-reading and I suspect one of two reasons...dodgy MAF and restrictive open cone. I use a Neuspeed filter and from day one it's never impressed me, I think it's under sized and therefore quite restrictive. Once this is replaced, I can determine defintely what the problem is (and probs replace MAF for good measure).

So i'm getting rid for a larger cone or a slightly smaller twin-cone. Which would be best?

JETEX 08001: http://www.jetex.co.uk/website/conicalfilters.php?insided=80mm

Green Powerflow: http://www.green-filter.co.uk/product_info.php?cPath=622_762_763&products_id=100360

Reading Demon-Tweeks (although they only do 85mm neck), a 200mm twin-cone filter is rated to 301bhp where as the JETEX is 400bhp. Now, on a stage 2 car, it's getting close to 300bhp so is buying a twin-cone pointless? I can't help thinking that the design of the twin-cone will really help as out air feeds will be blowing directlt onto the centre of it.

Any thoughts from you lot? Have you had experience of both? What are your opinions?

Thanks,

J

 

[ibizacupra]

unless you can confirm how each manufacturer calculates their bhp claim you can only go on relative surface area between them I think.

 

[JamJay]

Thanks Bill.

So JETEX is 172mm in length, OD Bottom 175mm and OD Top 140mm.

Green is 200mm in length, OD Bottom 140mm & OD Top 120mm.

Which would you choose? I really have no idea.

 

[Willie]

As Bill said, how can they quantify what air flow will give a certain BHP on different applications???

I've just bought the dual cone Green. This has more surface area to suck in cold air so I'm hoping it will be good.

 

[traumapat]

Jetex has some good reviews on here and its been fine on mine but im sure the green version would be good too.

No help then really

Id go for the highest rated power wise.

 

[JamJay]

To throw another spanner into the works, there are also these metal filters going about but I have no experience with them or know anyone using one.

 

[andycupra]

from what i know, avoid metal filters. My understanding is that their ability to filter is not up to that of cotton oiled filters.

surface area of filter is the key.

 

[andycupra]

Thanks Bill.

So JETEX is 172mm in length, OD Bottom 175mm and OD Top 140mm.

Green is 200mm in length, OD Bottom 140mm & OD Top 120mm.

Which would you choose? I really have no idea.

on those dimensions the Jetex has a surface area about 4% larger than the Green.

 

[JamJay]

I've been having a chat with JETEX themselves as they too offer a twin-cone. It seems that the whole surface area thing is, as you say, the key where as a smaller twin-cone, even with it's open front, can't handle the same.

I made a huge hint for them to make a massive twin-cone though

By the way, the 08001 is out of stock until mid next week.

Anyone with any more infor/experience with a twin-cone?

 

[ibizacupra]

on those dimensions the Jetex has a surface area about 4% larger than the Green.

You cant say that without knowing pleat depths

 

[ibizacupra]

I've been having a chat with JETEX themselves as they too offer a twin-cone. It seems that the whole surface area thing is, as you say, the key where as a smaller twin-cone, even with it's open front, can't handle the same.

I made a huge hint for them to make a massive twin-cone though

By the way, the 08001 is out of stock until mid next week.

Anyone with any more infor/experience with a twin-cone?

not out of stock with me