39 replies to this topic

[chickendippers]

Hi all,

 

Ok so pretty much the last piece of the puzzle for me when it comes to my engine build. After searching through the many threads on the topic and getting no definitive answer - I was wondering if someone could let me know what filter they're using on a 350+ bhp build please on the Z20? With all due respect, not interested in what works on a Z22 or standard Z20, but has to have been tried and tested on a Z20 running over 350bhp. 

 

Thank you muchly!

[fezzasus]

Why would a different engine impact the performance of a cone filter?

[chickendippers]

Because I'm asking for recommendations based upon a similar power and engine to me. Also as far as I'm aware, the Z22SE doesn't have an AFM.

[fezzasus]

Because I'm asking for recommendations based upon a similar power and engine to me. Also as far as I'm aware, the Z22SE doesn't have an AFM.

 

Read this: http://www.vx220.org...cda-air-filter/

 

General air filter guidance:

 

- Apexi is rated for high power but there are lots of fakes on the market and even with an original, the surface area is low so either has poor filtration or will restrict

- ITG enclosed unit has been used successfully here but is expensive, cheaper alternative is V7000 pipercross

 

Edited by fezzasus, 29 January 2016 - 02:31 PM.

[chickendippers]

 

Because I'm asking for recommendations based upon a similar power and engine to me. Also as far as I'm aware, the Z22SE doesn't have an AFM.

 

Read this: http://www.vx220.org...cda-air-filter/

 

 

Precisely, so an oiled air filter would be no good on a Z20 due to it causing issues with the AFM, whereas it would perform fine on a Z22.

Hence why I was asking for information from people that are running the Z20 engine as this gives me more reliable information about what will be suitable. 

[fezzasus]

 

 

Because I'm asking for recommendations based upon a similar power and engine to me. Also as far as I'm aware, the Z22SE doesn't have an AFM.

 

Read this: http://www.vx220.org...cda-air-filter/

 

 

Precisely, so an oiled air filter would be no good on a Z20 due to it causing issues with the AFM, whereas it would perform fine on a Z22.

Hence why I was asking for information from people that are running the Z20 engine as this gives me more reliable information about what will be suitable. 

 

 

My point is, as long as you're not looking at oiled filters, it doesn't matter what engine experience it's based on.

[chickendippers]

 

 

 

Because I'm asking for recommendations based upon a similar power and engine to me. Also as far as I'm aware, the Z22SE doesn't have an AFM.

 

Read this: http://www.vx220.org...cda-air-filter/

 

 

Precisely, so an oiled air filter would be no good on a Z20 due to it causing issues with the AFM, whereas it would perform fine on a Z22.

Hence why I was asking for information from people that are running the Z20 engine as this gives me more reliable information about what will be suitable. 

 

 

My point is, as long as you're not looking at oiled filters, it doesn't matter what engine experience it's based on.

 

 

Yes I can see what you're saying, however if an oiled filter works best on a Z22, there's no point in that being recommended for my set up. As well as, there's no point in someone with a standard Z20 recommending an air filter for their standard 70mm AFM, as I will be running a 90mm AFM.

[smiley]

Not that many stage 5 turbo owners around. Give the question some time.

[techieboy]

Dave Hardwick modified airbox and standard OEM panel filter.

[Nev]

Or consider fabricating your own air-box utilising 2 OEM air filters. This has 4 advantages:

 

1: The panel filters cost a mere £4 each to replace.

2: Building the air-box will be peanuts (IRO £10) from wood, or £20 from alu.

3: You can be assured that it will filter correctly.

4. It will flow very well.

 

For anything over circa 270 BHP you really need much more air than a single OEM Z20LET panel filter can flow. When I built my own air box (with 2 panel filters and 4" inlet pipes) I got a dyno evidenced 66 BHP (based on a 485 BHP engine making initially, made 551 BHP next time on a supposedly conservative and respected dyno).

 

If you follow this link you can see an example : https://sites.google.../07---update-23

 

HTH.

Edited by Nev, 29 January 2016 - 04:24 PM.

[tibby]

I have this one with my 400hp set up https://www.google.b...454171312823327 Sandtler / X air Supercompetition filter (dryflow without oil for your LMM) Inlet = 100mm outlet = 80mm Nice price if you take the alu version. ps: This filter = the same as Regelin Performance Germany uses in their Stage kits (But make sure you ask for the Supercompetition!!! the other is an wet type) http://www.regelin-p...ster-turbo.html

Edited by tibby, 29 January 2016 - 04:37 PM.

[tibby]

More info from Sandtler http://www.sandtler2...sportluftfilter

[Nev]

Tibby, just from looking at the number of louvres on that B1 filter (similar number as an OEM filter, maybe a few more), I would imagine it would not flow well enough for 400 BHP.

 

A couple of genuine questions for you to ask yourself about that filter:

 

1. What particle size is it guaranteed to filter down to...?

2. What is the pressure drop across the filter when you are sucking 400 BHP worth of air in...?

 

Edited by Nev, 29 January 2016 - 05:31 PM.

[tibby]

Hope you have more info with this link http://www.ts85.de/a...ion_(klein).jpg

[tibby]

Hope you have more info with this link http://www.ts85.de/a...ion_(klein).jpg My charger is only rated for MAX 420hp, so with 396 pushing out of it (still with an oem leh exhaust manifold) i think this is acceptable. For me, this filters flows enough for MY set up. Suppose for a Nipper set up , i also trow this one in the bin. Also, i clean it every half year (about every 2500 km) Intake tube is clean and not oily and that's what i want. Vmax Germany had also his doubt about this filter due to small. But i gained power with some simple add ons (rs4 lmm and 62 tb) and gained extra 20hp and +30nm). Same mapper,same rolling road, same time of the year. Think when this filter was restrictive, it showed less or none gains... But , the best filtering possible, is like yours or indeed the hardwick set up... I had this filter on my car when i bougth it in it's 324hp set up. Just upgraded it to an dry type for my 396 set up because i was happy with it. grtz

[Nev]

Nice to see some actual flow/particle figures (even though I can't understand the language). At least it shows the filter company paid some attention to the critical matter of what can get into your cylidners

 

[siztenboots]

It's more the erosion damage to the compressor wheel. Race engines do not have filters and some do big mileages

[Nev]

It's more the erosion damage to the compressor wheel.  

 

Thats dead true

 

[tibby]

I know, when putting performance filters on your car, the air sucked in, never will be as good like oem filtered air. I also understand this can happen to the compressorwheel ....



When my turbo's letting down, i upgrade to a better one. Probably duall scroll type's.

[chickendippers]

Or consider fabricating your own air-box utilising 2 OEM air filters. This has 4 advantages:

 

1: The panel filters cost a mere £4 each to replace.

2: Building the air-box will be peanuts (IRO £10) from wood, or £20 from alu.

3: You can be assured that it will filter correctly.

4. It will flow very well.

 

For anything over circa 270 BHP you really need much more air than a single OEM Z20LET panel filter can flow. When I built my own air box (with 2 panel filters and 4" inlet pipes) I got a dyno evidenced 66 BHP (based on a 485 BHP engine making initially, made 551 BHP next time on a supposedly conservative and respected dyno).

 

If you follow this link you can see an example : https://sites.google.../07---update-23

 

HTH.

 

Very useful info there, thanks for that Nev. So that's in your boot, rather than in the standard position? If so, I'll have to check what room is available as that's where I was planning on putting the meth tank