2.0tfsi viable alternatives to the use of the factory airfilter box.

Charlie Farley · Dec 9, 2017

As in the title really chaps.
I'm messing around with intakes at present and having had a good old snoop in the interwebby there is not really much on the subject other than a few aftermarket kits , there seems to be very little else owners have tried to use in conjuction with cone type filter setups that keep a good flow of cool air to the intake.
It seems to me that if using a cone type setup with a the air box removed one needs to utilize as much of the available intake and air intake points as possible to help reduce any heat soak etc, whilst providing good air flow.
So as there are two air intake points , the first from the front grille which cant really be changed much , and , the second from under the front wheel arch, this normally goes into the air box from the outside edge butted up to the inner wheel arch.
My thinking is this, with the airbox out of the way , one only needs to fabricate a diverter fitting that attaches to the wheel arch intake point and thus the air from it can be directed over the cone filter or whatever is used.
It goes without saying that a better functioning heat shield is needed to keep as much heat away from that area.
So then chaps, any thoughts on this and also downsides to it.

Cheers
Rob

DieselJake · Dec 9, 2017

Relocate to the front grille same height/location as stock (or use the original intake), reason it is where it is rather than being in the wheel well or somewhere closer to the ground is to prevent hydrolock and provide the best air flow from the front of the car.

i3oricua · Dec 10, 2017

This is my setup. You have to buy some piping and couplers and just kind of eyeball it. You’ll need a hacksaw too for cutting the piping.

I do have a different pipe now. Custom made which leaks less.

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Charlie Farley · Dec 10, 2017

that look's the business, how does it connect to the grille area.

i3oricua · Dec 10, 2017

Just Rob. said:
that look's the business, how does it connect to the grille area.

What do you mean? It doesn’t connect to the grill at all. Just straight to the turbo and routes down the empty space next to the A/C accumulator.

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Charlie Farley · Dec 10, 2017

So where exactly is the air filter located now then, I was thinking of having the filter located where the airbox normally goes and then fabricating something to channel the incoming air to it thus giving the air filter a bit of protection .

Dani_B19 · Dec 10, 2017

As you've said Rob there is little on the market for the b7.

So either do what I've done and rip the gubens out of the air box, fit a panel filter and a silicone turbo intake pipe (I've also wrapped the heat shield in gold reflective tape)

Or

Go for a cone filter and fabricate a heat shield.

Next year I'm looking to change to a cone filter so will be buying some thin aluminium and fabricate a shield, then attach the grille feed to the shield and I'll also buy some air ducting to help route the wing feed.

maxdrz400 · Dec 10, 2017

Like Dani says, i think its best to attempt to fabricate a shield/box out of sheet ally, I've been meaning to get round to trying for ages. I was going to try and aim for something similar to the kits on ebay (bsr i believe). I reckon that type of thing with some cut door seal along the top would help keep it pretty oem looking.
One of my friends spent about £450 on an aem intake for his mini, and that was sheet ally with door seal on the top, i couldnt believe it!

i3oricua · Dec 10, 2017

I think this is more along the lines to what you guys are looking to do.

Modified Air Intake - The Noise and Performance people look for with a factory look.
https://r.tapatalk.com/shareLink?sh...om/forum/showthread.php?t=759781&share_type=t

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Charlie Farley · Dec 10, 2017

Dani_B19 said:
As you've said Rob there is little on the market for the b7.

So either do what I've done and rip the gubens out of the air box, fit a panel filter and a silicone turbo intake pipe (I've also wrapped the heat shield in gold reflective tape)

Or

Go for a cone filter and fabricate a heat shield.

Next year I'm looking to change to a cone filter so will be buying some thin aluminium and fabricate a shield, then attach the grille feed to the shield and I'll also buy some air ducting to help route the wing feed.

I'm already running the gutted airbox , flat panel air filter and 034 intake pipe but with my latest mods planned the air box has to be removed completely and a cone or similar type filter has to be used, I have no probs with that route , suits my purpose just fine but I want to ensure as much cool air gets to the filter and also keeping any heat soak to an absolute minimum, and still giving the filter as much weather protection as possible.
I suppose a lot depends on how much air is drawn in from the wheel arch , and weather that is the best point to get as much cool air into the filter area.

maxdrz400 · Dec 10, 2017

Just out of interest Rob, what next mod are you planning?
From my understanding, there is next to no benefit in opening up the air box other than for sound.

Charlie Farley · Dec 10, 2017

Its not for any gain in sound or performance , I need the space that the airbox is currently using....all will become apparent soon.

i3oricua · Dec 10, 2017

Just Rob. said:
Its not for any gain in sound or performance , I need the space that the airbox is currently using....all will become apparent soon.

I think something like what I have is more your style then since you need that space. Like I said you just need some piping and couplers.

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Dani_B19 · Dec 10, 2017

Will still need a shield Rob as the heat generate by that turbo will cook the filter, just think of the heat soak in stand still or slow moving traffic.

Charlie Farley · Dec 10, 2017

almost a case of fabricating some ducting with a 12v fan incorporated into it drawing in cool air into and over the airfilter.

i3oricua · Dec 10, 2017

https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.co.uk/ulk/itm/253302731724

?????

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Dani_B19 · Dec 10, 2017

There chap.

The filters too small and the heat shield is pointless. I mean just look at it. It doesn't seal against anything.

Charlie Farley · Dec 10, 2017

how big would you suggest the air filter needs to be Dani.

Dani_B19 · Dec 11, 2017

Check with your preferred manufacture for the bhp rating. Companies like jetex will tell you what each filter can flow and There for it' bhp rating.

eddie2602 · Dec 13, 2017

Rob, just thought I’d add my 2p as I know a little bit about your future setup (don’t want to give anything away). The intake I have can be routed 2 ways. The first is the way you have seen it in the bay and the second is how I have it routed at present in the location of the rh smic. It fits pretty snug in this location and is true cold air intake as the filter is right behind the fog grill, but obviously requires removal of the smics. Just food for thought

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maxdrz400 · Dec 13, 2017

Looks more like a cold water intake! What's the going rate on a rebuilt motor these days??

eddie2602 · Dec 13, 2017

maxdrz400 said:
Looks more like a cold water intake! What's the going rate on a rebuilt motor these days??

It’s not as low as it looks and I’ve driven through big puddles no issue with it in the 2 years it’s been routed like that

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maxdrz400 · Dec 13, 2017

Fair play if it works mate, and well done for thinking outside of the box. You're still a braver man than me, i would be too scared to try an intake that low!

carlcall · Dec 17, 2017

eddie2602 said:
Rob, just thought I’d add my 2p as I know a little bit about your future setup (don’t want to give anything away). The intake I have can be routed 2 ways. The first is the way you have seen it in the bay and the second is how I have it routed at present in the location of the rh smic. It fits pretty snug in this location and is true cold air intake as the filter is right behind the fog grill, but obviously requires removal of the smics. Just food for thought

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On the old FRS she had the filter in a similar place but on the N/S and we made sure we had a filter sock on to ensure that no water would get in. It’s not water proof but prevents rain water from getting into the filter.....which I could see happening in that set up when driving when it’s raining due to the air intake in front of it.

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carlcall · Dec 17, 2017

I also think we all know what he’s up to as we’ve seen all the requests for bits n bobs that are for sale

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eddie2602 · Dec 17, 2017

carlcall said:
On the old FRS she had the filter in a similar place but on the N/S and we made sure we had a filter sock on to ensure that no water would get in. It’s not water proof but prevents rain water from getting into the filter.....which I could see happening in that set up when driving when it’s raining due to the air intake in front of it.

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The filter itself is actually less than half exposed to what is coming in through the front grill due to the intercooler pipe and a big piece of plastic obstructing it. Driven through all conditions in 2 years of it being like that and it’s been fine. Rainwater makes no difference tbh you would need to completely submerge the filter to hydrolock the engine. On the other hand I understand why you might be concerned and so want to use a sock but they are an extra layer of restriction

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Charlie Farley · Dec 17, 2017

carlcall said:
I also think we all know what he’s up to as we’ve seen all the requests for bits n bobs that are for sale

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If I had put up too much info Carl i'd probably just got shot down again ......so wasn't worth the agro to be honest.

carlcall · Dec 17, 2017

You may find that significant moisture can get past the air filter because it was wet and cooled the MAF (which functions by being cooled by air and deriving the volume of air cooling it) which caused the MAF to report that the car had tons of air coming in so the injectors will throw more fuel into the cylinders. Yes your not going to get hydro lock as the water will be atomised and it will be minimal.....but i ran a sock and never noticed the difference running 365bhp+

At the end of the day it’s up to personal preference.....but for peace of mind it’s worth running one IMHO.

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eddie2602 · Dec 17, 2017

carlcall said:
You may find that significant moisture can get past the air filter because it was wet and cooled the MAF (which functions by being cooled by air and deriving the volume of air cooling it) which caused the MAF to report that the car had tons of air coming in so the injectors will throw more fuel into the cylinders. Yes your not going to get hydro lock as the water will be atomised and it will be minimal.....but i ran a sock and never noticed the difference running 365bhp+

At the end of the day it’s up to personal preference.....but for peace of mind it’s worth running one IMHO.

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Each to their own I suppose really, I’m not arguing with you as your points are valid but in my case I found the effects to be minimal. Good to hear about other setups anyway

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Charlie Farley · Dec 17, 2017

You guys are a wealth of knowledge and that's allways good to know, cheers chaps.

Jon13s · Dec 27, 2017

Following with interest. I'm in the process of collecting parts and the airbox/filter combo is pretty inconclusive.

Does anyone know the limitation of the standard setup? I only ask because I have read a couple of threads now where people cannot prove that a open filter is actually any better.

It'd be really nice to see some back to back comparisons.

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i3oricua · Dec 27, 2017

Jon13s said:
Following with interest. I'm in the process of collecting parts and the airbox/filter combo is pretty inconclusive.

Does anyone know the limitation of the standard setup? I only ask because I have read a couple of threads now where people cannot prove that a open filter is actually any better.

It'd be really nice to see some back to back comparisons.

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The stock air box is supposedly better since it protects from taking in hot air through the intake. Honestly I don’t care if I lose a whopping 2-3 HP from doing the cold air intake like this. I wanted the sound since a BOV wasn’t really a feasible idea.

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Jon13s · Dec 27, 2017

Thats fair enough. I guess that we really need to know the flow limitations of the standard setup and whether it strangles the car at anypoint.

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Nathan Russell · Dec 28, 2017

Im in the process of making something similar to this at the moment for my 3.0tdi. I’m pretty sure the stock vent that runs through the top of the grill gives decent airflow.

MPP · Dec 28, 2017

Nathan Russell said:
Im in the process of making something similar to this at the moment for my 3.0tdi. I’m pretty sure the stock vent that runs through the top of the grill gives decent airflow.

I'm looking forward to seeing that. I'm currently using a Ramair panel filter. The standard box does get good air feed from the grill.

Charlie Farley · Dec 28, 2017

looks good chaps but you don't have a very hot turbo and cat inches from the air filter location as on tfsi.

Dani_B19 · Dec 28, 2017

The problem is the standard air filter setup is a good setup. Has a large surface area and is fed via 2 high supplying air feeds. Im sure ivw seen somewhere thatbits rated for 350-400bhp. Can' rememer where though.

The only way to match/top it, is to have a high flow filter and well protecting heat shield or it' pointless as Rob has just stated. The turbo and cat are that close the air dragged in via a cone filter is pointless and will lose you power.

That' The reason I haven't changed mine yet, its trying to sort out an adequate heat shield.

DieselJake · Dec 28, 2017

I would like the same system as stock but bigger, if that's possible? If anyone has any ideas where I could aquire something like this they would be very welcome, may play about with increasing the size of the stock opening if not.

i3oricua · Dec 28, 2017

DieselJake said:
I would like the same system as stock but bigger, if that's possible? If anyone has any ideas where I could aquire something like this they would be very welcome, may play about with increasing the size of the stock opening if not.

https://www.uspmotorsports.com/APR-Carbonio-Carbon-Fiber-Air-Intake-Audi-B7-A4-2.0T.html

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i3oricua · Dec 28, 2017

Or

http://www.gwentvw.co.uk/product/apr-audi-a4-b7-2-0t-fsi-carbon-fiber-cold-air-intake-system

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2.0tfsi viable alternatives to the use of the factory airfilter box.

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