PDA

View Full Version : Cold Air Intake - Advice



Allegiance
21-10-2010, 07:45 PM
Has anyone looked at changing the intake yet? It looks very restrictive. I can't find anything online that has been developed. I don't know how confident I would feel trying to make a custom one.

Anyone have any advice?

Hail22
21-10-2010, 08:40 PM
I would give it a few months mate, i reckon HKS and a few other Intake brands will start developing for 1.2-1.8 litre European cars.

For such a nice car i wouldn't like to play with fire and make a custom one...but we are human if you want to give it a shot, go for it :)

matty
21-10-2010, 09:02 PM
i thought of buying a pod and just whack it on a right angle piece to aim it at the grill. then make a box to hide it

Billecartz
21-10-2010, 09:20 PM
Has anyone looked at changing the intake yet? It looks very restrictive. I can't find anything online that has been developed. I don't know how confident I would feel trying to make a custom one.

Anyone have any advice?

Call Derek at European Autotech in Sydney, I am sure he will sort something out for you. I am going to see him tomorrow about gear for my Polo and TTS.

Buller_Scott
21-10-2010, 10:58 PM
hey guys, this is a topic that interests me.

if anyone's done some reading in the diesels section, you might have come across the ''let the tinkering begin/ continue/ get serious!" threads by forum member greg roles. even though it's a diesel, many of the things he's doing does apply to all cars. one of his first priorities was to optimise the air flow setup, as the stock setup was simply too restrictive. regardless of where the turbos are on what kind of engine, i think that minimizing bends, and increasing air flow, must be a priority.

i went nuts with my graphic artist skills tonight. as far as i remember from my test drive of the pog tsi 1.2T, this is what i remember the engine bay looking like:

http://i846.photobucket.com/albums/ab28/buller_scott/polo%20engine%20bay/screen-capture-2.png

however inaccurate that may be, i DO remember looking into the engine bay and immediately thinking that there's 270 degrees of bends between the front grille and the intake, that simply dont need to be there.

which prompted me to think that this might be a good solution (especially if you could get a good paper media pod filter like an AEM or an A'pexi):

http://i846.photobucket.com/albums/ab28/buller_scott/polo%20engine%20bay/screen-capture-3.png

the only thing that would prevent one from going out and doing this setup (because it would be easy to diy, and cheap), would be the last little hose leading into the intake- it looks like all hoses/ clips/ intake mouths are built for one another, i may be wrong, but i wouldnt want to undo the last little pipe leading into the intake, only to find that the only kind of hose that will fit in there/ clip into position, is a vw oem part....

food for thought :D

p.s. if any of you are wondering why my photos are so crap, i've used a combo of a website building program + a screen capture widget, and i got careless because its midnight and i've just spent 6 hours detailing someone elses car, haha

Allegiance
23-10-2010, 04:17 PM
I took some actual photos today:

http://img254.imageshack.us/img254/3461/dsc6126.jpg

http://img221.imageshack.us/img221/4066/dsc6129.jpg

I noticed the main inlet from the grille is very limiting.

This is with the pipe removed:

http://img219.imageshack.us/img219/9601/dsc6142.jpg

Closeup:

http://img696.imageshack.us/img696/5968/dsc6140.jpg

This area in red is where the intake pipe sits, the photos didn't turn out the best but that is plastic there, not straight in from the grille, the air inlet is underneith.

http://img821.imageshack.us/img821/4518/dsc6142red.jpg

Here is a picture of the pipe:

http://img143.imageshack.us/img143/9362/dsc6134.jpg

And back in place, as you can see it sits over the plastic, and the gap below it is where the air comes in from the grille:

http://img89.imageshack.us/img89/6984/dsc6125.jpg

I would think having a setup similar to what Buller_Scott has drawn would make a huge difference.

Allegiance
23-10-2010, 06:50 PM
Do you guys think this would work?

57S-9500 - K&N 57i Series Kits, Performance Intake Kit (http://www.knfilters.com/search/product.aspx?Prod=57S-9500)

Or should I wait for APR or similar?

Transporter
23-10-2010, 07:16 PM
I wouldn't use K&N filter, sorry.

Wait for APR.

Sent from my HTC Desire using Tapatalk

Allegiance
23-10-2010, 08:05 PM
I wouldn't use K&N filter, sorry.

Wait for APR.

Sent from my HTC Desire using Tapatalk

That's sort of how I felt as well.

Fixxxer
24-10-2010, 08:42 AM
Nice photos.
They tucked the intake up to the grille and above that flap area to stop any chance of water or stones/other junk from getting into the intake.
Not much space to do much, I imagine that even trying to fit a pod fliter would be difficult due to the space contrainsts? How much room is there?
Also, that pipe into the turbo inlet is tiny! It looks like a small radiator hose!

Fixxxer

Allegiance
24-10-2010, 02:18 PM
Nice photos.
They tucked the intake up to the grille and above that flap area to stop any chance of water or stones/other junk from getting into the intake.
Not much space to do much, I imagine that even trying to fit a pod fliter would be difficult due to the space contrainsts? How much room is there?
Also, that pipe into the turbo inlet is tiny! It looks like a small radiator hose!

Fixxxer

Yes it is very tight, I am not sure how fitting a pod would go...

Echizen
07-11-2010, 09:42 PM
Hi all, here is my intake:

http://www.vwwatercooled.com.au/forums/images/imported/2010/11/IMG_04101-3.jpg

Allegiance
07-11-2010, 10:16 PM
Hi all, here is my intake:

http://www.vwwatercooled.com.au/forums/images/imported/2010/11/IMG_04101-3.jpg

Cool! Still looks like it has a few bends... Noticeable difference? How much did it cost? Where did you buy it from? Was it custom or actually made to fit into the 1.2 tsi?

Allegiance
07-11-2010, 10:21 PM
Actually I found this thread:

Intakes and Exhausts - APDrive - Page 5 - VAGSG Community (http://www.vagsg.com/forums/showthread.php?p=593085)

Is that your car? Colour looks the same!

Echizen
08-11-2010, 12:58 AM
Actually I found this thread:

Intakes and Exhausts - APDrive - Page 5 - VAGSG Community (http://www.vagsg.com/forums/showthread.php?p=593085)

Is that your car? Colour looks the same!

Yes that's my car. Better pick up noticeably from mid-high end. Cost me 400+SGD . Got it from apdrive. Mine was the first polo to be fitted with itg locally so you can say that it's custom fitted.

Greg Roles
08-11-2010, 05:21 AM
I'm gonna ponder this today, but agree Scott is definately on the money. What's the chances of moving the battery back, or drawing air from the passenger foglight shroud area?

Allegiance
08-11-2010, 04:41 PM
Don't think you could move battery, it is well secured. I have the sports pack so I use both fog lights... Or did you mean somewhere else?

Transporter
08-11-2010, 05:20 PM
He probably thought, to relocate the battery to the boot.

gldgti
08-11-2010, 06:21 PM
Also, that pipe into the turbo inlet is tiny! It looks like a small radiator hose!

Fixxxer

The turbo inlet is also tiny. If ther must be a bend before the compressor inlet, theres merit in keeping the pipe diameter smaller, as it keeps the air velocity through the bend high, which keeps flow into the compressor happy when its spooling (coming on throttle). This is a design feature vw have employed to improve "driveability"

noone
13-11-2010, 04:35 PM
It might be worth measuring the pressure drop as was done on the last Polo...
I can see what you are saying and that the flow looks restricted, but if you test it you may see that the intake is not overly restrictive and that cash could go elsewhere...

From memory, it was the MAF that posed the biggest restriction in the last Polo GTI.