Cold air intake for $5

r4z0r84

r4z0r84

Member
I've saved the cost of this on fuel 10 fold, its random as hell but does work extremely well for the cost of it.

Things you need.

Plastic Funnel $2.50 and some Plastic tubing $2.50 from Bunnings warehouse/hardware store.
Gaffatape/duct tape, (any tape that seals air will do but cloth based is best)

Take out your stock air box, mine originally sucked from just right of the battery(hot air)
some cars have an extended air box that reduces the volume of induction sound, this is where you can put the funnel/plastic tube.

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stick the tube on the small end of the funnel and chop the funnel off at this point using your mothers favorite kitchen knife.
use the tape to stick the two together, use a cable tie to hold it to something on the car.

Direct the other end of the tube to your air intake, I have a cone filter so im delivering the air towards that. if you have your stock air box direct it to where it was originally sucking from (replace the part that reduces induction sound)
If you have a pod filter you can deliver it directly to the end

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The tubing i found had a series of holes all through it as it was designed to water plants so i ended up wrapping the entire thing with tape.

make sure the funnel has somewhere to get the air from and is facing slightly down so all water/rocks ect fall straight out.

mine is located roughly here
z7hYexl.jpg



This means you can have a cold air intake for $5 and save $$$ on long trips.


Tested fuel consumption on a highway at 110kmh for the distance of 70km that goes from Ballarat to Ballan and back to Ballarat.
to start off my car when it was completely stock is ment to use 5.2ltrs per 100km i dont drive like a granny and i thrash my car a fair bit so my fuel consumption for the 70km trip was 12ltrs.

Second test with cold air intake was 2.5ltrs im still quite shocked at how something so small and cheap could make such a difference, i also dont have to downshift going up hills anymore getting a lot better fuel economy out of my little 4cyl 1.5ltr engine.
 
Nice bit of research there, and very cheap CAI.

I do think you made bit of an error with your calcs.

@ 5.2L/100, and travelling 70kms, you will use only 3.64L not 12ltrs.

Still, 3.64L to 2.5L is a good improvement.
 
How much cold air do you reckon that pod is actually goin to take from that funnel/pipe setup?

Box it and you might notice a difference. Having it just flapping about isn't going to work
 
unclepaulie said:
How much cold air do you reckon that pod is actually goin to take from that funnel/pipe setup?

Box it and you might notice a difference. Having it just flapping about isn't going to work
Click to expand...

agreed, i tried running mine with the same setup (exposed pod) and had more intake noise but less response then i switched back to stock airbox with panel filter running the ducting pipe and now i have a bit less intake noise, but improved response
 
I'm planning on boxing it to get more gains already made up a wooden template for it, also contemplating going back to the stock intake as its a lot less work but i love the sound of the pod.

I did the mod originally as a joke but it does actually work due to the cold air(ambient temp air) in general is going to help compared to just hot engine bay temp. if its just inner city driving though i still have the same issue of the engine bay heating up too much and the performance goes horribly south, so im definitly going to be changing it to an enclosure rather than just naked.
 
I just got some sheet metal cut and bent up by the local metal shop and riveted it together for mine.


Maybe do something like this instead of wood.
My 2c.
 

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Pretty sure he said a template from wood.. Surely no wood would ever go in an engine bay
 
Aluminium is your friend and appreciating that this is a budget DIY build, you can find scrap sheel metal from people chucking out ovens, stoves, washing machines etc.

Without sounding like a garbage sniffer, I found nice perforated(and non perforated) metal sheets salvaged from oven trays people chuck out which are perfect for air baffles and boxes etc. Most importantly... free :p
 
Hugh-CE said:
Pretty sure he said a template from wood.. Surely no wood would ever go in an engine bay
Click to expand...
Yeah template from wood making it with aluminium haha the only fire i want in my engine bay is inside my engine haha
 
r4z0r84 said:
Hugh-CE said:
Pretty sure he said a template from wood.. Surely no wood would ever go in an engine bay
Click to expand...
Yeah template from wood making it with aluminium haha the only fire i want in my engine bay is inside my engine haha
Click to expand...

I think we're all on that boat. :D
 
Yeah i haven't seen anyone with a funnel at the front, i just thought it would create an expansion chamber type effect sort of, allowing more air to be pushed through the smaller hole a bit like the ends of air compressors, the smaller the opening the stronger the force of air with the same amount of psi being let loose. just theory though i cant prove anything >.<
 
r4z0r84 said:
Yeah i haven't seen anyone with a funnel at the front
Click to expand...

it has been done many a time, its the ghetto mans velocity stack :lol:
 
Put my stock box back in got a brand new K&N Panel Filter, took the extension from the air box to the resonator out and put the tube in its place and taped from the inside so it looks nicer and means i get absolutely no hot air inside my engine. Has much better flow now as the filter is amazing compared to stock plus the cold air is an upgrade regardless as by default it would suck air from the right of the battery, at the other end of the resonator.

Final Result :D
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I swapped from enclosed pod back to setup above a while back, oem box with CAI feed is the way to go, cheap, neat, legal, and flows well

Obv pods have benefits but gains from changing a filter are negligable
 
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