Author Topic: Alternative Cold Air Intake  (Read 8414 times)

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Offline Nismo

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Alternative Cold Air Intake
« on: Aug 24, 2002, 03:20PM »
I have re-configured my CAI setup about 4 times now. My latest effort [last weekend 18/8/02] is quite cheap and retains the original airbox and filter [for those who dont want to go for a pod setup]. My [air intake] resonator was removed yonks ago so this wasnt necessary this time around. Here are the basics:

Parts list: 1 metre X 63mm dia. [approx 2.5inch] flex pipe tubing [black plastic] from Clark Rubber, cost $22.05. 1 X Subwoofer Port [wait for it] which attaches to the front of the piping to act as a bellmouth, this helps suck in more air, cost $4.95 from Jaycar. A few cable ties to secure it to the chassis [priceless ;)].

I will attach some pics shortly to help illustrate the setup but for the DIY'ers out there, its pretty easy to do! I ran the piping through the side "oval-shaped" hole located to the right of the battery / airbox - so no cutting is involved. The airbox needed to be slightly modified to accomodate the pipe [with stanley knife & a file] and the front left driving light has been removed [long ago] to provide a nice opening for the Sub port to sit. Less than $30 bucks and it works very effectively. To make an airtight seal @ the airbox you can use either silicone or blu-tack!

Thanx goes to zhecka for the parts tip-off!

Offline Nismo

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Re: Alternative Cold Air Intake
« Reply #1 on: Aug 24, 2002, 03:48PM »
If you have any specific questions relating to this - just ask!
« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »

Offline fmx_rider

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Re: Alternative Cold Air Intake
« Reply #2 on: Sep 4, 2002, 01:27AM »
Hey Nismo,

Wheres the pics?
I'm planning on doing something similar on the weekend.
Question 1: Did you have to move that black fusebox? looking thing between the battery and the car chassis?
Q2: Is 63mm the largest pipe you could fit?
Q3: Did you have to cut any metal to get the pipe down to the bumper like the ppl who have put in the metal CAI's?

Opinion: Which should be better....a 63mm pipe down to bumper, or say a 100mm pipe to the same spot as the stock intake...it wouldn't be as cold, but it would take in more air, providing the 63mm pipe was restricting the air intake (which it may or may not be doing-I don't know!)
MY98 WRX...work in progress: 3 inch SS turbo back exhaust, high-flow cat, K&N air filter, SPS silicone Y pipe kit, TMIC tilt mod & waterspray @ 8psi, scoop splitter, meshed MY99/00 frontbar + full colorcoding, clear indicators front/side, blue badge; Formula Ferodo TS2000 brake pads, Whiteline 22mm adustable rear swaybar with HD gold links, front strut brace; stereo consisting of Alpine, MB Quart, Eclipse & Rockford Fosgate components + IPOD dock...Next month LINK ECU & more boost (previous ride modded 1989 Pintara T)

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Re: Alternative Cold Air Intake
« Reply #3 on: Sep 4, 2002, 01:49AM »
Hey fmx_rider!

A1: Yes i did remove the black relay? / fuse box? but I put it back afterwards [only just] just 2 x 10mm screws for it i think.

A2 & 3: Yes 63mm is about the biggest you could get without cutting. So, no i didnt cut anything. It wasnt easy getting the pipe through though!

You will need to remove the guard liner though [its plastic with a couple of screws] to get the pipe through.

I will try and take some pics tonight - usually dark when i get home though [yeah i have a flash but its not as good as daylight ;)]

100mm IMO would be too big for this, some ppl say its better to try and get a RAM-AIR effect, the bigger you go the harder this is to achieve. think: pea shooter ;) Go for the bumper - i think CAI is better than WAI
« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »

Offline Nismo

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Re: Alternative Cold Air Intake
« Reply #4 on: Sep 7, 2002, 12:49AM »
Quote
Hey Nismo,
Wheres the pics?

I have taken some pics, transferred to pc but just need to upload - hoping to do this tonight [friday] or tomorrow ;)
« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »

Offline fmx_rider

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Re: Alternative Cold Air Intake
« Reply #5 on: Sep 7, 2002, 06:27AM »
Ok cool..no hurry...I'm so busy at the moment (with uni-thesis writing), I'm putting back doing my CAI and bodykit till atleast the following weekend....hopefully be all done for the #5 meet.
« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »
MY98 WRX...work in progress: 3 inch SS turbo back exhaust, high-flow cat, K&N air filter, SPS silicone Y pipe kit, TMIC tilt mod & waterspray @ 8psi, scoop splitter, meshed MY99/00 frontbar + full colorcoding, clear indicators front/side, blue badge; Formula Ferodo TS2000 brake pads, Whiteline 22mm adustable rear swaybar with HD gold links, front strut brace; stereo consisting of Alpine, MB Quart, Eclipse & Rockford Fosgate components + IPOD dock...Next month LINK ECU & more boost (previous ride modded 1989 Pintara T)

Offline nizgurl

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Re: Alternative Cold Air Intake
« Reply #6 on: Sep 9, 2002, 07:11PM »
Hey Nismo.. while you're at it... Could you please figure out how to do the cold air intake on a CA20? ???  Can't see much room in there to do it but...
« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »
Here's 40 cents. Call me when you've got a clue.

Offline RichTRX

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Re: Alternative Cold Air Intake
« Reply #7 on: Sep 15, 2002, 02:42AM »
Nismo - ???How much power would a CAI add in comparison to a pod??? I'm looking at a different air intake for my car. Price difference???
« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »
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Bro driving: 1990 Nissan Pintara TRX 5sp Red, 16" Rozzis, Lukey 4-2-1 ext, 2.5" full exhaust, hi-flow cat, cone cai, stg 3 chip,  low Kings, GT Gas shocks, Urethane bushings, slotted front rotors, 398000k and still going strong; 0-100 in around 7.2-7.4 seconds

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Re: Alternative Cold Air Intake
« Reply #8 on: Sep 15, 2002, 03:20AM »
Crazynizgrl: Its probably best to speak with Aussie_Gli or someone who has that engine - I'm not that familiar with whats under your hood :o

RichTRX: You could always do BOTH! Money wise a CAI can be a lot cheaper with the right materials - pods can cost a lot before even fitting them. I believe pods are illegal in most states too? As for actual kw's I couldnt say [not having a pod myself] and most ppl I know dont have before and after dyno runs from just an intake mod alone - I imagine you could net similar results with the right setup of either. Perhaps, dare I say, somewhere around 5-10 kilowatts could be attainable.

I would recommend the CAI based on legality, price and you could always add a pod later if you wanted to! If you want the 'induction noise' then get a pod, I already had a K+N panel filter before I did my CAI. Also the factory resonator [read: restrictor] is removed.

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Re: Alternative Cold Air Intake
« Reply #9 on: Sep 15, 2002, 03:37AM »
Thankz Nismo - If pods are illegal I might just steer clear for the time being and go for a CAI.
« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »
His: 2001 Audi S4 biturbo quattro 6sp, Nogaro Blue/black leather recaros, microsilver trim, bose 10sp, SSAC 2.5" twin turboback, RS4 rear sway, 25% tint

Hers: MY99.5 Audi A4 1.8T Quattro GP Edition AVANT 5-sp, phantom black, black leather buckets/walnut/sunroof, 2.5" D&T Turboback, K04-015, N75J, 710N DV

Bro driving: 1990 Nissan Pintara TRX 5sp Red, 16" Rozzis, Lukey 4-2-1 ext, 2.5" full exhaust, hi-flow cat, cone cai, stg 3 chip,  low Kings, GT Gas shocks, Urethane bushings, slotted front rotors, 398000k and still going strong; 0-100 in around 7.2-7.4 seconds

Offline nizgurl

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Re: Alternative Cold Air Intake
« Reply #10 on: Sep 16, 2002, 07:05PM »
Did Aussie-gli end up gettin the CAI done?  I can't remember eh.   Well I have a pod  :-/ Stressin about how the hell i'm gonna get the rego done again  :-/ :-/  And I notice a power difference.  Especially on acceleration.
« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »
Here's 40 cents. Call me when you've got a clue.

Offline noss

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Re: Alternative Cold Air Intake
« Reply #11 on: Sep 17, 2002, 06:10AM »
i got 9kw from my cai.

but then, i'm sure everyone knows that by now.  ::)
« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »

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89tipintara

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Re: Alternative Cold Air Intake
« Reply #12 on: Oct 22, 2002, 07:58AM »
just want to know how do you ensure that no water enters the cai intake down at the front bar. also do you use a pod for a cai setup? if so is this place down at the front bar? cheers.
« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »

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Re: Alternative Cold Air Intake
« Reply #13 on: Oct 22, 2002, 11:45AM »
89tipintara: my own setup consists of the standard airbox [though slightly modified] and bigger piping.

You can use a pod if you want - the best pod setup would be down below, behind the front bar. If located in the engine bay then it should at least be shielded from the heat.

I have no real concern about water entering the front of my intake - there is a fair distance [mostly upwards] for the water to travel before it would get anyway near a stage, that could be detrimental to the engine. It still has the airbox with panel filter to contend with before trying to get near the inlet plenum.

I could almost assume that if any water got through the whole airbox / sensor component it would possibly deteriorate whilst passing through the final stages of piping before entering the penum chamber - as the plastic piping here gets fairly warm by the engine.

Where mine is located it could either A). Be blocked from water by the driving / fog light, B). A steel mesh insert be used or C). Another kind of mesh insert / filter directly on the end of the pipe could also prevent this.
« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »

89tipintara

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Re: Alternative Cold Air Intake
« Reply #14 on: Oct 22, 2002, 01:14PM »
thanks nismo for clearing that up. i will prolly set mine up with the pod behind the front bar.
« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »

Offline noss

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Re: Alternative Cold Air Intake
« Reply #15 on: Oct 23, 2002, 01:41AM »
i have no problems with water with my pod in behind the front bar. i have the fog light removed, but i dont have the pod extended all the way to the opening, it is tucked up as far as it can go, but still in good position to suck plenty of cold air.
« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »

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Re: Alternative Cold Air Intake
« Reply #16 on: Oct 23, 2002, 09:11AM »
to get some sort of "ram" effect though it would have to be behind the opening....prolly not worth it for that little amount of gain hey....
« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »

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Re: Alternative Cold Air Intake
« Reply #17 on: Oct 24, 2002, 01:50AM »
i dont think you'd get much of a "ram" effect after the air has gone all that way to the engine (over 1m)

its best to forget the ram effect. the whole theory behind my cai is more air & also a more efficient way for the air to travel (therefore money spent on mandrel bends) maybe i went a bit overkill? but i think it was definately worth my time & money.
« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »

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Offline aussie-gli

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Re: Alternative Cold Air Intake
« Reply #18 on: Oct 30, 2002, 09:48AM »
Yeh, got a very similar set up to Nismo. I've got 2 inch flexible pipe running from the air box, under the headlight, down to the front bar.  Comes out where the fog lights sit on the TRX.  I've got a temp sensor in there too so I can see the temp of the air entering the box. Appears to work very well on cold days/nights.  Got down to 5.0Deg one night!!!

I used to have a POD setup where the air box sits, but took it out coz it would breath warm engine bay air, and also on the basis that it's illegal.


Quote
Did Aussie-gli end up gettin the CAI done?  I can't remember eh.   Well I have a pod  :-/ Stressin about how the hell i'm gonna get the rego done again  :-/ :-/  And I notice a power difference.  Especially on acceleration.

« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »
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Offline Nismo

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Re: Alternative Cold Air Intake
« Reply #19 on: Oct 31, 2002, 03:18AM »
Quote
I've got a temp sensor in there too so I can see the temp of the air entering the box.

Me too! How about that, i used to have the temp gauge in the airbox but now sits in roughly the same spot as yours.
« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »

Offline aussie-gli

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Re: Alternative Cold Air Intake
« Reply #20 on: Oct 31, 2002, 06:30AM »
great minds think alike...  ;D

what more can I say...

Quote

Me too! How about that, i used to have the temp gauge in the airbox but now sits in roughly the same spot as yours.

« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »
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Offline RichTRX

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Re: Alternative Cold Air Intake
« Reply #21 on: Nov 12, 2002, 12:53AM »
I was thinking of putting a bonnet vent in the car and hooking up a cold air intake to that - it would be fairly small and functional, so not rice, and would probably add a good deal of power with a proper filter. Whatddya reckon? Would I have much concern with water?
« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »
His: 2001 Audi S4 biturbo quattro 6sp, Nogaro Blue/black leather recaros, microsilver trim, bose 10sp, SSAC 2.5" twin turboback, RS4 rear sway, 25% tint

Hers: MY99.5 Audi A4 1.8T Quattro GP Edition AVANT 5-sp, phantom black, black leather buckets/walnut/sunroof, 2.5" D&T Turboback, K04-015, N75J, 710N DV

Bro driving: 1990 Nissan Pintara TRX 5sp Red, 16" Rozzis, Lukey 4-2-1 ext, 2.5" full exhaust, hi-flow cat, cone cai, stg 3 chip,  low Kings, GT Gas shocks, Urethane bushings, slotted front rotors, 398000k and still going strong; 0-100 in around 7.2-7.4 seconds

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Re: Alternative Cold Air Intake
« Reply #22 on: Nov 12, 2002, 02:21AM »
Most air intake setups I have seen get the air from the front of the car. Vents are usually to 'vent' the heat out of the engine bay IMO. Other setups are for top-mount i/coolers.

Of course the piping would be much shorter for a CAI setup compared to the front! Keeping water out hmmm, I would have a look at a wrx close up and see how the vents on that work. Or a similar car that has stock vents.

« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »

Offline RichTRX

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Re: Alternative Cold Air Intake
« Reply #23 on: Nov 12, 2002, 03:37AM »
Yeah, I thought the same about the piping. That way I don't have to take the fog lights out either. I think they look quite good in there. But it's by all means feasible?
« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »
His: 2001 Audi S4 biturbo quattro 6sp, Nogaro Blue/black leather recaros, microsilver trim, bose 10sp, SSAC 2.5" twin turboback, RS4 rear sway, 25% tint

Hers: MY99.5 Audi A4 1.8T Quattro GP Edition AVANT 5-sp, phantom black, black leather buckets/walnut/sunroof, 2.5" D&T Turboback, K04-015, N75J, 710N DV

Bro driving: 1990 Nissan Pintara TRX 5sp Red, 16" Rozzis, Lukey 4-2-1 ext, 2.5" full exhaust, hi-flow cat, cone cai, stg 3 chip,  low Kings, GT Gas shocks, Urethane bushings, slotted front rotors, 398000k and still going strong; 0-100 in around 7.2-7.4 seconds

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Re: Alternative Cold Air Intake
« Reply #24 on: Nov 12, 2002, 10:21AM »
I wanted to put my foglight back in but since I can't get it working atm I have left it off to let more air in!

I think a good setup will still be better than stock even if it sits behind the fog. If its bigger piping and down low then it has to be better than standard me thinks.
« Last Edit: Jan 1, 1970, 10:00AM by 1043326800 »