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Old 12-09-2007, 06:41 AM   #1
asanga
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Talking Did my CAI

Did my CAI on Sunday. Bought a 80mm x 100cm flexible silicone air filter hose (red) from autobarn and few PVC pressure fittings , PVC pipes /storm coupling fittings, PVC bends & hose clamps from Bunnings.

Front bar removal was bit tricky as I had to find all the screws & bolts holding it to the car. Once the bar was off, I removed the resonator. The resonator air inlet port was pretty much up against the inside wall of the side guard. Surely it was protected against water getting in & other road dust but not for getting enough air!!!……but its off now!! The PVC fitting fitted nicely & tight in to the air box inlet hole (did not alter the air box inlet). The silicone hose was routed through the side opening (once the resonator is removed, plenty of room there) to the front of the car and left it align with the opening on the front bar where the stock fog lights would go. Once the bar was put back on the PVC bend was fitted to the silicone hose.

Big improvement in acceleration and that mid range torque. Can clearly feel the difference when take off. Should improve the fuel consumption but yet to confirm that.
Noise is very minimal (hardly notice it under 3000 rpm).

Here are some pics to show my method.



Silicone hose, PVC pressure fitting & PVC coupling fitting


Air box removal


Inlet hole in the air box


PVC pressure fitting fits in nicely (need to paint this black to blend in with air box )


After cutting the extra bit off the PVC coupling


PVC pressure fitting attached to the coupling


After cutting the extra bit of the other end of PVC coupling



Now the silicone hose can be fitted to the PVC coupling


Hose clamp to secure the hose



Had to cut the bracket to make room for the hose



Hose fitted to the air box


Air box in place



Silicone hose routed out of the side opening to the front side


PVC bend & another PVC coupling (spray painted it black)



All done!! (need to paint the red bit black & put a mesh to filter out any large particles getting sucked in) :-)
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Old 12-09-2007, 08:37 AM   #2
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The difference in acceleration & response feels good doesnt it !

For a bit of a growl sound you can leave a small gap between the pipe and the inlet to the airbox. Although you lose a bit of the performance, it does sound nice
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Old 12-09-2007, 04:04 PM   #3
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Quote:
Originally Posted by Dogo View Post
The difference in acceleration & response feels good doesnt it !
oh yeah.....now every time i take off...i just floor it!! Love the traffic lights!! so i don't expect a improvement in fuel consumption till i settle down a bit !!
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Old 12-09-2007, 04:08 PM   #4
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Ha, like that will happen.

Your fuel won't go down but then agian it won't go up too much either. i find that I use about 10.4L/100km when I drive sensibly and about 11.2L when i cream it everywhere. For instance a hill cruise where you never drop below 4,500RPM. Not much of a difference considering how much of a difference is displayed by the driving conditions.


I find it fascinating
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Old 12-09-2007, 04:54 PM   #5
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Quote:
Originally Posted by asangag View Post
Should improve the fuel consumption but yet to confirm that.
Noise is very minimal (hardly notice it under 3000 rpm).
If you don't have an exhaust mod, your fuel consumption should increase. The stock ECU detects more air and adds fuel accordinly. Small differences in fuel consumption from intakes mods anyhow, exhaust mods are where the big gains and losses are made.

Funny how you don't much change in noise, as when I had this mod on my Astina it droned like a fog horn! But then I had the exhaust done at the time too...

Gav.
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Old 12-09-2007, 05:04 PM   #6
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The noise is probably absorbed by the rubberish pipe. Mine is similar with a plastic flex pipe and you can hear a difference
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Old 12-09-2007, 06:07 PM   #7
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Quote:
Originally Posted by RedLineResident View Post
Ha, like that will happen.

when i cream it everywhere.


I find it fascinating
im sorry what are we talking about??

just kidding mate.
thats a pretty good place to have it there. shame i have fog lights hahaha
nicely done mate
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Old 12-09-2007, 07:18 PM   #8
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Quote:
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im sorry what are we talking about??

just kidding mate.
thats a pretty good place to have it there. shame i have fog lights hahaha
nicely done mate
well...I was thinking of installing driving lights (small ones) , I think I still have some room there to squeeze one in !

Quote:
Originally Posted by RedLineResident View Post
Ha, like that will happen.

Your fuel won't go down but then agian it won't go up too much either. i find that I use about 10.4L/100km when I drive sensibly and about 11.2L when i cream it everywhere. For instance a hill cruise where you never drop below 4,500RPM. Not much of a difference considering how much of a difference is displayed by the driving conditions. I find it fascinating
I don't expect much of a improvement in fuel consumption either, if I drive normally it used to be 8.3L/100km and aggressively 9.8L/100km. I guess it will be somewhere in between now!

Quote:
Originally Posted by chicaboo View Post

Funny how you don't much change in noise, as when I had this mod on my Astina it droned like a fog horn! But then I had the exhaust done at the time too... Gav.
Must be your exhaust! I don't have one yet !
Like cosmo said ...Probably the soft silicone hose acts like a resonator in reducing intake noise, also my setup is very air tight all the way to the air box and that cold be the other reason. However I get a nice low growl at high rpm (above 3000)
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Old 12-09-2007, 07:20 PM   #9
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I miss my BG intake sound. It was glorious. Nice mod
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Old 12-09-2007, 11:18 PM   #10
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Quote:
Originally Posted by asangag View Post
well...I was thinking of installing driving lights (small ones) , I think I still have some room there to squeeze one in !
if you have a hardtop the front bar has a hole for the intake on the left hand side. i'm running perfect sized driving lights to fill the holes but i should still be able to fit a CAI using that hole + the minor airflow around the light.
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Old 13-09-2007, 07:14 AM   #11
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That hole is plugged up by foglights in the V6 model. If you got that gap run a pipe out of each one, join them together along the way somewhere and get twice as much air into the box.
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Old 13-09-2007, 08:17 AM   #12
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i was thinking of doing that. twin induction straight to the box. i just need to get an air box so i can drill it
hahaha
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Old 13-09-2007, 08:35 AM   #13
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I was thinking two pipes into one then into the air box but that is so much better. I might do that when i have a weeked off. (once in a blue moon)
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Old 13-09-2007, 08:36 AM   #14
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I had twin corrugated pipes into the bottom of my airbox. Now i'd just use 90mm plumping pipe instead.
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Old 13-09-2007, 08:38 AM   #15
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Does it work better?

Would too many pipes and too large a pipes have any draw backs?
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Old 13-09-2007, 09:17 AM   #16
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Nah, just looks a bit tidier. If i was smarter i'd be able to tell you of the difference in the volume of air using 1 pipe vs 2 pipes and the relative velocity...but i can't!
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Old 13-09-2007, 09:35 AM   #17
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Is volume more or less the key or do you want to create the best vacuum affect, kind of like the idea of exhaust and headers being to suck fumes out better, is it the idea to create an intake system which creates the best flow which would ensure the colders air from outside.
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Old 13-09-2007, 09:41 AM   #18
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its a similar but different theory.. correct me if im wrong but wouldnt it be best to get as much air in as possible? thats why i thought twin induction because there wouldnt be restriction from joining pipes and such. but i guess there is a limit where the ecu struggles with fuel..
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Old 13-09-2007, 10:10 AM   #19
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Quote:
Originally Posted by asangag View Post
need to paint the red bit black
Wouldn't you want it to be a colour which reflects heat?
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Old 13-09-2007, 10:11 AM   #20
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but i guess there is a limit where the ecu struggles with fuel..
I wouldn't have thought it'd be a problem. Especially if you fit a more powerful fuel pump.
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