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12-09-2007, 06:41 AM | #1 |
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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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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 |
12-09-2007, 04:04 PM | #3 |
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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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1997 Astina BA11P3, 5 Door Hatch, 1.8 DOHC, 5 Speed, 90,000 kms |
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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12-09-2007, 04:54 PM | #5 | |
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Quote:
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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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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12-09-2007, 06:07 PM | #7 |
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12-09-2007, 07:18 PM | #8 | |||
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Quote:
Quote:
Quote:
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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1997 Astina BA11P3, 5 Door Hatch, 1.8 DOHC, 5 Speed, 90,000 kms |
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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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12-09-2007, 11:18 PM | #10 |
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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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Understeer is when you hit the wall with the front of the car and oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall, torque is how far you take the wall with you. '97 1.8L Hardtop '93 3.0L TT 3000GT |
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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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
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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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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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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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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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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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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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13-09-2007, 10:10 AM | #19 |
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Wouldn't you want it to be a colour which reflects heat?
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13-09-2007, 10:11 AM | #20 |
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I wouldn't have thought it'd be a problem. Especially if you fit a more powerful fuel pump.
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