Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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I have replaced the cracked airbox lid for another one and decided to get a K&N panel filter and drill the airbox. I did this on my old 1.2 and found good gains in responsiveness. I know how to do the procedure of drilling, but i would like some cold air feeds this time. I am going to a hardware store to buy some flexi piping, but where do i feed it from, and where have people placed cable ties to hold it on? Thanks in advance 
Dave
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Gambit
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Registered: 5th Jun 00
Location: Common Sense HQ
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personally i'd just cut the front of the box out, as there is a vacuum effect that occurs behind the light
if you want then get a big diameter piece of pipe (u'll see what i mean in B&Q) and attack it to the front of the airbox & behind the light
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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Should i just hover it right behine the light housing where all the power cables for the bulbs lead to?
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chris_uk
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Registered: 8th Jul 03
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i fed a 4" washing machine pipe from the airbox to the underneath of the car! worked a treat!
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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right ok then. I cant believe the difference the new filter has made. Car revs all the way to the redline without hassle and feels like its happy doing it. No funny screeching noises once 6k RPM is reached. all I need is a good drilling to get a nice noise. I could do this now but i want cold air feeds, especially if its gonna be 32 degrees today. Im going to go to a hardware store and buy something meant for a washing machine, since this is all that is needed and run cold air from behind the headlight housing to the bottom or side of the airbox where im gonna drill.
Dave
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Sam
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Registered: 24th Dec 99
Location: West Midlands
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I know it's not the same engine but here's a pic of what I did for one of my experiments in cold air feeds, abeit to a K&N cone filter:
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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Where abouts is that running from Sam? Behind the rad?
Dave
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miles
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Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
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Personally I wouldn't drill it, I would attach a tube to the standard intake and run that to the front of the car.
No matter how many cold air feeds you have they are never going to push enough air there for the engine to suck
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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Yes miles, but its all about supplying the engine with enough COLD air. Cold air is denser and always forces warm air out.
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Sam
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Registered: 24th Dec 99
Location: West Midlands
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quote:
Originally posted by Cybermonkey24
Where abouts is that running from Sam? Behind the rad?
Dave
Yes. You can either squueze the pipes through the little slit where the plastic pipe between the air box and the slam panel used to go, or you can cut that slit away if you don't plan on using an airbox any more so that you have more space for the pipes.
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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I see sam. Cheers for the help everyone. I will experiment with various things i think.
Dave
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miles
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Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
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Yes but the engine will suck in much more than what is provided by an air feed.
If its sealed then it has no option but to suck cold air.
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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I see miles. i have taken it into account. But how hard will it be to sort a tube thats an exact fitment for the square hole and run that to the front bumper?
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and-m
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Registered: 5th May 02
Location: Liverpool. Drives. Skud vRS.
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There seems to be a space at the side of the rad for a decent sized ait intake, on the left hand side looking under the bonnet.
Cyber monkey, you could easily jigsaw a circular hole big enough for a large diameter pipe to fit in, bit of silicone to seal it and jobs done.
[Edited on 15-07-2003 by and-m]
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miles
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Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
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I fibreglassed a bit of old tube to the square rim. Then attached a bit of ducting to the front of the car. I also chopped all of the useless stuff out of the airbox, and removed the funny side bulge bit. The used silicon, fibreglass and the side of an ice cream box to seal it again. It seemed to work ok! Took ages though.....
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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I bet it did. took me ages to cut the pipe from the airbox lid out. The pipe inside the airbox though was easy since it just pulls out.
Dave
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and-m
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Registered: 5th May 02
Location: Liverpool. Drives. Skud vRS.
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I removed that pipe also, just slides out, seems a little louder. Best thing to do is what I mentioned above, cut the hole out larger say 4"
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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yes. I noticed that where the standard air feed runs from, the size of the hole is tiny. I dont have any faith in induction kits since i believe larger power gains can be had from a drilled airbox and decent panel filter. for only £30 and a bit of my spare time.
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and-m
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Registered: 5th May 02
Location: Liverpool. Drives. Skud vRS.
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I totally agree, induction kit may sound better but a sealed box and cold air intake is better for performance.
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