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drilling holes in your airbox?

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Old Jul 25, 2005 | 01:57 PM
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Default drilling holes in your airbox?

anyone try doing this? it should increase airflow and power. i guess u could always get another airbox from the dealer for a few bucks if its not working for you...
Old Jul 25, 2005 | 02:14 PM
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you could also send shards of plastic into your engine

or anything else that was bypassing the filter.
Old Jul 25, 2005 | 03:29 PM
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How would drilling holes in your airbox cause shards of plastic to go into the engine? The filter is there to not let anything larger than some dust inside the engine. And no drilling holes inthe airbox will not giet any power increase. You will still be using the same filter that is a major restriction along with a small opening in the box. Go with a Cold air/ram Air intake if you want any gains from the intake part of your engine.
Old Jul 25, 2005 | 03:46 PM
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you might be lukcy and get a nice "whistling" sound when you floor it too!

nah, wont help. the ^^the filter is a pretty big restriction
Old Jul 25, 2005 | 03:51 PM
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Originally Posted by Kenshin
How would drilling holes in your airbox cause shards of plastic to go into the engine? The filter is there to not let anything larger than some dust inside the engine. And no drilling holes inthe airbox will not giet any power increase. You will still be using the same filter that is a major restriction along with a small opening in the box. Go with a Cold air/ram Air intake if you want any gains from the intake part of your engine.
when you drill plastic it doesn't drill clean it's somewhat brittle and little pieces come off.

as far as getting into the engine, it depends on where you drill it but it could be past the filter.


i'd rather have a turbonator than drill my OEM airbox.....
Old Jul 25, 2005 | 03:56 PM
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Well hopefully you would take top of the air box off before you drill it.
Old Jul 25, 2005 | 04:41 PM
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you should try it and let us know how it goes...
Old Jul 25, 2005 | 05:12 PM
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Originally Posted by Liter-A-Cola {tC}
Well hopefully you would take top of the air box off before you drill it.
if you're "smart" enough to be drilling holes in an OEM intake.. what are the chances they take it off?
Old Jul 25, 2005 | 05:50 PM
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watercooled vw owners have been doing this since the early 80's. they call it a "swiss cheese" intake/airbox.

Easy how-to for any car:
-completely remove entire air box assembly from car.
-drill small holes in the BOTTOM portion of the box (so many idiots have drilled the top). Make sure the holes are on the part of the box that faces AWAY from the engine (you dont want to suck up hot air).
-reinstall with K&N panel filter.
-tip: if space allows, get some duct tubing from home depot and rig up some form of supplimentary air intake to the swiss cheese holes.

VW owners (me being a former one) agree that a swiss cheese intake is absolutely not a replacement for a CAI, but it is a cheaper alternative to a short intake. everyone agrees that compared to a stock setup: there is some minor performance gains, and sounds awesome at WOT.

For California drivers, a swiss cheese intake is a good idea because it looks stock. You dont want to have your hood popped by law enforcement and get sent to a state/BAR smog referee for a non-legal intake (which is a completely unpleasant experience if your car is not 100% stock. can be costly too). Unfortunately, no TC CAI on the market is legal for road use in California (otherwise I'd get one). I've already put my order in for a K&N panel filter and a spare airbox.

examples of swiss cheese



Some VW owners say "F" holes, and make a large openning.
Old Jul 25, 2005 | 10:05 PM
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great info, thanks HKSpeed!
Old Jul 25, 2005 | 10:11 PM
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You'll be drawing hot air from beneath the hood rather than the cooler air in your fender well... not sure you will see any gain there.
Old Jul 25, 2005 | 10:31 PM
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Originally Posted by engifineer
You'll be drawing hot air from beneath the hood rather than the cooler air in your fender well... not sure you will see any gain there.
true. as i mentioned earlier, a swiss cheese air box is no replacement for a CAI.
but having a swiss cheese air box is much better (and cheaper) than a short ram intake with an exposed K&N cone-style, which would suck in air from all directions hot and cold. thats why weapon r made that heatshield/box for their short ram.
Old Jul 25, 2005 | 10:35 PM
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LOL

wow. that's all i can say.
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