Nick86

iTrader: (1)

This reasoning is flawed for one reason - You have a hood!

The ducting for the stock airbox relies on one major necessity - a sealed air box. While this snorkle takes cooler air from in front of the radiator - it sucks it from there. There is ZERO "ram" effect in that location. With a sealed airbox (like the stock one), as the throttle opens, it sucks the air in through the filter. Without a sealed box, that snorkle is simply ornamental. Air always takes the path of least resistance - and making it's way up from under the car, across the face of the rad, and into the small opening is hardly the path of least resistance.

When looking at making my CAI, I tested a bunch of theories using a variety of "home made" methods. One of which was to take strips of paper from a shredder and tape them to the inside of the proposed locations - against the airflow. When you drive, the paper would get folded back by the airflow and stay that way. This was vividly displayed in places like the brake ducts. But if I removed the rubber coupler on the stock snorkle to eliminate the "sucking" from the airbox, the paper didn't move at all. While I realize that this is a pretty ghetto method of measuring airflow, I still can't see it as a functional air duct for a non sealed box.

The only way that the snorkle could be rendered functional would be to either have a truely sealed airbox with a cone filter inside, or to cut a hole in the hood exposing the end of the snorkel.

GTUser

That is what I planned to do, unless there is some reason not to build the air box and use the OEM intake ducting to get the air to the filter. By installing the air box in the space left bu removal of the OEM filter and air box wouldn't the A'PEXi intake get sufficient air to work properly?

I don't really want to cut into my existing sheet metal to rig some type of cold air ducting from the wheel well or thru to the front of the car.

Nick86

iTrader: (1)

If you just make an air box and put a cone filter into the box - the engine may get more air than stock, but the air will be warm air taken from under the hood - thus negating any positive effects that a cone filetr would have over the stock setup.

If you don't want to do any drilling, then you have a couple of function options:

You can make a sealed airbox and use the stock inlet. Making a sealed box is harder than you think.

Other than that you'll have to duct cold air into the box. If you take in air from a substantial air flow area, you should be able to overcome strange routing of the intake duct. One of the methods I considered was to make a box in the stock location, and have a rectangular/ovalized tube that went from the bottom of the box straight down between the frame rail and Rad shroud. The tube would then make a 90 degree bend and open up into the airflow under the car. This may mean altering the plastic underpan though.

Come to think of it - I wonder if the stock snorkle (mounted vertically attached to the bottom of the box) would work for that? Hey, it may have a use afterall!

totallimmortal

Hmm, the ram air system on the fist page seems odd considering the arrow shows the air somehow travling right through the headlight, odd. But anyway do a dyno test drive in the real world or what ever the truth is that between all of those cone filter and AFM adapters there is probably a max of 1-2 hp difference. The truth is that all of those systems do is increase airflow over the stock sytem, the flaw here is that the air is hotter so there is more air but not much more oxygen, My advise would be to disregard all the agruements between users in this thread and do a search for some1 who has made an intake. its not very hard i used the 3 inch aluminum pipe and filter from a rsx type s along with a AFM adapter that I got from auto zone. It works and sounds great, but in order for a larger increase in power it would need either a heat sheild or a pipe after the afm that would draw air from somewhere other than under the hood where air is so hot

GTUser

Thanks for the analysis and the challenge. I'll start looking for a sealed unit and then figure out the mating techniques to the intake ducting and to the new filter. Then I'll work on the brackets to hold the sealed box in place. If I'm successful I'll patent the device, post pics, have them fabricated in Botswanna, sell them out of my garage, and retire a happy millionaire! HA, HA, finally the American dream is dawning! $$$$$$ (:

Remeber without problems, nothing would be easy.

Nick86

iTrader: (1)

I like your attitude. Take the time to work it out, and design something functional.
If your going to do it - do it properly!

SDrotary-FC

i run a duct from the front bumper up into the bottom of my air box

Parastie

You don't mean the stock airbox right? If that's what you're using then you're completely negating the filter!

Also, I'm using a cheap autozone cone filter ($25). Flows well and does a good job.