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Old 10-23-2000, 11:13 AM   #1
Scooby Newbie
Member#: 1056
Join Date: Mar 2000
Chapter/Region: E. Canada
Location: Ottawa, ON, Canada
Question cold air vs. cone filter?

I tried searching older topics, but I could not find an aswer that satisfied me...

What is the performance difference (if any) between a cold air intake (as pictured) and a cone filter under the hood (ie: Weapon-R)?

Assistance greatly appreciated.

(2000 RS sedan)

[This message has been edited by Skeandhu (edited October 23, 2000).]
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Old 10-23-2000, 03:12 PM   #2
Scooby Specialist
Member#: 1342
Join Date: Apr 2000
Chapter/Region: MAIC
Location: Pennsylvania, USA
May your line be smooth


A Cone under the hood can give slightly better performance if a box is made so it draws cool air from the fender. However, the longer pipe can hurt low-end power slightly. The stock box is good for low-end, not as good for top-end, and much cheaper to provide cool air to (one, short pipe). I cant provide numbers specifically. Ever considered brucelee's intake? Very good in my opinion...
Hey brucelee, shows us the intake!
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Old 10-23-2000, 04:14 PM   #3
Scooby Newbie
Member#: 1056
Join Date: Mar 2000
Chapter/Region: E. Canada
Location: Ottawa, ON, Canada

Thanks for the input... I've seen brucelee's intake design (ram air, box under scoop). I liked it but was looking for a cheaper (read: less labour intensive) alternative. Also, I was concerned about sucking in water, snow etc.

To add to my previous question:
Would altering the intake cause my car to run lean? Heard about this problem, but not sure how bad it is in the my00...

Input appreciated.

(2000 RS sedan)
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Old 10-23-2000, 05:14 PM   #4
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Member#: 2573
Join Date: Oct 2000
Location: Portland Or . SPEC

The cold air intake will work better. It just depends on what kind of filter you use. The reason the cold air works better is because the air it sucks in is (you guessed it) cold. Cold air has a denser Oxygen content, thus more oxygen gets into the combustion chamber. This results in a higher caliber explosion, creating more power. I did the intake in the fender thing on my '99. I found a K&N cone style filter that fit in the fender, on the end of the pipe. You can use a cone under the hood with a heat shield to block warm air, but if you want it to work 100% you should go with it completely in the fender. I am not posative but from what I have heard cone filters work better than fiters in the filterbox.(but I am not an expert.)
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Old 10-23-2000, 07:23 PM   #5
ImprezaRS dot com
over boosted again
Member#: 1458
Join Date: May 2000
Chapter/Region: RMIC
Location: Colorado Springs CO USA
2013 B9 Tribeca LTD
2005 Impreza 2.5 RS


Cold air is definitely better.

Not only do I sell intakes similar to the one pictured above, but we just installed our first Cold Air kit for a MY97-99 on a MY98 today, and it works pretty darn well. The car definitely scoots faster than before. We shoulda used a yellow one in the photos, since they look so much better. Hopefully we'll have the MAF brackets made up within a week to start selling them next week. Once they are ready for sale, we will add a pay now button to the products page on the website.

Larry www.ImprezaRS.com

PS: We can also convert a JC Sports intake into a true "cold air", using the MAF adapter we include with this kit, and a different mounting position on the bracket we are making.
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Old 10-24-2000, 01:37 PM   #6
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Join Date: Jun 2000
Location: Cleveland, Ohio
2004 WRX Sport Wagon


you can also do a little of both..a cone filter with a plexiglass box around the filter and open up the scoop vent...that way it's not too long and pulls air directly from the vent.

just make sure and use plexi that won't melt at a low temp.
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