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Joined: Dec 2003
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GTS2003BLK
Senior Member
GTS2003BLK May 2, 5:32pm - #169921 

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2003 Toyota Celica

Joined: Dec 2003
Posts: 487
Portland, Oregon
Filter options for Injen CAI?

Filter options for Injen CAI?

Has anyone out there tried putting different filters on their Injen CAI?

The factory Injen filter is closed on the top, I see other brands in all the magazines that have filter elements on the top of the cone in addition to the side. Seems like these filters would be less restrictive and allow more air in because of more filter surface area.

Blitz makes a cone filter that uses fine metal mesh instead of oiled cloth.
Joined: Aug 2003
Posts: 6,372
Speed4TheNeed
Caleb
Speed4TheNeed May 2, 5:45pm - #169922 

Caleb
2000 Toyota Celica

Joined: Aug 2003
Posts: 6,372
New Orleans, LA
the Injen filter is really just a k&n filter.

not sure about how 'restrictive' other filters are..but i do know the k&n filter is excellent thumbsup
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5280vvti
Senior Member
5280vvti May 2, 5:46pm - #169923 

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2002 Toyota Celica GT

Joined: Mar 2004
Posts: 815
CO
Most of the other complany's (AEM/Injen) filters are just retagged K&N filters. SOme don't come with an "air-horn" built into the top though.
You can always buy an K%N X-Stream filter. Its just a regular cone Air Filter with the open top.
TRD also makes a cone Air Filter. From looking at it it looks to long to fit, but it may be worth a try.
On top of that there are blitz filters that can be adapted to fit your CAI and actually add noteable gains. They're like $200+ though, so maybe try a group buy. wink

http://www.titanmotorsports.com/blitsusaircl.html
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Posts: 5,129
Sultan
Speed Omen
Sultan May 2, 6:31pm - #169924 

Speed Omen
2002 Toyota Celica GT

Joined: Jan 2004
Posts: 5,129
Philadelphia, PA
^^^
that Blitz filter from the link looks nice - may have to look into that
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BaTMaN_4
Senior Member
BaTMaN_4 May 2, 8:11pm - #169925 

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2002 Toyota Celica GT

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Posts: 753
McAllen, TX
My friend with a GTS put an Apex-i filter on his Injen CAI and according to him he loves it, says he feels more gains in hp. Blitz = thumbsup thumbsup
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Speed4TheNeed
Caleb
Speed4TheNeed May 2, 8:39pm - #169926 

Caleb
2000 Toyota Celica

Joined: Aug 2003
Posts: 6,372
New Orleans, LA
^^ thats driver bias.

you can't feel the difference between an Air Filter thumbsup
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BaTMaN_4
Senior Member
BaTMaN_4 May 3, 3:57am - #169927 

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2002 Toyota Celica GT

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Posts: 753
McAllen, TX
^^ I agree, maybe the noise will be different but thats it thumbsup
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speed_celica
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speed_celica May 3, 6:25am - #169928 

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2000 Toyota Celica

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Posts: 427
Calgary, AB, Canada
I kinda have the same question on my mind. My Injen CAI filter is kinda worn out, but I'm not sure what filter i should get to replace the original without sacrificing power!
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Posts: 2,269
NorwayGT
Specialist
NorwayGT May 3, 6:27am - #169929 

Specialist
2004 Dodge SRT4

Joined: Aug 2003
Posts: 2,269
Seattle, WA
i recently replaced my Injen filter that came with my CAI with a bigger Injen one. the one that came with my Intake was only about 2/3rds the size of the one i got now

was....5speed with i/h/e
15.41 @ 89.30mph 2.282 60'

is....04 srt4 stock
13.936 100.15mph 2.177 60'
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Posts: 427
speed_celica
Senior Member
speed_celica May 3, 6:37am - #169930 

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2000 Toyota Celica

Joined: Apr 2004
Posts: 427
Calgary, AB, Canada
What??? where did you get it from??? is it from a CAI or the Short Ram???... I'm dying to replace mine grin
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Posts: 2,269
NorwayGT
Specialist
NorwayGT May 3, 6:37am - #169931 

Specialist
2004 Dodge SRT4

Joined: Aug 2003
Posts: 2,269
Seattle, WA
Originally Posted by speed_celica
What??? where did you get it from??? is it from a CAI or the Short Ram???... I'm dying to replace mine grin

its the CAI. i got the bigger Injen filter from this tuner shop in my area

was....5speed with i/h/e
15.41 @ 89.30mph 2.282 60'

is....04 srt4 stock
13.936 100.15mph 2.177 60'
Joined: Apr 2004
Posts: 427
speed_celica
Senior Member
speed_celica May 3, 6:44am - #169932 

Senior Member
2000 Toyota Celica

Joined: Apr 2004
Posts: 427
Calgary, AB, Canada
I've read a lot of people using the Apex-i filter, but it looks really small compare to the Injen filter... just not sure if it's better for Performance or worst!
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Posts: 487
GTS2003BLK
Senior Member
GTS2003BLK May 3, 7:26am - #169933 

Senior Member
2003 Toyota Celica

Joined: Dec 2003
Posts: 487
Portland, Oregon
Originally Posted by sPeEd4tHeNeEd
^^ thats driver bias.

you can't feel the difference between an Air Filter thumbsup


It's all about getting more oxygen and fuel into the internal combustion chamber. Turbos, Superchargers, Nitros, CAI, and SRI that utilize High Flow Low Resistance Air filters are all part of the means to the same end, which is getting more oxygen and fuel in to the engine.

Now, What makes an air filters high flow and Low Resistance? Two things:

1. permeability of the filter element membrane.
2. Surface Area of the filter element membrane.

Altering either one of the two above variables will result in a change in the amount of Oxygen flow into the internal combustion chamber, and thus a change in the amount of and efficiency of the fuel burn, thus how much force and power the engine can produce.
Now I don't know about you, but when there is a change in my engine's power output I feel it.

If I put a filter on the end of my CAI that has more surface area and higher Permeability than that of the previous fitler can anyone guess what will happen?
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Posts: 427
speed_celica
Senior Member
speed_celica May 3, 7:35am - #169934 

Senior Member
2000 Toyota Celica

Joined: Apr 2004
Posts: 427
Calgary, AB, Canada
so the smaller the filter, the smaller the Performance gain???
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Posts: 487
GTS2003BLK
Senior Member
GTS2003BLK May 3, 7:44am - #169935 

Senior Member
2003 Toyota Celica

Joined: Dec 2003
Posts: 487
Portland, Oregon
What makes an air filters high flow and Low Resistance? Two things:

1. permeability of the filter element membrane.
2. Surface Area of the filter element membrane.

In short it depends on what the filter is made of how much surface area it has.

One way of gaining greater surface area is to have deeper pleats in the filter element.

The smaller the surface area the smaller the Performance gain, but do not forget about permeability of the filter element membrane.
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