^Heh yea photo copyright 2009 chris@perrin, all rights reserved, must pay 3 gumballs or one gobstopper if you have viewed this pic

 

LOL You could have staged them better too by having the logos facing the camera!

 

Redo:

 

Any chance you could get actual sq/in measurements of the filtering media?

 

Better #'s with the new filter? How new is it? Is it a new part #?

 

Here's what Chris sent me, and some *ROUGH* calculations based on them:

3.125 filter: 6.25" high 17" girth (radius=2.7") surface area: 106 (cyl) + 22.9(top) = 128sqin

4.5 filter: 6" high 20" girth (radius=3.2") surface area: 120 (cyl) + 32 (top) =152sqin


**EDIT** look at the pics, the filter media is more than .25" different in height. I'll see if I can get new measurements from perrin.

So the new filter has ~85% of the surface area of the old filter. However, in the real world, most of the air will end up being sucked through the tip and top section of the filter, as that is where most of the fresh air is being delivered. Since I have an undertray, tranny, piping, frame, etc on all the other sides of it, ultimately it is the more the filter media that will dictate flow and less total surface area (as long as they are mostly the same size).

It'd be cool to see any fluid dynamics tests that have been done on this, actually.

Which new filter, the one I put on yesterday? I/we don't run a shop, and don't own a dyno, so hopefully I get time to do a quick before/after next time I'm on one of our local awd dynos.

 

I agree, air isn't being sucked through the filter equally, so the total surface area doesn't really make a difference. Plus our foam filters filter dirt so well, it doesn't matter anyway. If you guys have some time on your hands, you can read the benefits of our foam filters here: http://perrinperformance.com/pages/show/129

 

"Oiled for your protection!

All our foam filters are oiled with special thick, oil that clings to the foams structure. This special oil is what makes our filter, filter! The oil is what stops the dirt from passing through the filter getting into your engine. The oil is what catches the tiny little particles that would normally pass through the open holes in a dry type filters. The only dry type filters you will find around our shop are OEM ones we have thrown away or our foam filters in the middle of being cleaned! Dry filters rely on the very very small openings (as seen in the pics above) to stop dirt. Then they rely on being cleaned very often to get rid of the dirt to keep it flowing freely. "

Taken directly from their website. All you guys that removed the oil from the filter, you're not doing it right.

 

Removing all the oil from a foam filter is a very bad idea. All I recommend is to take a paper towel and wipe up any excess oil.

 

So, it sounds like there's a variable of filter placement in the engine bay as well correct? For instance, my filter is furthur away from the engine, and has the factory ram air thing (can't remember the name) pointed at it. Therefore, making use of more surface area.

 

Does leaving that plastic ducting even do anything?

 

I think it does a little at least. Why? Because I always have little bugs on my air filter right where the ducting points at it

 

Sorry, I swear when I was looking at their pipe that I could clearly make out "AMSOIL" in the same location as mine. I'll edit my post...

The pipe is home-fab ghetto-fab. The filter is direct from AMSOIL

 

I've seen it being used by a couple of manufacturers: http://www.motorworldhype.com/wp-con..._cf_intake.jpg

 

Did you not see the email from Wayne at PPI about the filter being Vibrant?