Witch filter flows more air.

 

Hands down the NAPA 6637.

 

I'm interested in this topic as well. Does anybody have any hard data on this? I'm about ready to update my intake and these are the 2 that I've narrowed it down to.

(PSNut): I noticed in your Sig. that you have the AIS installed. Why not the 6637 if it flows more air. You obviously have your reasons and possibly some info. Please share!

Thanks Much.

 

I have had an AIS intake on my PSD since they came out and have read tons of member's responses on the AIS compared to other intake systems such as the Tymar (napa) version.

If your PSD is stock and you opt for the AIS then it will flow more air than your PSD can use. If you are chipped/tuner, etc. then you will have to do a zoodad mod and/or the fender sleeve mod in order for the AIS to get more air flow.

I have not seen scientific evidence that show actual results comparing the AIS against the Tymar on air flow specs., etc. I would have to guess that the Tymar will flow more air.

I do know that the AIS offers the maximum filtration available. Sometimes you have to sacrifice a bit of flow for the filtration capabilities. Depends on what goal you're trying to achieve by installing the AIS or the Tymar style intake.

If warranty is a concern and your truck is pretty much stock then the AIS is probably the way to go as it is a factory approved accessory.

FYI: Recent Thread:
https://www.ford-trucks.com/forums/s...&highlight=ais

 

Here's another thread that will be food for thought.

https://www.ford-trucks.com/forums/s...d.php?t=417517

 

I was concerned about warranty issues as Heatstroked pointed out so i chose the AIS. Never seen actual airflow/filtration data on it. Just read alot on how good the Donaldson air filters are.

 

Here is WIX's data straight from their site....
<table border="0" cellpadding="2" cellspacing="0"><tbody><tr valign="top"><td class="blackmedium" width="130">Part Number:</td> <td class="blackmedium">46637</td> </tr> <tr valign="top"> <td class="blackmedium">UPC Number:</td> <td class="blackmedium">765809466371</td> </tr> <tr valign="top"> <td class="blackmedium">Principal Application:</td> <td class="blackmedium">Air Filter Assembly for Various Equipment.</td> </tr> <tr valign="top"> <td class="blackmedium">
</td> <td class="blackmedium">All Applications</td> </tr> <tr valign="top"> <td class="blackmedium">Style:</td> <td class="blackmedium">Air Filter</td> </tr> <tr valign="top"> <td class="blackmedium">Service:</td> <td class="blackmedium">Air</td> </tr> <tr valign="top"> <td class="blackmedium">Media:</td> <td class="blackmedium">Paper</td> </tr> <tr valign="top"> <td class="blackmedium">Height:</td> <td class="blackmedium">12.380</td> </tr> <tr valign="top"> <td class="blackmedium">Outer Diameter:</td> <td class="blackmedium">8.500</td> </tr> <tr valign="top"> <td class="blackmedium">Inner Diameter Top:</td> <td class="blackmedium"> Closed </td> </tr> <tr valign="top"> <td class="blackmedium">Inner Diameter Bottom:</td> <td class="blackmedium"> 4.000 </td> </tr> <tr valign="top"> <td class="blackmedium">Ends:</td> <td class="blackmedium">Metal</td> </tr> <tr valign="top"> <td class="blackmedium">CFM:</td> <td class="blackmedium">425 <--------- that's it.
</td> </tr> <tr> <td colspan="2">
</td></tr></tbody></table>http://www.wixfilters.com/filterlook...&Submit=Search

 

called Donaldson to request specifications on the P606122...... they were unable to give me a CFM rate for this filter which I thought was strange.

<table cellpadding="1" cellspacing="1" width="100%"><tbody><tr><td class="staticTable" colspan="2" align="left" nowrap="nowrap" valign="top">Air Filters Product Attributes</td></tr> <tr><td class="staticBody" align="left" nowrap="nowrap" valign="top" width="20%">A (Inches): </td> <td class="staticBody" align="left" nowrap="nowrap" valign="top" width="80%">8.43</td></tr> <tr><td class="staticBody" align="left" nowrap="nowrap" valign="top" width="20%">B - (Inches): </td> <td class="staticBody" align="left" nowrap="nowrap" valign="top" width="80%">6.20</td></tr> <tr><td class="staticBody" align="left" nowrap="nowrap" valign="top" width="20%">C (Inches): </td> <td class="staticBody" align="left" nowrap="nowrap" valign="top" width="80%">14.38</td></tr> <tr><td class="staticBody" align="left" nowrap="nowrap" valign="top" width="20%">Product Type Description: </td> <td class="staticBody" align="left" nowrap="nowrap" valign="top" width="80%">AIR PRIMARY, POWERCORE</td></tr> <tr><td class="staticBody" align="left" nowrap="nowrap" valign="top" width="20%">Primary Application: </td> <td class="staticBody" align="left" nowrap="nowrap" valign="top" width="80%">FORD 2U2J9601BA</td></tr> <tr><td class="staticBody" align="left" nowrap="nowrap" valign="top" width="20%">Primary Application 2: </td> <td class="staticBody" align="left" nowrap="nowrap" valign="top" width="80%">MOTORCRAFT FA1757</td></tr> <tr><td class="staticBody" align="left" nowrap="nowrap" valign="top" width="20%">Application Note: </td> <td class="staticBody" align="left" nowrap="nowrap" valign="top" width="80%">Replacement element</td></tr> <tr><td class="staticBody" align="left" nowrap="nowrap" valign="top" width="20%">Application Note 2: </td> <td class="staticBody" align="left" nowrap="nowrap" valign="top" width="80%">for Ford 7.3 Air Cleaner Kit</td></tr></tbody></table>

 

Ahhhh. I see. That's what I thought, just didn't want to assume anything. I think I'll opt for the cheaper version (6637) as opposed to the AIS. I've got an early 99 so I believe I will need to purchase or fab up a different intake tube.

Thanks for the replies!

 

I like the AIS

 

One intersting note:

I have had my oil tested at least twice a year by Blackstone Labs since the day my PSD was new.

I ran a drop in K & N filter for the first year and the Silicon levels in my oil tested at 7 PPM.

Since I installed the AIS Severe Duty intake and filter, the Silicon level has been testing between 3-4 PPM.

Does anybody have any similar records on the filtration of the Tymar (aka Kwik) air filter?

 

i have the kwik filter and love it. i have another one waiting in our shop, ready for our 1995 when we get it back.

 

I'm running around 7ppm of silicon with a 6637, down from averaging around 9 for the stock pleated filter and housing.

Pop

 

Ok ... .got a call back from Donaldson on the P606122 / FA1757 with the CFM number for their filter. It flows 775 CFM.

So to recap ....
Napa 6637 CFM = 425
AIS / FA1757 CFM = 775

Clearly the there is a big difference by the numbers.

 

the NAPA figure doesn't sound right, check this thread:https://www.ford-trucks.com/forums/s...d.php?t=417517
This gent has real world dramatic results with the filter in competition and knows his stuff.
Also, i would want independent lab test results from a flow bench. Just my .02 worth.