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What is the largest filter I can use?

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Old 08-29-2005, 07:55 AM
Golfmore Golfmore is offline
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What is the largest filter I can use?

In a FL1A application? I want to put a larger filter in my 92 XL all manual. Thanks.
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Old 08-29-2005, 11:30 PM
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The best bet is to run a FL299 which is 1.5 inches longer and the same in all other respects, but probably a thicker can since it is longer. But the FL299 is expensive at the dealer. I order the Purolator version (L40017) for $6 at Advance Auto and they have it the next day. This particular Purolator has the Motorcraft-style threaded end bypass valve too.

Last edited by TallPaul; 08-30-2005 at 12:09 AM.
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Old 08-30-2005, 01:28 AM
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Big O Dave Big O Dave is offline
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TallPaul is right! Here's a list of larger filters, including the FL-299. I've cut open "virgin" filters and measured the surface area of the filter element. TP did the same with the Purolator, which I don't have on my list... perhaps he'll post it, as well.

Here's the list:

Code:
                        Pleat     #           Element      Surface
                        Depth    Pleats       Width        Area
Motorcraft	FL-299	0.750	   64	      5.50	   528.00  
Fram	        PH977A	0.656	   56	      5.69	   418.03  
Baldwin         BT251	0.750	   51	      5.38	   411.19  
Donaldson	P550299	0.625	   60	      5.00	   375.00  
Wix             51773	0.688	   49	      5.13	   345.30  

For Comparison (standard OEM size):
Motorcraft      FL-1A   0.719      56         3.75         301.88
The thing to remember is that surface area is not all there is to the filtering ability of a filter... the element material is at least as important (if not more).

Last edited by Big O Dave; 08-30-2005 at 02:26 AM.
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Old 08-30-2005, 03:25 AM
Golfmore Golfmore is offline
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Thanks for the help.
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Old 08-30-2005, 03:30 AM
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at kragen you can get 2 purolater filters for 5.00 on sale. they had the l40017 in stock and sold me them both for 5.00.
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Old 08-30-2005, 08:10 AM
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Thanks for posting your list Big O Dave. I tried to link to the Oil Guy site and it would not work. Here is my Purolator L40017 data (used filter vs Big O Dave's were new) next to Dave's FL-299 data:

Code:
Filter	Pleat  #Pleats  Element  Element
 	Depth           Width    Area
	   
FL-299	0.750	64	5.50	528.00
L40017	0.719	66	5.38	511.00
BTW, someone at this site a couple years ago posted that the longer FL299 was spec for IIRC an '89 F850 with 460 V8 (among many other years and models obviously).

I use the L40017 on my motorhome and sometimes on my 300 I6. Not to leave the very good FL1A behind, I am running that on the Aerostar 3.0, which specs a FL400.

Last edited by TallPaul; 08-30-2005 at 08:16 AM. Reason: Add brand name and other info
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Old 09-10-2005, 12:18 PM
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Smile

*bump*
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Old 09-10-2005, 04:47 PM
Golfmore Golfmore is offline
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Thanks guys for the help. I was considering the filter area, and possibly a little more cooling?
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Old 09-18-2005, 04:50 PM
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i my ford calls for motorcrat fl820s...i use a much larger size 5.6 in long compared to fl820s 4 incs...fleetguards lf3315 and baldwin b281...
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