Compare these Fuel Filters.........(UPDATE)....... ????
#834142
10/19/10 09:04 PM
10/19/10 09:04 PM
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69CHARGERMD
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What do you guys think of these filters ? First one is a Summit, 40micron, inline style. Flow is stated as 130 gph, length is 4 inch filter Second is a Mallory 140 series. 40 micron, Flow is 200 gph. Canister style filter I recently installed a Mallory 250 fuel pump, ,, ( and the above summit brand, inline, filter. ) Fuel pressure is drifting down,,,,after launch to 3-4 lbs,,,,and when driving around in the pits..... Do you guys think this little, inline filter flows 130 gph ? I pulled it off the car,,,and put the Mallor 140 series filter on the car. ( i had it sitting on the shelf ), so it didnt cost anything. I also upgraded my fuel cell vent size from -6 to -8 ( same as my fuel line size),,,just for good measure.... Still need to "flow" the fuel system,,and make sure no other issues... Is the Mallory 140 filter "big" enough for the Mallory 250 pump ? I wonder if the smaller, summit, inline filter was choking the motor / fuel delivery down the track... ?? (they do make a "bigger" mallory filter) Would that be over kill ?
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Re: Compare these Fuel Filters................ ????
[Re: 69CHARGERMD]
#834145
10/19/10 09:19 PM
10/19/10 09:19 PM
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Joined: Feb 2005
Posts: 28,312 Cincinnati, Ohio
Challenger 1
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Quote:
Is the Mallory 140 filter "big" enough for the Mallory 250 pump ?
I wonder if the smaller, summit, inline filter was choking the motor / fuel delivery down the track... ??
40 micron is too small for in front of the pump. 100 is more like it.
I know alot guys will come on here and tell me I'm wrong, am I? Nope
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Re: Compare these Fuel Filters................ ????
[Re: 69CHARGERMD]
#834147
10/19/10 09:25 PM
10/19/10 09:25 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Doug the 140 MIGHT be big enough but the 500 WILL be... this is from the details on the Summit site These Mallory 500 Series fuel filters are designed for use with the Mallory Comp Pump 250 and 500 series fuel pumps. They may also be used with Mallory Comp Pump 110 and 140 Series fuel pumps. The 500 Series filters are perfect for those engines that require a maximum-flow, minimum-restriction filter. An integral mounting bracket makes installation fast and easy. the 500 wont have any restrictions for sure... but try the flow test first to see what you have
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Re: Compare these Fuel Filters................ ????
[Re: DoubleD]
#834148
10/19/10 09:29 PM
10/19/10 09:29 PM
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69CHARGERMD
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Dave, The pump has a bypass, i have a -8 running from the bypass on the pump to the fuel cell. I tried 2 different gauges on the cowl,and under the hood,,,both read the same when the car "acts" up,,and drops fuel pressure.., and 2 different regulators, no difference that i can tell. I need to do the flow test ( have to get some more race fuel in the car ) I wondered about a line issue.
The filter is plumbed BEFORE the pump
I recall you mentioning the inline filter at Norwalk,,,Is Russ running 2 of them ?
Thanks Mike,,,,i had the 140 filter available,,so i thru it back on the car,,, I noted that when i tryed to blow some air thru the inline filter,,,it was "clogged" a bit,,,and then opened up some,,,seemed a bit restrictive...
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Re: Compare these Fuel Filters................ ????
[Re: 69CHARGERMD]
#834149
10/19/10 09:30 PM
10/19/10 09:30 PM
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Joined: Aug 2003
Posts: 684 Milwaukee
ToddP
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I run a mallory 250 pump. This pump is very powerful and will cavitate if the suction side is at all restricted. I run an an-12 pickup line from the fuel cell to an aeromotive 100 micron straight filter. Unfortunatly the mallory 250 only has an-8 size suction and discharge . I used and adapter an-8 to an-10 for the aeromotive filter and and adapter after that from an-10 to an-12 to the pickup line. I would also recomend using a return regulator near the front of the vechile, and not use the built in return regulator.
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Re: Compare these Fuel Filters................ ????
[Re: 69CHARGERMD]
#834150
10/19/10 09:57 PM
10/19/10 09:57 PM
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Joined: Oct 2003
Posts: 11,686 W. Kentucky
justinp61
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Quote:
The filter is plumbed BEFORE the pump
Doug I tried a System 1 30 micron 8 an filter before the pump when I re-did my fuel system this spring. The fuel pressure would drop to 0 going down my drive way, I removed it and everything is fine. Now I have a $90 piece of tool box art.
I think Challenger 1 is right on this one, 100 micron before the pump.
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Re: Compare these Fuel Filters................ ????
[Re: justinp61]
#834151
10/19/10 10:07 PM
10/19/10 10:07 PM
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W5Duster436
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When I put in the Aeromotive setup they advised me of also putting the 100 Micron before the pump and then I have a 30 micron system1 at the carb. Quote:
Quote:
The filter is plumbed BEFORE the pump
Doug I tried a System 1 30 micron 8 an filter before the pump when I re-did my fuel system this spring. The fuel pressure would drop to 0 going down my drive way, I removed it and everything is fine. Now I have a $90 piece of tool box art.
I think Challenger 1 is right on this one, 100 micron before the pump.
'70 Duster - SDSS 436 W5 4spd (Gone) '71 Dodge D100 '70 Dodge W100
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Re: Compare these Fuel Filters................ ????
[Re: 69CHARGERMD]
#834154
10/19/10 10:29 PM
10/19/10 10:29 PM
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Posts: 4,616 Kissimmee Fl.
dusturbd340W5
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I am running the mallory 140 filter before there 140 pump and have had 0 problems so far idle pressure is 8-9 lbs and never seen it lower than 7.5 at end of run this is a return style system.
70 duster full chassis super pro 416 CNC Indybrock heads 727 w/brake
best so far 1.212 60 6.219 in 1/8 at 110.88 9.768 at 137.81 1/4
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Re: Compare these Fuel Filters................ ????
[Re: 69CHARGERMD]
#834156
10/19/10 10:50 PM
10/19/10 10:50 PM
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Crizila
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I run a 40 micron filter like the in-line summit ( only it's a Russell ) and pump through it with a 150gph Holley pump. At 12 volts, I free flow exactly 1 gallon in 30 seconds. Enough for an 11 second car. I also check it often due to the small surface area of the screen. I'd be stepping up to something bigger if I were running faster though. A flow test will tell you what you wanna know for sure.
Fastest 300
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Re: Compare these Fuel Filters................ ????
[Re: 69CHARGERMD]
#834157
10/19/10 10:55 PM
10/19/10 10:55 PM
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MR_P_BODY
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Quote:
Looks like alot of people are running a 100 micron filter ??
Doug I use the brass screen style filter prior to the pump... I call them tree collectors
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Re: Compare these Fuel Filters................ ????
[Re: MR_P_BODY]
#834158
10/19/10 11:03 PM
10/19/10 11:03 PM
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Joined: Jan 2003
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69CHARGERMD
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I think I am going to order a Aeromotive 12304 filter (100 micron) and be done with it. I was reading the Aeromotive website,,,very helpful,,,,they stress NOT using a filter element "finer" than 100 micron on the inlet side of the pump, and to have a large surface area type filter. Thanks for all the info,,,,I will keep you posted on the results,,, Doug http://aeromotiveinc.com/2010/01/fuel-filtration/
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Re: Compare these Fuel Filters................ ????
[Re: BradH]
#834161
10/20/10 01:54 AM
10/20/10 01:54 AM
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Joined: Feb 2003
Posts: 1,646 Ontario,Canada
firefighter3931
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Quote:
I run the large 40-micron version shown here before (pre-filter) a Mallory 140 pump: http://www.robbmcperformance.com/products/filters.html
Same here....this is what Rob recommended to me when using a gerator style pump. I have a Mallory 250.
Doug, the bypass may be dumping too much fuel. Check the pressure at the regulator inlet and do a flow test. I'm gonna check mine just to be sure
Ron
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