Compare these Fuel Filters.........(UPDATE)....... ????

Posted By: 69CHARGERMD

Compare these Fuel Filters.........(UPDATE)....... ???? - 10/20/10 01:04 AM

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 ?

Posted By: Dodgeguy101

Re: Compare these Fuel Filters................ ???? - 10/20/10 01:11 AM

Is the inline filter a pre filter and the others an after filter from the pump? This sis something I'm looking at to install in mine. Maybe 2 inline filters from the cell outlets to the pump and then a canister filter after the pump. If that is what you are doing, I would think you need 2 inline before the pump for flow. Just my thoughts.

Posted By: emarine01

Re: Compare these Fuel Filters................ ???? - 10/20/10 01:13 AM

It doesn't look like the summit filter has too much space before restricting fuel flow from trash, also it wont collect water like the Mallory

Posted By: Challenger 1

Re: Compare these Fuel Filters................ ???? - 10/20/10 01:19 AM

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

Posted By: DoubleD

Re: Compare these Fuel Filters................ ???? - 10/20/10 01:21 AM

are you running a bypass with that pump? did you replace your gauge? either filter is sufficient for what you are doing - other possibility is you may have a bad line - do the flow test! to me it seems like its your gauge acting up or the regulator

Posted By: MR_P_BODY

Re: Compare these Fuel Filters................ ???? - 10/20/10 01:25 AM

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

Posted By: 69CHARGERMD

Re: Compare these Fuel Filters................ ???? - 10/20/10 01:29 AM

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...

Posted By: ToddP

Re: Compare these Fuel Filters................ ???? - 10/20/10 01:30 AM

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.

Posted By: justinp61

Re: Compare these Fuel Filters................ ???? - 10/20/10 01:57 AM

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.

Posted By: W5Duster436

Re: Compare these Fuel Filters................ ???? - 10/20/10 02:07 AM

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.

Posted By: Thumperdart

Re: Compare these Fuel Filters................ ???? - 10/20/10 02:08 AM

I ran the Mallory 500 series before my billet holley pump and the pressure never dropped. I sold that whole system to a member on here and apparently solved his pressure drop issues. W/my new Aeromotive hot-rod pump, I run an Earls 85 micron in line pre-filter and my pressure actually goes UP a bit at idle when I nail the gas and never drops even at 7500 rpm`s.

Posted By: 69CHARGERMD

Re: Compare these Fuel Filters................ ???? - 10/20/10 02:21 AM

Looks like alot of people are running a 100 micron filter ??

Posted By: dusturbd340W5

Re: Compare these Fuel Filters................ ???? - 10/20/10 02:29 AM

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.

Posted By: Cab_Burge

Re: Compare these Fuel Filters................ ???? - 10/20/10 02:31 AM

Quote:

Looks like alot of people are running a 100 micron filter ??

I replaced my BG 500 filter(10 micron

) between the the tank and the pump with a Aeromotive 100 micron in line and my fuel suply issues went away

Posted By: Crizila

Re: Compare these Fuel Filters................ ???? - 10/20/10 02:50 AM

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.

Posted By: MR_P_BODY

Re: Compare these Fuel Filters................ ???? - 10/20/10 02:55 AM

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

Posted By: 69CHARGERMD

Re: Compare these Fuel Filters................ ???? - 10/20/10 03:03 AM

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/

Posted By: BradH

Re: Compare these Fuel Filters................ ???? - 10/20/10 03:04 AM

I run the large 40-micron version shown here before (pre-filter) a Mallory 140 pump: http://www.robbmcperformance.com/products/filters.html

Posted By: rickstershemi

Re: Compare these Fuel Filters................ ???? - 10/20/10 03:09 AM

I ran a 10an 100 micron after the pump, but I filter all my fuel coming out of the fuel jug....never any problems

Rickster

Posted By: firefighter3931

Re: Compare these Fuel Filters................ ???? - 10/20/10 05:54 AM

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

Posted By: jamesc

Re: Compare these Fuel Filters................ ???? - 10/20/10 02:55 PM

Quote:

I know alot guys will come on here and tell me I'm wrong, am I? Nope

i'm one of them, running .004" junk through that mallory 250 is a bad idea. personally i think that's one of the best pumps money can buy.

he states he's losing fuel pressure while driving around the pits. if it's a filter problem it's all but plugged solid. imho the filter is not the issue, that's a fuel management issue. also i would never use anything but a screen in front of the pump. some people use paper elements which are meant to be used after the pump.

Posted By: gsmopar

Re: Compare these Fuel Filters................ ???? - 10/20/10 03:04 PM

I'm running the inline Jegs/Summit filters. I think they list a couple sizes and I went with the largest that was compatible with Alcohol (incase I run E85 later). No issues so far, fuel pressure is rock solid:

Posted By: 69CHARGERMD

Re: Compare these Fuel Filters................ ???? - 10/20/10 04:01 PM

http://aeromotiveinc.com/2010/01/fuel-filtration/

Posted By: ZIPPY

Re: Compare these Fuel Filters................ ???? - 10/20/10 04:23 PM

I have the 250 pump and the 500 filter....

Posted By: Crizila

Re: Compare these Fuel Filters................ ???? - 10/20/10 05:23 PM

Quote:

I'm running the inline Jegs/Summit filters. I think they list a couple sizes and I went with the largest that was compatible with Alcohol (incase I run E85 later). No issues so far, fuel pressure is rock solid:

Looks like you are running two different types of pumps, vane and gerotor. Could I ask why?

Posted By: gsmopar

Re: Compare these Fuel Filters................ ???? - 10/21/10 02:26 PM

Quote:

Quote:

I'm running the inline Jegs/Summit filters. I think they list a couple sizes and I went with the largest that was compatible with Alcohol (incase I run E85 later). No issues so far, fuel pressure is rock solid:

Looks like you are running two different types of pumps, vane and gerotor. Could I ask why?

Dedicated fuel system for the Nitrous. They're different, because that what I had available at the time. No issues with either.

Posted By: Crizila

Re: Compare these Fuel Filters................ ???? - 10/21/10 03:45 PM

OK, Thanks.

Posted By: 69CHARGERMD

Re: Compare these Fuel Filters................ ???? - 10/22/10 12:23 AM

Update 10/21

I installed the Aeromotive 100 micron filter.
Pics show the new Mallory 250 pump.
Also upgraded the vent to -8

Heading out to the track soon,,,,,,

(also going to check the bypass)

Posted By: mopar65

Re: Compare these Fuel Filters................ ???? - 10/22/10 12:32 AM

looka great doug. I hope you get your 9 second pass next time out. mopar65

Posted By: Challenger 1

Re: Compare these Fuel Filters................ ???? - 10/22/10 02:04 AM

Looks nice.

But I must mention that the inlet line should be bigger than the outlet on a racing fuel system. It should be a #10 inlet.

If it still gives you trouble, that's where I would look.
Good luck at the track!!

Posted By: DoubleD

Re: Compare these Fuel Filters................ ???? - 10/22/10 02:35 AM

That will do for now - but please get that filter mounted solid - thats too much mass hanging off the pump by a AN fitting - You don't want that thing breaking off mid flight on a 9 second pass. Good luck! - you also might want to try the 37 squitters if you got time.

Posted By: 69CHARGERMD

Re: Compare these Fuel Filters................ ???? - 10/22/10 02:40 AM

I had no idea the filter was that large,,

, till i opened the box...yikes,,

I thought the same thing about finding something to "mount" it,,might fab up a bracket,,,something like this....

ps,,,i went to a 40 squirter ( 45,,,to 42,,,,and then 40 ) and the car really liked it,,,,
I have a set of 37's ready to go,,,going to experiment next time out,,, much more "responsive" off the line,,,good call at Norwalk....

Posted By: onebaddakota

Re: Compare these Fuel Filters................ ???? - 10/22/10 02:55 AM

I recently talked to an aeromotive engineer about this very subject. He said DO NOT run less than a 100 micron filter PREpump. They cavitate and reduce output. They will eventually kill the pump. They want a 100 micron prepump and a 40 micron post pump to protect the carb.

Posted By: Cab_Burge

Re: Compare these Fuel Filters................ ???? - 10/22/10 03:35 AM

Are you still running two fuel pumps? If so I think you should mount the other pump behind the fuel outet like the new Mallory is now

Posted By: firefighter3931

Re: Compare these Fuel Filters................ ???? - 10/22/10 01:44 PM

Quote:

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

Mallory recommends a 40 micron filter for their MA 250 pump....it's right in the instructions.

I believe the Aeromotive pumps are rotary vane so that might explain the 100 micron recommendation from them ?

Ron

Posted By: Challenger 1

Re: Compare these Fuel Filters................ ???? - 10/22/10 01:53 PM

Quote:

Quote:

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

Mallory recommends a 40 micron filter for their MA 250 pump....it's right in the instructions.

I believe the Aeromotive pumps are rotary vane so that might explain the 100 micron recommendation from them ?

Ron

From what I just looked up, Mallory recomends a 100 micron filter before the pump also. High performance fuel pumps require the same IMO. If yours is working OK with a more restrictive filter, then you are not making enough HP to notice.

To the OP, FWIW Kinsler recomends not to mount filters directly to a fuel pump, because vibration can cause the filter element to bounce around inside allowing dirt to get by. I believe most are held in place by springs.

web page
web page

Posted By: ZIPPY

Re: Compare these Fuel Filters................ ???? - 10/22/10 03:04 PM

Seems to me their I sheets are messed up in a few places...

...in one area they do say use a 100 micron filter...

Then in another area they say...

Quote:

To prolong pump life and efficiency, a high volume fuel filter
such as the Mallory COMP FILTER� Series 500 Fuel Filter
(Part No. 3500) must be installed between the pump and
fuel tank.

Then as it turns out, there's no such thing as part number 3500

The closest a person can get is 3500M, which is This, which is 40 microns, which contradicts what they stated earlier in the I sheet.

Nice.

Also compare figure 2 and figure 3 on the I sheet. Figure 2 is "With standard regulator" , Figure 3 is "with regular style fuel pressure regulator". I guess my question is, what is the difference between standard and regular?

Gee, could it be they meant "return" instead of "regular"?

Lots of mistakes on that I sheet!

Posted By: Challenger 1

Re: Compare these Fuel Filters................ ???? - 10/22/10 09:10 PM

All I know is,this. If you want a hi flow fuel system for gasoline, then it's not advisable to try to suck it thru anything much finer that 75-100 microns.

Sure if you have a reg old fuel pump for maybe 300 hp then you will never notice if your sucking thru a finer filter. Except for increased noise and shorter pump life.

Gas is hardest to move and vaporizes(cavitates) very easy. Give your pump plenty of unrestricted flow and it won't let you down.

If your pump has a #8 inlet, use a #8 straight X #10 male flare to attach your #10 supply hose. Your pump will thank you.