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Re: Compare these Fuel Filters................ ????
[Re: firefighter3931]
#834162
10/20/10 09:55 AM
10/20/10 09:55 AM
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Joined: Jan 2003
Posts: 5,875
communist bloc of new jersey
jamesc
master
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master
Joined: Jan 2003
Posts: 5,875
communist bloc of new jersey
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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.
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Re: Compare these Fuel Filters................ ????
[Re: 69CHARGERMD]
#834165
10/20/10 11:23 AM
10/20/10 11:23 AM
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Joined: Jan 2003
Posts: 18,049
S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 18,049
S.E. Michigan
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I have the 250 pump and the 500 filter....
Rich H.
Esse Quam Videri
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Re: Compare these Fuel Filters................ ????
[Re: Crizila]
#834167
10/21/10 09:26 AM
10/21/10 09:26 AM
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Joined: Jul 2004
Posts: 1,145
Arizona, USA
gsmopar
super stock
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super stock
Joined: Jul 2004
Posts: 1,145
Arizona, USA
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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.
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Re: Compare these Fuel Filters................ ????
[Re: gsmopar]
#834169
10/21/10 07:23 PM
10/21/10 07:23 PM
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Joined: Jan 2003
Posts: 4,852
KENTUCKY
69CHARGERMD
OP
master
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OP
master
Joined: Jan 2003
Posts: 4,852
KENTUCKY
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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)   
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Re: Compare these Fuel Filters................ ????
[Re: 69CHARGERMD]
#834171
10/21/10 09:04 PM
10/21/10 09:04 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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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!!
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Re: Compare these Fuel Filters................ ????
[Re: DoubleD]
#834173
10/21/10 09:40 PM
10/21/10 09:40 PM
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Joined: Jan 2003
Posts: 4,852
KENTUCKY
69CHARGERMD
OP
master
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OP
master
Joined: Jan 2003
Posts: 4,852
KENTUCKY
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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.... 
Last edited by 69CHARGERMD; 10/21/10 09:44 PM.
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Re: Compare these Fuel Filters................ ????
[Re: 69CHARGERMD]
#834174
10/21/10 09:55 PM
10/21/10 09:55 PM
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Joined: Nov 2004
Posts: 226
lino lakes,MN
onebaddakota
enthusiast
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enthusiast
Joined: Nov 2004
Posts: 226
lino lakes,MN
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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.
10.56 at 125.6, with a 1.43 60 ft.
E85, Hyd. Roller 410 magnum,full exhaust, 3500 race weight.
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Re: Compare these Fuel Filters................ ????
[Re: 69CHARGERMD]
#834175
10/21/10 10:35 PM
10/21/10 10:35 PM
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Joined: Aug 2003
Posts: 43,913
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,913
Bend,OR USA
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Last edited by Cab_Burge; 10/21/10 10:36 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Compare these Fuel Filters................ ????
[Re: Challenger 1]
#834176
10/22/10 08:44 AM
10/22/10 08:44 AM
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Joined: Feb 2003
Posts: 1,646
Ontario,Canada
firefighter3931
top fuel
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top fuel
Joined: Feb 2003
Posts: 1,646
Ontario,Canada
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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
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Re: Compare these Fuel Filters................ ????
[Re: Challenger 1]
#834178
10/22/10 10:04 AM
10/22/10 10:04 AM
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Joined: Jan 2003
Posts: 18,049
S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 18,049
S.E. Michigan
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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 FILTERŪ 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!
Rich H.
Esse Quam Videri
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Re: Compare these Fuel Filters................ ????
[Re: ZIPPY]
#834179
10/22/10 04:10 PM
10/22/10 04:10 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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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.
Last edited by Challenger 1; 10/23/10 11:17 AM.
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