Fuel filter questions
#1863040
07/03/15 08:32 PM
07/03/15 08:32 PM
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Joined: Nov 2011
Posts: 653 montana
pjc360
OP
mopar
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OP
mopar
Joined: Nov 2011
Posts: 653
montana
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I'm running a 300hp crate 360 magnum in my 91 power ram 150 4x4 short bed truck, I'm running a 30 gallon fuel tank, a off the shelf fuel pump from orielly auto parts, a quick fuel super street series 680cfm vacuum secondary carburetor. Carburetor has a fuel pressure gauge on the line and it runs at 6 psi most of the time, sometimes it will drop to around 4.5 to 5. Anyways when I first installed this carburetor I was only running one fuel filter, that was tied into the fuel hose after the fuel pump and before the carburetor, the fuel pressure gauge bounced around real bad, someone told me to put another fuel filter on the line that runs into the fuel pump just before the fuel pump and that should stop it, and it did. I had someone tell me today that I should only run one fuel filter, that the filter between the carb and fuel pump isn't nessasary and that I'm causing a restriction by running two filters the way I am. The one filter between the carb and fuel pump is a 3/8 Napa gold clear fuel filter, part number is 3003, the fuel filter between the tank and pump, that's installed real close before the pump is a 5/16 Napa gold clear fuel filter,Mozart number is 3002. Is this an issue? I didn't think it was and in fact I thought it would be better to have two of the fuel filters since they are cheap little filters anyways that probly don't filter all that well. I figured two would filter the fuel better then one, and I liked the idea of having the filter before the pump that way I'm not sucking any junk into the fuel pump, and I like the idea of the filter before the carb so I'm not sucking anything into the carb.
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Re: Fuel filter questions
[Re: pjc360]
#1863049
07/03/15 08:46 PM
07/03/15 08:46 PM
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Joined: Apr 2007
Posts: 905 SD
zrxkawboy
super stock
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super stock
Joined: Apr 2007
Posts: 905
SD
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I don't see the need for 2 filters.
It's Swifty! Swifty, you toad sucker!
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Re: Fuel filter questions
[Re: zrxkawboy]
#1863066
07/03/15 09:06 PM
07/03/15 09:06 PM
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Joined: Apr 2010
Posts: 4,154 bethlehem pa
mikemee1331
master
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master
Joined: Apr 2010
Posts: 4,154
bethlehem pa
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I don't see the need for 2 filters. you're probably right but i too run 2 filters. one before the electric fuel pump and one before the carbs. both are NAPA gold 3/8. i think the question was more about the 2 different sizes and you are fine with that too.
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Re: Fuel filter questions
[Re: pjc360]
#1863115
07/03/15 10:33 PM
07/03/15 10:33 PM
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Joined: Jan 2008
Posts: 3,886 Lost and Spaced
bboogieart
master
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master
Joined: Jan 2008
Posts: 3,886
Lost and Spaced
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R-U happy with the performance of the truck? If you are I would let sleeping dogs lie.
I have mechanical Aptitude. I can screw up anything.
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Re: Fuel filter questions
[Re: pjc360]
#1863265
07/04/15 02:02 AM
07/04/15 02:02 AM
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Joined: Aug 2003
Posts: 43,315 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,315
Bend,OR USA
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The clear palstic covered fuel filters burn a lot easier than the full metal covered ones do I use to run two of them on my old M.W. stocker, NHRA tech outlawed all plastic covered fuel filters under the hood on any of its cars participating at any other thier races back in the mid to late 1970s I would run one filter only other than what was stock in the fuel tank from the factory with a mechanicl pump The paper element fuel filters are 10 micron so that is a very fine filter I would run it like stock like Ron has suggested, better to push the fuel through it than to suck it through it
Last edited by Cab_Burge; 07/04/15 02:16 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Fuel filter questions
[Re: 383man]
#1863267
07/04/15 02:04 AM
07/04/15 02:04 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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unless the line ID is too small (not likely unless a high HP app which ain't the case here) so right now if you have enough psi at the carb INLET then you are good. What Lewt said, I'd want no filter before a mech pump and I would want a 100 micron before an electric pump then in either case a 10 micron filter right at the carb inlet. In your case a parts house Wix filter before the carb is fine (mech/not elect pump correct?) If elec & mech then the 100 micron before the elec is a good idea to protect it. You'd be surprised at the amount of crud that makes it thru gas stn pump filters
live every 24 hour block of time like it's your last day on earth
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