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Fuel filters

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Old 03-22-2015, 05:18 PM
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Default Fuel filters

Hey guys, how many filters are you using, on my current setup I'm using a mallory 250 pump with their pre filter that screws directly into the pump, should i also have another before the carb, trying to get it right before i install my new carb, show me some setup pics.
Old 03-23-2015, 05:11 AM
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Race gas is : 100 micron before pump and 10 micron after pump.
E85 fuel is : 100 micron before pump and a 40 micron after pump.
Old 03-26-2015, 12:06 PM
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Thanks..
Old 03-30-2015, 03:36 AM
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I have a magnafuel 85 micron before the pump and a moroso 40 micron after my pump. Pump gas.
Old 03-30-2015, 09:17 AM
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I'm using pump gas also, the prepump filter I'm using is the mallard the screws directly into the pump, its a 40 micron, want sure if I needed another one after the pump. I'm thinking of just adding one at the intake side of the regular up front.
Old 03-30-2015, 09:19 AM
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Originally Posted by turbodarryl
I'm using pump gas also, the prepump filter I'm using is the mallard the screws directly into the pump, its a 40 micron, want sure if I needed another one after the pump. I'm thinking of just adding one at the intake side of the regular up front.
never put a filter after the regulator. There could potentially be a pressure drop across the filter that the regulator wont be able to account for. put it as close to the regulator as possible on the inlet side.
Old 03-30-2015, 01:54 PM
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Very good advice, Thanks.
Old 04-21-2015, 01:42 PM
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FYI Mallory recommends a 40 micron prefilter before their gerotor pumps and a 100 micron before rotary vane pumps. Gerotors are more sensitive to debris than rotary vane.

Running a second, 10 micron after the pump is a good idea to protect the carb passages.
Old 04-21-2015, 02:46 PM
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Thats what I'm doing, im using a 40 micron mallory filter filter that screws directly into the mallory comp 250 that I'm using and I added a second 40 micron filter after the pump but in the front at the inlet of the regulator .



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