Is the Mallory geroter pump installed correctly? It quit..
#2732205
01/11/20 05:57 PM
01/11/20 05:57 PM
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Joined: Jul 2005
Posts: 1,954 Blairsden, CA
Triggerfish
OP
top fuel
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OP
top fuel
Joined: Jul 2005
Posts: 1,954
Blairsden, CA
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The new geroter pump in my custom D100's fresh 383 quit pumping & my body guy can't get it out of the shop, so I'm wondering if its forward of the tank position instead of behind it is what's causing it?? And I just realized I got their $430 comp pump instead of the $230 one that's in my W100! Hope I don't have to reposition the pump since the tank is at the rear of the frame. Thanks for any advice..
Last edited by Triggerfish; 01/11/20 06:00 PM.
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Re: Is the Mallory geroter pump installed correctly? It quit..
[Re: Triggerfish]
#2732230
01/11/20 07:10 PM
01/11/20 07:10 PM
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Joined: Jan 2003
Posts: 14,506 So. Burlington, Vt.
fast68plymouth
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I Live Here
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So. Burlington, Vt.
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Imo, the pump is waaaay too far away from the tank, and too high up as well.
If it’s the 250 pump, it really needs to be used with at least a bypass return return system at the pump.
The best solution for where that tank is, is to use a submersible in take pump.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Is the Mallory geroter pump installed correctly? It quit..
[Re: Triggerfish]
#2732251
01/11/20 08:33 PM
01/11/20 08:33 PM
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Joined: Jan 2003
Posts: 14,506 So. Burlington, Vt.
fast68plymouth
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I Live Here
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So. Burlington, Vt.
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Most of that style of pumps aren’t very happy lifting fuel up and out of a deep tank. They’re much better at pushing it out.
There are a few vendors that would have in tank pumps that would be a better option.
Walbro makes quite a few varieties of them.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Is the Mallory geroter pump installed correctly? It quit..
[Re: AndyF]
#2732983
01/14/20 03:00 PM
01/14/20 03:00 PM
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Joined: Jul 2005
Posts: 1,954 Blairsden, CA
Triggerfish
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Joined: Jul 2005
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Blairsden, CA
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Thanks guys for your help & to save $$ from doing the in tank pump conversion, I'll try what the Mallory tech advised & because he said the pump will work if I reposition it between the tank & filter & I shouldn't have to reposition the tank inlet & outlets to the bottom of the tank. SO, we'll soon see if it works & hope my friend can get to it soon. Originally, I wanted to put the tank where the battery is now & then I could've put the pump behind it, but "saving money" to work with the tank I had was the wrong choice for sure! If I wasn't going to sell the D100, I'd get a custom fuel cell that fits in the middle & it'd look much better from the rear.
Last edited by Triggerfish; 01/14/20 03:13 PM.
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Re: Is the Mallory geroter pump installed correctly? It quit..
[Re: Triggerfish]
#2732993
01/14/20 03:13 PM
01/14/20 03:13 PM
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Joined: Aug 2003
Posts: 43,223 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,223
Bend,OR USA
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Is that fuel filter a Fram or a chinese clone of the Fram? If so does it have a paper element in it? If so change it to a 100 micron or larger element. The paper fuel filter elements are all 10 micron or smaller which really limits the fuel flow through them when sucking the fuel from the tank to the pump, I learned that lesson the hard way once Install it in front of pump going to the carb or fuel pressure regulator and use a 100 micron or larger filter between the pump and tank
Last edited by Cab_Burge; 01/14/20 03:13 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Is the Mallory geroter pump installed correctly? It quit..
[Re: Cab_Burge]
#2733001
01/14/20 03:18 PM
01/14/20 03:18 PM
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Joined: Jul 2005
Posts: 1,954 Blairsden, CA
Triggerfish
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top fuel
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OP
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Joined: Jul 2005
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Blairsden, CA
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Is that fuel filter a Fram or a chinese clone of the Fram? If so does it have a paper element in it? If so change it to a 100 micron or larger element. The paper fuel filter elements are all 10 micron or smaller which really limits the fuel flow through them when sucking the fuel from the tank to the pump, I learned that lesson the hard way once Install it in front of pump going to the carb or fuel pressure regulator and use a 100 micron or larger filter between the pump and tank Thanks Cab & I can't remember the manufacturer but think it was a Summit brand I got about 17 yrs ago for a 69 Charger R/T project I was doing & kept it brand new in the box till 2 mos ago. I'll sure check the filter & maybe just replace it whth a 100 micron filter. ** New Info: Cab, it is a Summit brand, made in China with paper 10 micron filter, so a new filter and moving the pump will be what we do first. What you said was a little confusing about where the filter should go: "..Install it in front of pump going to the carb or fuel pressure regulator and use a 100 micron or larger filter between the pump and tank [/quote]"... So should the pump be in front of the filter or behind it? Thanks for the info!
Last edited by Triggerfish; 01/14/20 07:37 PM. Reason: more info
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Re: Is the Mallory geroter pump installed correctly? It quit..
[Re: Cab_Burge]
#2733681
01/16/20 04:50 PM
01/16/20 04:50 PM
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Joined: Jul 2005
Posts: 1,954 Blairsden, CA
Triggerfish
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top fuel
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OP
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Joined: Jul 2005
Posts: 1,954
Blairsden, CA
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Cab, I think I'll put the pump where the filter is now since they're about the same size & mounting setup & I'm thinking of putting this Holley 100 micro scree filter where the exixting pump is now. Filter's $80 so that's a lot less than a new pump.
Last edited by Triggerfish; 01/16/20 07:06 PM.
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Re: Is the Mallory geroter pump installed correctly? It quit..
[Re: Triggerfish]
#2734482
01/19/20 01:32 PM
01/19/20 01:32 PM
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Joined: Dec 2004
Posts: 10,555 Rittman Ohio
fourgearsavoy
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Rittman Ohio
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All the stuff you have already will work but the location of the parts is the problem. That pump needs to be gravity fed and it will work great in your application. An in tank pump would work the best for your rod the way you have it plumped and your type of fuel call. You could use a check valve to keep fuel in the lines and pump but a gravity feed to a g-rotor is still the best choice if you don't go with an in-tank pump like the Aeromotive Stealth pump and filter combo Gus
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
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