Picking the correct lift pump and sump kit for my application. Do I need a sump?

[hogzillanator]

I put this in the noob section originally. This might be a more appropriate place. Sorry about that

I'm wanting to add either a FASS or Air Dog lift pump system and was wanting some sump kit advice as well.

The truck is a stock 2010 3500 dually 350 horse 6.7 with the G56 6 speed that pulls and hauls heavy weight about half the time.

I watched several pros and cons videos respective to the two systems.

Looks like the FASS has bigger 5/8" vs 1/2" fittings and thicker 10 gauge wiring per the owner and something about the radiuses and bends vs sharp 90s adding cavitation (not sure about all that last part).

Looks like the FASS has bigger filters and motor but also a bigger profile hanging down underneath.

Looks like the Air Dog suction line gets drilled into the top of the sending unit whereas the FASS gets drilled into the tank itself. I think returns are thru stock returns is that correct?

Seems like I would be worried about getting the suction line spacing relative to the bottom of the tank right. Is the thickness of a quarter enough?

Regarding sumps I see the wisdom of gravity feeding vs sucking thru a straw but what about sediments?

Based on my vehicle and what I use it for, what recommendation would y'all have for a lift pump and sump and do I need a sump?

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[ZeroSignal]

I've been researching the same topic.

From what I've found, the biggest advantage of running a sump is avoiding starving the pump when your fuel tank gets low.

Folks have reported instances where the draw straw will suck air when the fuel level is low.

Personally, I don't let my truck get below 1/4 tank, but I can see the advantage of having a sump for that occasion where you have to go a little extra distance between fill ups.

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[AnOldBiker]

I've been thinking of this as well. I've had the level below 1/4, but not by much. Sediment in a sump has been my concern. If no sump, then sediment would be spread throughout the bottom of the tank, pulling smaller amount over time. The biggest concern is loosing liquid suction, destroying the down stream pumps ... and their cost. So far I have considered no sump and never going to low on fuel.

Many have told me just over the thickness of a dime from the draw straw and the bottom of the tank is fine, but cut a very small v-notch on two sides of the draw straw end to guarantee liquid flow.

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[TexNeck]

Sump 100%- when you drill your hole for the sump take some time and clean the tank.

At that point all old sediment is gone and whatever new sediment comes with fuel will be caught by filters/separators. you can tell yourself that you won’t get low on fuel but if you take trips and aren’t familiar with fueling stops sometimes you end up stretching it.

Can’t put a price on piece of mind!

For $100 -$200 for a sump it’s worth it IMO.

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[cumminsdieselfreak]

FWIW I recommend the sump from Beans Diesel.

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[Champs 6.7]

I have been running the Airdog 4G2 165GPH and G&R sump now for 10k miles no issues.

Super easy install and has both the feed and return built into the sump which makes it very easy to hook up the air dog.

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[Mega Man]

Trying to learn.

Can I ask why no one uses the fleece oem type drop in pump?

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[quad4x4]

I installed a 95 Gal FASS system.

Mine has the engine mount pump and filter.

Hooked up the the stock draw straw.

No issues pulls plenty of fuel for my mods.

The filters are short in length with the new units. Unit is whisper quiet.

Very pleased with fass.

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[windsearcher]

had a sump in my 98.5 after my first Air Dog burned up sucking through a "straw"...... Plenty of people put in a new pick up pipe, and it's possible maybe I got low in fuel, but usually don't let it get much below 1/4 if any.
With the sump, was a lot happier with a little more piece of mind. Even though an older truck, there wasn't much sediment in the tank when the sump was put in. Surprisingly little actually.

Really liked the easy on/off of the fuel filter and water drain access. Will hope to put one on my '17 soon.

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[TexNeck]

Trying to learn.

Can I ask why no one uses the fleece oem type drop in pump?

Can I ask why no one uses the fleece oem type drop in pump?[/QUOTE]

Mostly ease of installation and filtration. With an air dog/Fass you do not need to drop the tank to install. The sump is installed on the bottom of the tank and the pump on the frame rail. At most you may need to loosen some of the tank bolts to unhook factory harness on top of tank which is no big deal really.

As far as filtration the Fass/airdog have filters built onto their pumps on the frame rail. You can interchange brands of filters as well as choose a superior micron filter if desired.

with the in tank unit you keep factory filter locations/filters.

Its been a while since I priced fleece pump but cost is the same if not a bit lower last I knew with the air dog/Fass style

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