Air dog II

[Msims02]

Will it hurt anything to go ahead and install the airdog still running stock injectors and turbo until I get the pmax and injectors in? My truck is goin in for surgery feb. 1st getting studs and gaskets and want the the injectors and turbo by then! Any help greatly appreciated


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[fordfan30]

The sooner the better

[shu873]

Add it now. Not only will it not hurt anything, it's better fuel delivery then the stock HFCM. Even stock injectors can cause you to drop fuel pressure with a hot tune.

[Term3]

I installed an AD2 long before I did any other mods. I do however recommend a fuel tank sump, not absolutely necessary but a good idea. http://www.alligatorperformance.com/...?cPath=192_309

[Msims02]

Thanks very much guys! Prolly gunna order the billet sump also!


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[windrunner408]

Originally Posted by shu873

Add it now. Not only will it not hurt anything, it's better fuel delivery then the stock HFCM. Even stock injectors can cause you to drop fuel pressure with a hot tune.

Either my TSD SPD must not be that hot of a tune or my stock HFCM is on steroids or my RR kit actually supplies more fuel to the heads because I have my fuel pressure set at ~60psi and it drops maybe 2psi on a WOT run.

An AD2 is probably good for removing air in the fuel and having the ability to deliver a larger amount of fuel than the stock HFCM, but IMO the stock delivery system is where your hugest restriction is and a RR kit is needed regardless of what type of fuel pump you run. While I dont have one yet, I also believe a sump is a very much needed item as well to remove A LOT of strain on the fuel pump from being required to suck/draw fuel up from the tank and to the pump. With a sump installed, hydrostatic pressure from the column of fuel in a full tank forces the fuel to the pump so it doesnt have to pull it itself. It is only when the tank getst near empty (i.e. the level in the tank gets below where the fuel pump is) that the fuel pump has to start pulling fuel again. So for probably 3/4 of the time, the fuel pump will see an easier lifestyle and in theory should last longer. JMOs.

[Msims02]

I actually try not to let my truck get below 1/4 tank now! Just an old habit lol


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[shu873]

Originally Posted by windrunner408

Either my TSD SPD must not be that hot of a tune or my stock HFCM is on steroids or my RR kit actually supplies more fuel to the heads because I have my fuel pressure set at ~60psi and it drops maybe 2psi on a WOT run.

An AD2 is probably good for removing air in the fuel and having the ability to deliver a larger amount of fuel than the stock HFCM, but IMO the stock delivery system is where your hugest restriction is and a RR kit is needed regardless of what type of fuel pump you run. While I dont have one yet, I also believe a sump is a very much needed item as well to remove A LOT of strain on the fuel pump from being required to suck/draw fuel up from the tank and to the pump. With a sump installed, hydrostatic pressure from the column of fuel in a full tank forces the fuel to the pump so it doesnt have to pull it itself. It is only when the tank getst near empty (i.e. the level in the tank gets below where the fuel pump is) that the fuel pump has to start pulling fuel again. So for probably 3/4 of the time, the fuel pump will see an easier lifestyle and in theory should last longer. JMOs.

I have a reg. return also with an Airdog 150 pushing the stock HFCM. Fuel pressure set to 58psi at idle. I see a 4psi decrease at WOT on my race file. I would tend to agree that the stock fuel delivery lines under the hood are a bit of a restriction as I used to loose about 10psi or more before I added a fuel system.

[risco]

so for a sump you just drill the bottom of the tank dosent weeken the tank... or what about being out in the woods could you catch the fuel line just hanging out the bottom of the tank

[Term3]

No it doesn't weaken it, as long as its installed correctly. I do a lot of back country roads and never had an issue but then I have mine piped up with 5/8" stainless steel tubing. I also now have the fuel return going thru a second outer tubing just to test out if it keeps the fuel warmer in cold weather since I no longer have the OEM heater.