Air Dog Install

[PKnoerzer]

I have an Air Dog coming to replace my lift pump. My question is - should I leave the stock lift pump in place for a back up, or can I remove it to clean up under the hood?

 

[AH64ID]

I have an Air Dog coming to replace my lift pump. My question is - should I leave the stock lift pump in place for a back up, or can I remove it to clean up under the hood?

I would leave it in. The AD f/w sep filter does not meet OE spec for f/w separation.

 

[PKnoerzer]

So I would have to plumb the Air Dog in-line with the factory pump? Will the factory pump restrict the flow?

 

[HOBrian]

I would leave it in. The AD f/w sep filter does not meet OE spec for f/w separation.

I do not want to come off as if I am FLAMING you and your data, but I do have a couple of questions.



1. IF the stock system is so much better (then fill your aftermarket lift pump here) why do we see soooo many injector problems not being covered under warr. because of water?



2. Maybe I should ask AD this but what makes the stock system better?

A. Is it the filter media itself that is better?

B. Is the design of the housing for the stock filter/WS that much better?



REASON why I ask...



I have and AD100 waiting to go in and because of you I am now thinking of running it through the stock filter housing. I was loking forward to taking the whole thing out for a cleaner look. . but now I am rethinking this. :-laf

 

[AH64ID]

So I would have to plumb the Air Dog in-line with the factory pump? Will the factory pump restrict the flow?

Not the factory pump, but the factory filter. The factory filter is rated for the same flow as the fuel filter on the AD, and for higher flow than the f/w sep.

I do not want to come off as if I am FLAMING you and your data, but I do have a couple of questions.



1. IF the stock system is so much better (then fill your aftermarket lift pump here) why do we see soooo many injector problems not being covered under warr. because of water?



2. Maybe I should ask AD this but what makes the stock system better?

A. Is it the filter media itself that is better?

B. Is the design of the housing for the stock filter/WS that much better?



REASON why I ask...



I have and AD100 waiting to go in and because of you I am now thinking of running it through the stock filter housing. I was loking forward to taking the whole thing out for a cleaner look. . but now I am rethinking this. :-laf

Here are a couple of threads on the subject



Fuel filter micron rating - Page 2 - Dodge Cummins Diesel Forum



Fuel Water Separation - Dodge Cummins Diesel Forum



The final fuel filtering of the AD is better than stock, but the f/w separation is worse. Its only 50% of free water and 0% of emulsified, OE spec is 95% for both free and emulsified water. Unless your talking HUGE power you can get the fuel to flow thru the OE canister at a good rate with a big line kit, and the OE filter should be getting clean fuel and only be separating water.

 

[PKnoerzer]

Thanks AH64ID for posting the links - there's a lot of info there.



My truck has the pump on the filter. Is there an adapter that will allow me to remove it and plumb into the filter?

 

[AH64ID]

Thanks AH64ID for posting the links - there's a lot of info there.



My truck has the pump on the filter. Is there an adapter that will allow me to remove it and plumb into the filter?

Yes, I believe the AD has that option.

 

[SShafranko]

What model AD are you getting?

 

[PKnoerzer]

I got the AD100. It doesn't have a fitting to adapt to the factory filter and it recommends bypassing. I thought I was going to get better filtration, but the water separater has me confused. Any comments from those that bypassed the factory filter?

 

[firemansdiesel]

I got the AD100. It doesn't have a fitting to adapt to the factory filter and it recommends bypassing. I thought I was going to get better filtration, but the water separater has me confused. Any comments from those that bypassed the factory filter?

Call Charlie at Pure Flow and get an 1/2" adaptor fitting for the back of the stock filter housing. The same one that comes w/ the Raptor set up. I had a Rator 100 then upgraded to the AD100. I left the line from the motor mount to the stock filter housing instead of going straight to the CP3.



I did take the stock 7 micron out the other day to see if there is any restriction. There is some, so I left it out for good.

 

[TimothyLong]

Call Charlie at Pure Flow and get an 1/2" adaptor fitting for the back of the stock filter housing. The same one that comes w/ the Raptor set up. I had a Rator 100 then upgraded to the AD100. I left the line from the motor mount to the stock filter housing instead of going straight to the CP3.



I did take the stock 7 micron out the other day to see if there is any restriction. There is some, so I left it out for good.

Firemansdiesel, when you took the stock filter out did you notice a bit of a fuel pressure increase? If so, by how much? I've been following this thread with a lot of interest. I'm planning on getting an AD100 and want to run it through the factory filter housing without the factory filter too. Mainly for the fuel heater now that it's gotten cold out. However, I've been rethinking that since reading this thread. BTW, thanks for the tip on the 1/2" adapter fitting!

 

[firemansdiesel]

Firemansdiesel, when you took the stock filter out did you notice a bit of a fuel pressure increase? If so, by how much? I've been following this thread with a lot of interest. I'm planning on getting an AD100 and want to run it through the factory filter housing without the factory filter too. Mainly for the fuel heater now that it's gotten cold out. However, I've been rethinking that since reading this thread. BTW, thanks for the tip on the 1/2" adapter fitting!

I have a low pressure light and not an actual mechanical guage for ideal readings, but when I had the filter in the stock housing. Around 1/4 tank my light would flicker or stay on for a few seconds and kick off. Then repeat the cycle until I filled up. So at times I was getting atleast 5 psi or lower. My truck would not stumble or die, but annoying flicker of the light. After talking to Charlie at Pure Flow. I took the stock filter out and at the same level of around 1/4 tank. No light, so I figured the stock 7 micron has some restriction when the tank gets low.



Remember that the AD100 & Raptor 100 use the same motor and same GPH. The only difference is the filter location (regardless of the micron size). If the Raptor can supply the CP3 correctly through the stock filter housing and then I can see why not the AD100 can't (w/o the stock filter). Except better filtration w/ the AD100. The Raptor uses the same 1/2" hose as the AD100 and it gets installed straight to the filter housing. I had 16 psi at idle and WOT 13 psi and went back to 16 psi w/ the Raptor 100 (had a guage h/u). So the AD100 is h/u the same way and should have the same psi since it's the same motor w/o the second filter (stocker in the way).



I also have the Jeep Liberty Canister installed.

 

[TimothyLong]

I have a low pressure light and not an actual mechanical guage for ideal readings, but when I had the filter in the stock housing. Around 1/4 tank my light would flicker or stay on for a few seconds and kick off. Then repeat the cycle until I filled up. So at times I was getting atleast 5 psi or lower. My truck would not stumble or die, but annoying flicker of the light. After talking to Charlie at Pure Flow. I took the stock filter out and at the same level of around 1/4 tank. No light, so I figured the stock 7 micron has some restriction when the tank gets low.



Remember that the AD100 & Raptor 100 use the same motor and same GPH. The only difference is the filter location (regardless of the micron size). If the Raptor can supply the CP3 correctly through the stock filter housing and then I can see why not the AD100 can't (w/o the stock filter). Except better filtration w/ the AD100. The Raptor uses the same 1/2" hose as the AD100 and it gets installed straight to the filter housing. I had 16 psi at idle and WOT 13 psi and went back to 16 psi w/ the Raptor 100 (had a guage h/u). So the AD100 is h/u the same way and should have the same psi since it's the same motor w/o the second filter (stocker in the way).



I also have the Jeep Liberty Canister installed.

Thanks for the info!

 

[AMcCormick]

Seems like the big question is water seperation. Just a thought, could you run a "Racor" marine filter/water seperator before the AD? The Racor untits have a nice water trap with an easy drain. used them on some Yamaha outboards putting between 2-6hrs a day 5 days a week. just a thought.

 

[HOBrian]

Mainly for the fuel heater now that it's gotten cold out.

If the only reason you want to run through the factory unit is for the fule heater, don't bother. The fule heater is for the stock filter it keeps it from gelling up. It does nothing for the cp3.

 

[PKnoerzer]

Call Charlie at Pure Flow and get an 1/2" adaptor fitting for the back of the stock filter housing. The same one that comes w/ the Raptor set up. I had a Rator 100 then upgraded to the AD100. I left the line from the motor mount to the stock filter housing instead of going straight to the CP3.



I did take the stock 7 micron out the other day to see if there is any restriction. There is some, so I left it out for good.

Thanks - how did you wire up the AD100? Did you use the supplied harness that plugs into the factory pump wiring?

 

[firemansdiesel]

Thanks - how did you wire up the AD100? Did you use the supplied harness that plugs into the factory pump wiring?

I believe your harness is different than mine between a 2004 & 2005.

 

[bcdiesel]

I'm picking up my AD100 next week. I've been reading a lot of threads on other sites about 1/4 tank fuel delivery problems where the AD or Fass drains the canister before it can slosh back in to fill. Is this just a problem in the trucks that had to remove the in tank pump, or would this also be a problem in a 03 or 04 without the tank mounted pump? People with the newer trucks have done Liberty canister mods but mentioned something about having to do that because of removing baffles when the tank mounted pump came out.

 

[firemansdiesel]

I'm picking up my AD100 next week. I've been reading a lot of threads on other sites about 1/4 tank fuel delivery problems where the AD or Fass drains the canister before it can slosh back in to fill. Is this just a problem in the trucks that had to remove the in tank pump, or would this also be a problem in a 03 or 04 without the tank mounted pump? People with the newer trucks have done Liberty canister mods but mentioned something about having to do that because of removing baffles when the tank mounted pump came out.

As long as you didn't relocate the pump in tank (stocker). You will have no issues w/ the '03.

 

[bcdiesel]

As long as you didn't relocate the pump in tank (stocker). You will have no issues w/ the '03.

Thanks, that's good. Any idea why that is though? What's different about the 03/04 canister that makes it work?