Fuel System.. FASS.. Regulated...
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Postmaster
Joined: Apr 2006
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From: Neptune Beach, FL
Fuel System.. FASS.. Regulated...
So how many people here run larger Injectors, Stage 2, Stage 3 with the FASS System and Regulated Return?
Does the system keep your Fuel Pressure up so your not starving the injectors?
Would you do it differently if you could?
Does the system keep your Fuel Pressure up so your not starving the injectors?
Would you do it differently if you could?
Hotshot
Joined: Dec 2003
Posts: 15,368
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From: Stuttgart, Ar
The FASS by itself is a regulated return system although it doesn't deal with the deadhead system of the International motor. The correct FASS will more than feed what this Ford motor can use even with fairly large (200+) injectors. IMHO either do a lift pump to support the factory pump with something like the ITP regulated return system OR do a FASS with the rear crossover line. Trying to balance the FASS with a regulated return system is an extreme pain although it can be done with a little patience. The major benefits of the FASS are removing air from the fuel supply and a better volume of fuel to the injectors. The benefit of the RR system is a constant flow through supply of fuel through the heads. The trick is to have enough fuel return from the FASS to the tank and still have flow through the RR system.
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From: Colorado Springs
Not sure I'm getting your take on this. I've got the regulated return to correct the deadhead condition of the factory system (and ensure pressure to all injectors), and larger lines to increase volume. My Airdog functions as a lift pump - reducing the load on the factory pump, and fuel conditioner (filter and water/air seperation). I'll presume you were referring to the FASS as a replacement for the factory lift pump. If so, you'd still have the existing factory pressure relief valve/lines limiting flow to the heads.
Mark
Mark
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Joined: Dec 2003
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From: Stuttgart, Ar
Mark--you have a point about the fuel lines to the heads. I'm not sure that they'd be enough to supply extremely large injectors, however, according to FASS the 3/8 fuel line is more than sufficient as a fuel supply for the motor for whatever you run injector wise. I can see that after studying the FASS fuel flow drawing that what I was told is incorrect. The fuel supply to the motor will be maxed to whatever the regulator spring in the FASS is. It will return aerated fuel to the tank regardless of what the engine regulator is set at. The engine regulator has to be set lower than the max pressure of the FASS so that you'll have return flow through the back of the heads, but high enough to maintain desired fuel pressure at the injectors. I am referring to the FASS as a replacement pump to the stock pump in this scenario.
Last edited by npccpartsman; Jan 9, 2008 at 04:21 PM.
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From: Colorado Springs
Thanks. I think the Airdog is similar, but I'm not depending upon it for pressure to the injectors, so I'll presume not quite as critical as when replacing the stock pump. In my situation, it just supports the stock pump with a good supply, and I can now at least double the life of my OEM filters; changing the cheaper Airdog filter every 15k.
Mark
Mark
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Hotshot
Joined: Dec 2003
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From: Stuttgart, Ar
Actually the Airdog and FASS have very unique stories behind each as they are both manufactured by father and son and compete against each other. There is a FASS application as a lift pump also. Since the price for the lift pump was basically the same as a replacement pump I thought why have two and then have two to replace when one goes bad. On the other hand, feeding the stock pump with a lift pump will also provide an adequate supply of fuel for large injectors and still be able to use the stock pickup in the tank and not have a lot of replumbing to do since the pickup supplied with the FASS sucks. How did you make the decision to go with the Airdog?
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Senior User
Joined: Aug 2003
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From: Colorado Springs
I checked into the father and son situation as well. I decided to go with the Airdog due to feedback on the bracket assembly that it comes with (very nice and stout), a little bit smaller in size, and the wiring. If I remember right the FASS needed to be spliced to the OE wiring for power (not sure here), and the Airdog is wired direct to the battery, but is activated via a relay that you can wire to your choosing. I think either one is a great setup, this one just seemed to make sense when I reviewed the install instructions for both.
The one drawback to the Airdog is that they try to get you to use their branded Stratopore filters. Price isn't bad, but I like options like the FASS has. I did find suitable Fleetguard replacements, but not much of a price difference.
Mark
The one drawback to the Airdog is that they try to get you to use their branded Stratopore filters. Price isn't bad, but I like options like the FASS has. I did find suitable Fleetguard replacements, but not much of a price difference.
Mark
Post Fiend
Joined: Oct 2005
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From: Plano TX and Brentwood TN
Originally Posted by npccpartsman
Trying to balance the FASS with a regulated return system is an extreme pain although it can be done with a little patience.
Senior User
Joined: May 2006
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This is what I run. System has been working PERFECT for a couple months now. The Fuel Pressure doesn't even blink no matter what tune I throw at it.
The worst part about NOT using the stock fuel pump is that the FASS will lose prime WAYYY sooner than t he stock pump. The stock fuel pump has the factory return integrated into the factory pickup, which keeps the pump primed virtually until the tank is damn near empty. The FASS pickup will lose prime under hard braking at 1/4 tank.
~Brad
https://www.ford-trucks.com/forums/6...ht=fass+150180
The worst part about NOT using the stock fuel pump is that the FASS will lose prime WAYYY sooner than t he stock pump. The stock fuel pump has the factory return integrated into the factory pickup, which keeps the pump primed virtually until the tank is damn near empty. The FASS pickup will lose prime under hard braking at 1/4 tank.
~Brad
https://www.ford-trucks.com/forums/6...ht=fass+150180
Post Fiend
Joined: Oct 2005
Posts: 10,626
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From: Plano TX and Brentwood TN
Originally Posted by badbrad60
The FASS pickup will lose prime under hard braking at 1/4 tank.
~Brad
https://www.ford-trucks.com/forums/6...ht=fass+150180
~Brad
https://www.ford-trucks.com/forums/6...ht=fass+150180
Hotshot
Joined: Dec 2003
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From: Stuttgart, Ar
Originally Posted by tex25025
What suggestions would you have for someone that is installing a FASS system to work with the ITP? I'm picking up my FASS tomorrow from Bean's and was going to try to install it saturday everything willing, but I already have the RR kit on there and was wanting to run both.
Post Fiend
Joined: Oct 2005
Posts: 10,626
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From: Plano TX and Brentwood TN
I went with the big one that they had, that way it allowed me to upgrade if I felt that need to deliver more fuel later on. Also where should I put the in cab fuel psi gauge? Keep it on the ITP kit?
Last edited by tex25025; Jan 10, 2008 at 07:03 AM.
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Postmaster
Joined: Apr 2006
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From: Neptune Beach, FL
The Gauge on the ITP kit is for regulating.. I don't think you can remove it.. IIRC..
If you want in cab pressure, getcha a Electronic Fuel Pressure gauge
What I'm doing..
If you want in cab pressure, getcha a Electronic Fuel Pressure gauge
What I'm doing..