airdog or fass? - Ford Powerstroke Diesel Forum
6.7 Performance Parts Discussion 6.7 Performance Parts Discussion

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Old 05-06-2014, 06:28 PM
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airdog or fass?

after tuning my truck i have had a few times that i feel like it needs a little more fuel. i was considering an airdog both for more fuel and for the other benefits it offers. has anyone done this to a 6.7 yet that is on here?
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Old 05-06-2014, 08:17 PM
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Just a FYI. I've had an airdog 165 from my 6.4 that I wanted to install on my 6.7 and the only reason I have not is that I heard you lose the auto start feature. GL!
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Old 05-07-2014, 12:22 AM
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What makes you feel like your running out of delivery fuel?

Wont run into issues with a lack of fuel until you start putting down some serious numbers, alot more then a tuner can produce. Usually a good time to add the duel fueler kit along with new lift pump. I have always like fass but I think they are both pretty much equal in the quality department.
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Old 05-07-2014, 02:14 AM
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there have been times...and passengers have noticed it too...that the truck chokes itself a little under heavy throttle. I just assumed it was lack of fuel.
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Old 05-07-2014, 09:00 AM
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FASS is the way to go. Feeds 125 gallons per hour or somewhere around there and no truck is gonna use that much. It's affordable and easy to install.
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Old 05-07-2014, 12:20 PM
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Quote:
Originally Posted by blakerugg View Post
there have been times...and passengers have noticed it too...that the truck chokes itself a little under heavy throttle. I just assumed it was lack of fuel.
Get a cts and monitor. I know exactly what your talking about and nine time outta ten its the tires breaking lose momentarily and the truck defuels if traction control is on. I also get the odd tranny issue when the trucks cold that could be mistaken as fueling issues but thats just weird shift patterns. Theres no way your trucks being starved fuel with tuning only unless you got some seriously broke parts.
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Old 05-07-2014, 12:47 PM
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My 2013 will run the fuel rail dry on just a tune. Have 5" exhaust, S&B CAI, Mini with SPE Hotx tunes. Getting on it pulling a hill or at WOT it will run out of fuel. I've heard this is more of an issue with the 2013 trucks than the 11 or 12s'. hope this helps.
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Old 05-07-2014, 06:34 PM
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Now this problem brings us to the question is it the rail running dry with a) lack of hp pump output or b) delivery pump pressure. Id lean more to it being the hp pump because chances are if it was losing delivery supply then your gonna blow up that hp pump pretty fast. They dont like being starved. If this is the case then a fass isnt going to help, your gonna need a second hp pump.

Curious how your monitoring to know the rail is running dry? Id like to watch my rail pressure but I believe only thing on my cts is gpm and I think that's calculated in the ecm using a few sensors.
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Old 05-08-2014, 01:29 AM
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Not 100% positive about the rail running dry. The reason I suspect this is that I get a reduced engine indication from the truck. I spoke with the people at SPE and TS performance about this problem. They both "suspected" that it was fuel rail running dry. Friend of mine who is a Ford diesel mech also gave me the same answer. I do not have proof but have good reasons to believe that this is what's happening. Thought about running Mp-8 stacked with my Mini.............TS suggested FASS/Airdog....etc to help prevent this problem. As I said before, I am to understand that this is not such a problem on the '11 or '12 model years.
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Old 05-08-2014, 06:43 AM
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Hmm, I just dont see how it can only be a problem on the 13s since nothing changed on the engine for that model year. H&S sells a pretty nice duel fuel kit and I think they say fueling issues won't begin til around 700rwhp. There's no way to hit anywhere near that with a tune/delete. If I were you I would start monitoring rail pressure somehow and see what happens before you start coming on here scaring the guys with 13s. I can see tranny issues definitely being miss diagnosed as fueling problems.
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