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Fass 150

A

Acesneights1

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Was reading that on our year trucks the Fass can cause hart starting if the VP44 is high mileage or been damaged. Is putting this on asking for a problem ? I don't plan on chips or tuners so should I just put a fuel press gauge on and a better lift pump ?
 
Acesneights1 said:
Was reading that on our year trucks the Fass can cause hart starting if the VP44 is high mileage or been damaged. Is putting this on asking for a problem ? I don't plan on chips or tuners so should I just put a fuel press gauge on and a better lift pump ?
Click to expand...

I don't think in that case that it would be the FASS causing the hard start condition.

If the VP is high mileage or damaged, the problem is more likely the diaphram which tears and is usually the cause of the VP's failure in higher mileage vehicles.

The biggest killer of VP's is lack of, or excess, fuel PRESSURE. Lack of causes lack of lubrication and excess damages the pump diaphram.

Keeping the pressure between 7 - 20 psi is where you need to be. Ideally, you want is between 10 - 17 psi.

My FASS has been very consistent in that area. Even running my current setup, pushing dual CP3's, big sticks and dual feed lines, I have never seen it drop below 13 psi.

The absolutley most critical thing yo ucan do for a VP powered truck is make sure it has good fuel pressure. Replacing the pump with a FASS, AirDog, or a Walbro (with a pressure regulator) is a smart move.
 
Very nice. Question. My 2002 "appears" to have the LP still on the block. Do I need to drop the tank to change the pickup tube ?
 
Acesneights1 said:
Very nice. Question. My 2002 "appears" to have the LP still on the block. Do I need to drop the tank to change the pickup tube ?
Click to expand...

Yes, you still need to drop the tank so you can drill the hole for the tube.

You could take the bed off, if you have a lift available, but one way or another, you need access to the top of the tank.

Also, the pump on the block is the one that is prone to fail, due to the vibration from the engine.

There is a cheaper option if you don't want the full FASS or AirDog system.

FASS has the DDRP system, which is the pump without the filtration setup.

AirDog has the Raptor pump, which is the same thing.

Both utilize the factory filter housing and a lot cheaper that the full FASS or AirDog.
 
I was reading up on both. The 100 series on both appears to use the stock pickup tube and are more than adeqaute for what I will do to with truck. Would I still need to pull the tank to use them ? The directions say no from what I saw.
 
As long as you can get to the supply and return lines, you can probably get away with it.

BUT, after doing 3 AirDog's and 2 FASS pumps, I will say that getting to those line without dropping the tank (at least a little) is near impossible. There just isn't enough room.

Dropping the tank is easy. Well, technically easy, but can physically be a PITA.

It's just two 15mm nuts that secure the tank straps and it'll lower down a bit. You MAY be able to get at the lines by dropping it down to the last few threads, but I've always dropped the tank. They really can be a PITA with it like that. Trying to squeeze between the tank and the driveshaft is better left to a 12 year old, 80 lb Russian contortionist.
 
Hey since i plan on leaving the truck stock is the airdog worth it or should I just put a raptor on it ? I don't need extra performance, just looking to protect the IP. It sounds lIke I will never use anywhere near what the Airdog/fass is capable of.
 
You can get away with just the pump with no problem.

The stock filter is more than adequate and with a good Stratapore 2 or 3 micron filter, you'll have better filtration and water sepraration. The Stratapore removes 95% of both free and emulsified water, whereas the seperator in the FASS and AirDog only do 50% free and 50$ (max) emulsified.
 
Where would be the best place/way to tap for permanent fuel pressure gauge since I will be removing the Banjo Bolt with this install. Just tee in at the IP ?
 
Acesneights1 said:
Where would be the best place/way to tap for permanent fuel pressure gauge since I will be removing the Banjo Bolt with this install. Just tee in at the IP ?
Click to expand...

This is the piece you want right here. It would replace the one that comes with either the AirDog or FASS and it goes right at the VP, which is right where you want it.

FTG-POET8-tn100.jpg


Pushlock Fitting

1/2" Hose to #8JIC Swivel with 1/8"NPT Pressure Port. Recommended for Dodge Cummins with aftermarket fuel systems (AirDog & FASS)Part #: FTG-POET8 Price $7.99

http://www.dieselmanor.com/dm_products/fittings.asp
 
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