Cackle Cure Kit???

[Tail_Gunner]

From looking at the schematic showing the routing of the plumbing, it looks to me like that mod will bleed off all your fuel pressure. It has you routing fuel from the "dead end" fuel fittings to the fuel return line down stream of the FPR. So the end result is the fuel is by-passing the FPR. Without fuel going through the FPR, you'll have zero fuel pressure.

I think I like having fuel pressure. I'll pass on this one and save my pocket change for a regulated return kit from ITP.

 

[Fire1]

From my understanding it uses a very small bleed orifice to allow some fuel to move through without dropping pressure. I think it is a viable alternative for those relatively stock trucks that do not want/need the adjustment of the Regulated Return set up.

 

[BIG JOE]

Its the first time I have heard anyone saying it would cure the cackle. Most have found if ya get rid of the air being sucked into the fuel lines by doing the "Hutch" mod, cackle goes away. It did for me.
Jim

The Hutch mods worked for me too Jim. Getting the Air out. (and the Fuel pump inlet QD fitting delete)

The HPX (cross over oil line) was one other mod that had Good "Less Cackle" results, IMO.

I say Good Results because.. When I did the HPX mod and fired it up ? My wife happened to be standing there.. after a moment or two, she said: Sounds like it got Quieter.. and it doesnt "Jiggle" anymore.. turned and walked away.

ALL the proof >I< needed. , I closed the Hood.

Like TG, I like Fuel Pressure.. and Not sure about the Gain for the Buck.. on that one.

Joe

 

[Tail_Gunner]

From my understanding it uses a very small bleed orifice

You're right, there is a "T" fitting with an orifice to maintain fuel pressure to a point. But all that will do is restrict flow, it will not maintain pressure at a set value. With my "shimmed" FPR, it maintains fuel pressure at 65 psi no matter how far down my right foot is. With the oriface, pressure will drop-off as fuel demand increases.

I'll continue to save my pocket change for that regulated return kit from ITP.

 

[RobertinTX]

From what all I've read the main problem is the connections from the tank to the pump allowing air in.
If thats the case why not just fix that problem ?? rather than drop the tank...
Just thinking out loud...but would appreciate a response from those in the know..

 

[BIG JOE]

From what all I've read the main problem is the connections from the tank to the pump allowing air in.
If thats the case why not just fix that problem ?? rather than drop the tank...
Just thinking out loud...but would appreciate a response from those in the know..

Yer right. The QD type fittings on the suction side of the fuel pump are known to let air to be pulled in, as the pump pulls fuel from the tank.

The Fix is to replace those fittings with Diesel Friendly fuel line and band clamps.

The Fuel Pick Up assembly, in the tank, has air intrusion issues also. By design, at below a half a tank (or so) of fuel it can allow air to be mixed in with fuel.. and.. the end of the return line is in close proximity to the fuel pick up foot.

Sooo, With leaking fittings, Air is (can be) in the fuel.. In a Vicious Circle.. Createing "Cackle". (and reduceing performance)

Some.. just change out the external fittings and don't let the fuel tank level, get below.. a half'a tank.

Hope this helps

 

[Toptech]

Does anyone know of a parts store or anywhere else I can find a frame mounted fuel filter that is rated for "suction"? Parts stores around here don't have any that specificly say they are for suction. Could I use a simple inline filter that has 3/8" nipples?

 

[BIG JOE]

Does anyone know of a parts store or anywhere else I can find a frame mounted fuel filter that is rated for "suction"? Parts stores around here don't have any that specificly say they are for suction. Could I use a simple inline filter that has 3/8" nipples?

You try some of the Site sponsors yet ? That's where I got a Dahl pre-pump filter. Came as a Kit. All pieces'n Parts. Excellent Quality. DIY . Competitive prices too..



JMO but yul be under there change'n those little In-line filters.. Quite often. Went There, Did That. Your Call Though

 

[Tail_Gunner]

Does anyone know of a parts store or anywhere else I can find a frame mounted fuel filter that is rated for "suction"? Parts stores around here don't have any that specificly say they are for suction. Could I use a simple inline filter that has 3/8" nipples?

This is what I've been using as a pre-pump filter for several years now:
PRE-PUMP FILTER. Not only is it a filter but water separator too. The filter & base is available about at any decent parts place.

 

[Toptech]

Tail gunner, where did you get your, how much $, and how many gal/hr flow is it rated at? Does anyone know how many gal/hr is required for these engines?