Regulated Return discussion
Lead Driver
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
It's ALWAYS easier to push a fluid than to pull it. I would go so far as to think that partially gelled fuel will be much more easily pushed than pulled. Even to the point of if it's jelled, it still has to resist 65psi to not get pumped. There's no getting around that law of nature. That's why I will always advocate a tank mounted fuel pump.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
It hadn't occurred to me until reading this but this may be what kept me running and cattle alive 2 winters ago when we had the big freeze. Here in Oklahoma we had 3 or so days of -20ish, 7-8 days of negative temps and like 10 or 12 below freezing. Below freezing isn't anything new here but those below 0 days are not all that common any more and I've never seen -20 before then. Anyway my point is I installed my pump in tank not quite a year prior to this, and my girl never missed a lick during all of it. I passed a lot of abandoned diesels during that 1.5-2 weeks, but never a hiccup. I spent over a week of it doing nothing but tripping wherever I could find hay, plus 2 -3 trips a day from the house to our land w/ a tote full of water because the ponds got to thick break ice even w/ the loader.
Cargo Master
Joined: Mar 2019
Posts: 2,907
Likes: 788
From: Kinnula,Finland
But then how have i survived in -35celsius with all stock system,no tank mods and broken pickup foot...?
PROPER winter fuel and CHANGE fuel filter BEFORE freezing temps..
I still haven't decided my upcoming fuel system,keep the stock bowl or not to keep...Having a van will benewit for sure,from stock bowl delete..
PROPER winter fuel and CHANGE fuel filter BEFORE freezing temps..
I still haven't decided my upcoming fuel system,keep the stock bowl or not to keep...Having a van will benewit for sure,from stock bowl delete..
FTE Chapter Leader
Joined: Jan 2005
Posts: 13,111
Likes: 4,716
From: Henderson, NV
But then how have i survived in -35celsius with all stock system,no tank mods and broken pickup foot...?
PROPER winter fuel and CHANGE fuel filter BEFORE freezing temps..
I still haven't decided my upcoming fuel system,keep the stock bowl or not to keep...Having a van will benewit for sure,from stock bowl delete..
PROPER winter fuel and CHANGE fuel filter BEFORE freezing temps..
I still haven't decided my upcoming fuel system,keep the stock bowl or not to keep...Having a van will benewit for sure,from stock bowl delete..
Lead Driver
Joined: Jun 2013
Posts: 5,647
Likes: 891
From: north of Minneapolis, MN
I haven't had a diesel gel since maybe 1989...1983 F250 with the 6.9.
I like to believe the fuel terminals account for the weather in their area. I think Leonard would agree, here in the Mpls area, we get -20 pretty regular and some -30. You just don't see many semi's stalled out.
I like to believe the fuel terminals account for the weather in their area. I think Leonard would agree, here in the Mpls area, we get -20 pretty regular and some -30. You just don't see many semi's stalled out.
Cargo Master
Joined: Mar 2019
Posts: 2,907
Likes: 788
From: Kinnula,Finland
Exactly,my point was that with proper mainteinance and correct fuel for the weather,you'd will be fine.
Its Comin Right for us!
Joined: Feb 2005
Posts: 12,161
Likes: 2,640
From: GA
Kind of wrong forum but id love to hear this group’s thoughts on implementing stock 99-03 fuel system to 94-97 vs typical aftermarket e-fuel.
im leaning that direction for simplicity sake and use of same filters and seals etc on both my trucks.
im leaning that direction for simplicity sake and use of same filters and seals etc on both my trucks.
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CNCFAB
Joined: Apr 2020
Posts: 4,874
Likes: 2,006
it is just a 3 way-1 in feeding to 2 out to the front head ports. I have it fed by a line off the airdog system. Works well. I also really like my cncfab 4 line feed. Having a hard time deciding which one to put on my engine that is going into the truck soon.
5th Wheeling
Joined: Nov 2021
Posts: 46
Likes: 11
Thanks Eswft. I like that piece. I wonder what the internal milling looks like?
Guys,
What do you think of the 4-way feed blocks with no return? Essentially, 1 incoming supply line into a manifold block with 4 hoses output to front and back of each cylinder head?
I wonder what kind of hyrdaulics ares happening inside the head when fuel is pushing from the front and back of each head and meeting somewhere in the fuel rail? Instinctually I feel like there would be some weird fluid dynamics going on with fuel rushing headlong into itself in a tube (cylinder head) while being drawn out at different points along the fuel rail according to firing order.
I think I like the idea of just having fuel entering the head from one direction better.....like the stock scenario.....or at least in from one side and out from the other.
Guys,
What do you think of the 4-way feed blocks with no return? Essentially, 1 incoming supply line into a manifold block with 4 hoses output to front and back of each cylinder head?
I wonder what kind of hyrdaulics ares happening inside the head when fuel is pushing from the front and back of each head and meeting somewhere in the fuel rail? Instinctually I feel like there would be some weird fluid dynamics going on with fuel rushing headlong into itself in a tube (cylinder head) while being drawn out at different points along the fuel rail according to firing order.
I think I like the idea of just having fuel entering the head from one direction better.....like the stock scenario.....or at least in from one side and out from the other.
Super Moderator
Joined: Dec 2011
Posts: 13,306
Likes: 6,080
I wonder what kind of hyrdaulics ares happening inside the head when fuel is pushing from the front and back of each head and meeting somewhere in the fuel rail? Instinctually I feel like there would be some weird fluid dynamics going on with fuel rushing headlong into itself in a tube (cylinder head) while being drawn out at different points along the fuel rail according to firing order..
That's when the fluid dynamics in the fuel rail get interesting.
5th Wheeling
Joined: Nov 2021
Posts: 46
Likes: 11
Y2kw57,
Sorry but I'm not tracking. Can you elaborate on your post?
My understanding of the fuel system is once fuel enters the fuel rail in the heads, it is then routed to a chamber at each of the injectors, (which is isolated by the upper and lower o-rings of the injector) at which point the fuel is pushed into the injector at the fuel inlet, then the intensifier piston compresses the fuel to 7x the inlet pressure (ultimately resulting in 7x ICP pressure) pushing it into the barrel and then the injector nozzle.
There are check valves/***** in the injector preventing fuel from being pushed back out the inlet side of the injector.
Guys,
I hate that I even had to consider posting this P.S.: My posts are only being put up as a tool for me and maybe others learning more about this system. Any challenge or questioning of any of your posts is only put up in the interest of education, and I'm fully aware that my understanding of the topic at hand could be anywhere from partially correct, mostly correct, fully correct, to flat out wrong.
Sorry but I'm not tracking. Can you elaborate on your post?
My understanding of the fuel system is once fuel enters the fuel rail in the heads, it is then routed to a chamber at each of the injectors, (which is isolated by the upper and lower o-rings of the injector) at which point the fuel is pushed into the injector at the fuel inlet, then the intensifier piston compresses the fuel to 7x the inlet pressure (ultimately resulting in 7x ICP pressure) pushing it into the barrel and then the injector nozzle.
There are check valves/***** in the injector preventing fuel from being pushed back out the inlet side of the injector.
Guys,
I hate that I even had to consider posting this P.S.: My posts are only being put up as a tool for me and maybe others learning more about this system. Any challenge or questioning of any of your posts is only put up in the interest of education, and I'm fully aware that my understanding of the topic at hand could be anywhere from partially correct, mostly correct, fully correct, to flat out wrong.
5th Wheeling
Joined: Nov 2021
Posts: 46
Likes: 11
Everyone,
This is a pretty thorough explanation of the factory fuel system. Don't get distracted by this guys headband, he knows his Factory Ford Engineering. Explains some things about the Ford Factory pick up assembly that I think are pretty interesting. Do you wanna know why there is the duck bill on the outlet side of the fuel return? Did you know that the small in tank filter assembly at the pickup/return is actually called the "Thermal Recirculation Module" and that it serves some very specific functions? I wish that the Ford Factory Service Manuals explained what the Ford Engineers were thinking when they designed our trucks!
This is a pretty thorough explanation of the factory fuel system. Don't get distracted by this guys headband, he knows his Factory Ford Engineering. Explains some things about the Ford Factory pick up assembly that I think are pretty interesting. Do you wanna know why there is the duck bill on the outlet side of the fuel return? Did you know that the small in tank filter assembly at the pickup/return is actually called the "Thermal Recirculation Module" and that it serves some very specific functions? I wish that the Ford Factory Service Manuals explained what the Ford Engineers were thinking when they designed our trucks!
Super Moderator
Joined: Dec 2011
Posts: 13,306
Likes: 6,080
Y2kw57,
Sorry but I'm not tracking. Can you elaborate on your post?
My understanding of the fuel system is once fuel enters the fuel rail in the heads, it is then routed to a chamber at each of the injectors, (which is isolated by the upper and lower o-rings of the injector) at which point the fuel is pushed into the injector at the fuel inlet, then the intensifier piston compresses the fuel to 7x the inlet pressure (ultimately resulting in 7x ICP pressure) pushing it into the barrel and then the injector nozzle.
There are check valves/***** in the injector preventing fuel from being pushed back out the inlet side of the injector.
Sorry but I'm not tracking. Can you elaborate on your post?
My understanding of the fuel system is once fuel enters the fuel rail in the heads, it is then routed to a chamber at each of the injectors, (which is isolated by the upper and lower o-rings of the injector) at which point the fuel is pushed into the injector at the fuel inlet, then the intensifier piston compresses the fuel to 7x the inlet pressure (ultimately resulting in 7x ICP pressure) pushing it into the barrel and then the injector nozzle.
There are check valves/***** in the injector preventing fuel from being pushed back out the inlet side of the injector.
The transient point where the inlet check ball is bypassed with the spillage of high pressure fuel back into the fuel rail via alignment of the annular groove in a split shot is visualized at 24:25 in the video you posted.
