Fuel System
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Senior User
Joined: Jun 2006
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From: La Porte, TX
Fuel System
Can some one please explain the fuel system to me? The part that I dont understand is the fuel return. Why is the fuel returned to the tank? Is it because all the left over pressure at the injectors needs some were to go? Hate to sound stupid.
Lead Driver
Joined: Oct 2004
Posts: 7,413
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From: Columbia, MO
No such thing as a stupid question around here. 
You're about right for the fuel being returned to the tank though. The fuel pump is running 100% at all times when the truck is running. So it has to be able to supply enough fuel to feed the injectors while at full throttle. However, when the injectors are not needing all that fuel, the left over fuel has to go somewhere or the pressure in the supply line would rise too high, so the excess fuel is simply returned to the tank.
You're about right for the fuel being returned to the tank though. The fuel pump is running 100% at all times when the truck is running. So it has to be able to supply enough fuel to feed the injectors while at full throttle. However, when the injectors are not needing all that fuel, the left over fuel has to go somewhere or the pressure in the supply line would rise too high, so the excess fuel is simply returned to the tank.
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Senior User
Joined: Jun 2006
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From: La Porte, TX
By doing a intank mod like removing the mixing chamber is a filter needed inbetween the tank and the pump? If so is two filters too much for the system? Seems like the extra filter would slow down the fuel flow.
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Senior User
Joined: Jun 2006
Posts: 141
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From: La Porte, TX
So this pre pump kit I would get with no filter right or is this a good filter? Lot of people say this will help out my fuel system alot.
http://www.itpdiesel.com/store.php?c...on=show_detail
http://www.itpdiesel.com/store.php?c...on=show_detail
Post Fiend
Joined: Jun 2006
Posts: 9,714
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From: White Mnt's,New Hampshire
[QUOTE=cdiddy]So this pre pump kit I would get with no filter right or is this a good filter? Lot of people say this will help out my fuel system alot.
get the kit with the filer..it wont restrict the fuel flow..it will catch any grub and water from the tank before it gets to the fuel pump..
get the kit with the filer..it wont restrict the fuel flow..it will catch any grub and water from the tank before it gets to the fuel pump..
Lead Driver
Joined: Oct 2004
Posts: 7,413
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From: Columbia, MO
ITP's kit is a good filter. All of Dennis's (owner of ITP) stuff is top notch quality. He wouldn't sell it if it wasn't.
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Hotshot
Joined: Nov 2006
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From: North of Greenville
I went with the filter and also added a Carter 72gph lift (booster) pump ahead of the stock pump to make sure that I never saw any problems from pressure drop across my new Baldwin filter that came with the pre-pump intank kit. My install is in my gallery.
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Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
I run a $3 Fram see through right in front of my pump. Almost looks like a lawnmower filter except much bigger. I have eliminated my in-tank crap and run a sump. No helper pump. No problems thusfar and decent dyno #s.
What will you gain with all of the helper pump and Dahl filter stuff? Don't know. At least there will be adequate fuel to the stock pump which is IMO the limiting factor anyhow. Kwikk decided to skip all that and put his stock type pump, or primary pump right in the tank. Again, same pump limitations without having to lift fuel out of the tank. My pump is gravity fed.
Think all of this over for your bang for the buck decision. I could revert back to a stock type pickup with little difficulty but have no desire to do so. Also, consider that I used a sink strainer as a sump because I didn't feel like paying over $200 for a billet unit that they no longer sell due to safety reasons. So now I am a safety hazard.
What will you gain with all of the helper pump and Dahl filter stuff? Don't know. At least there will be adequate fuel to the stock pump which is IMO the limiting factor anyhow. Kwikk decided to skip all that and put his stock type pump, or primary pump right in the tank. Again, same pump limitations without having to lift fuel out of the tank. My pump is gravity fed.
Think all of this over for your bang for the buck decision. I could revert back to a stock type pickup with little difficulty but have no desire to do so. Also, consider that I used a sink strainer as a sump because I didn't feel like paying over $200 for a billet unit that they no longer sell due to safety reasons. So now I am a safety hazard.
Last edited by Tenn01PSD350; Aug 27, 2007 at 12:21 AM.
Post Fiend
Joined: Sep 2006
Posts: 7,426
Likes: 6
From: Sioux Falls, SD
Originally Posted by cdiddy
So what kind of change will I see with the pre pump in tank mod and the carter pump compared to the stock set up? Are these mods worth the money.
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