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  #1  
Old 01-23-2013, 03:30 AM
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regulated return question...

I want to un-dead my heads for the fuel system but wonder why we need an aftermarket regulater aside from more fine tuning of the pressure. If all we are worried about is getting fuel to the back of the heads why can't we feed both ends instead of having fuel ciculate and adjust at the end. Unless there's something I'm missing in the design inside the head can't I "Y" into the fuel line that feeds drivers side head and feed the back at the same time and do the same "Y" on the passenger side. Youd be delivering fuel to both ends of the head and you could retain the stock regulator set up. This isnt to say a better setup then a normal rr system but... it would be a lot cheaper cause all you need is hose and fittings and you would in essense be doing the same thing in a differnt way. Can this be done or am I wrong?
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Old 01-23-2013, 05:32 AM
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regulated return question...

I have no input... I am just curious as to what others will say on the subject. I know people have built there own systems.


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  #3  
Old 01-23-2013, 05:35 AM
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It's been done before....#25 on the 100 ways to skin that cat.
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Old 01-23-2013, 05:38 AM
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That way is still regulated before the heads.. With a regulator after the heads you will have constant pressure throughout the heads.
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Old 01-23-2013, 05:44 AM
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A regulator after the heads lets off ONLY when pressure is over the set point. You assume that the pressure is constant BELOW the set point. Same with the regulator before the heads....

Feeding both the front and rear ports at the same time ensure the pressure is constant.
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  #6  
Old 01-23-2013, 06:26 AM
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A regulator reads the pressure at the regulator...... it does not take into account the pressure drop getting to the rails and the pressure drop happening in the rails from the injectors taking in fuel.

In other words you are regulating up to the point of the regulator. After that point you have no control over it.
With stock injectors it might only be a small difference but you are still wrong in your statement...

Besides if you ever get air in there from installing it or repairs you have now trapped that air with no way out besides going through the injectors. Why would you want that??
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  #7  
Old 01-23-2013, 06:50 AM
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Quote:
Originally Posted by 07stroker View Post
A regulator reads the pressure at the regulator...... it does not take into account the pressure drop getting to the rails and the pressure drop happening in the rails from the injectors taking in fuel.

In other words you are regulating up to the point of the regulator. After that point you have no control over it.
With stock injectors it might only be a small difference but you are still wrong in your statement...

Besides if you ever get air in there from installing it or repairs you have now trapped that air with no way out besides going through the injectors. Why would you want that??
So why do you think this only applies with a PSI reading before the front of the heads?? Doesn't the same thing happen regardless of where in the system you read the pressure??

With the fuel filter at the highest point in the system the natural path of air is to the highest point. Air should not be forced thru the system due to flow...does it happen ..Yes but not like you are thinking.
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Old 01-23-2013, 08:49 AM
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This is great stuff I'm glad to know that my idea will work as a "cheap" way to fuel the entire head. And I would think starting this way would allow for a better system later once I get a regulator cause I would bypass the stock set up all together and use a spin on filter rather than a cartridge style and If im already plumbed up I can just run a line to the new filter housing then to the heads and have my regulator somewhere in there... I just think feeding both sides would truely take care of any starvation rather than pushing fuel through from one end to the other cause your first cylinders could eat most the fuel regaurdless of where a regulator is. Stainless steel hoses here I come... so next question is bigger better for the fuel lines what's the biggest line I should use
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  #9  
Old 01-23-2013, 08:53 AM
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I hate to tell you but you are focused on the wrong end. Start at the tank, resolve all issues working towards the motor..not the other way around.

BTW I say this as I have 238K on my original injectors using a fuel sump, AD100 feeding the HFCM, blue spring and 6.4 banjos.
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  #10  
Old 01-23-2013, 09:13 AM
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Quote:
Originally Posted by HeavyAssault View Post
I hate to tell you but you are focused on the wrong end. Start at the tank, resolve all issues working towards the motor..not the other way around.

BTW I say this as I have 238K on my original injectors using a fuel sump, AD100 feeding the HFCM, blue spring and 6.4 banjos.
couldn't you just have the AD100 and skip the HFCM.. its something i'm thinking of doing.. and the kids i see have a total bypass of the OEM fuel regulator.. does this eliminate the need for the Bluespring mod?

Driven Diesel 6.0L Regulated Return Kit
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