fuel system question
Thread Starter
Drifting
Joined: Sep 2011
Posts: 1,606
Likes: 30
From: frederick md
fuel system question
I have a late 2003 c5z with the c6 fuel system. I have holley fuel rails, magnafuel regulator, 4301 pump with the 2 filters. My intentions are I just want to turn off the stock pump that feeds the fuel to the rails and tap the side of the fuel tank to run a -12 line to the pump for a feed. I was under the car yesterday and noticed one line goes to the driver tank and another goes to the passenger. Is the one that goes to the passenger side a breather?
Melting Slicks
Joined: Mar 2008
Posts: 2,412
Likes: 4
From: Houston/Dayton Texas
if your talking about the line on the fuel hat, no its a "jet pump" or siphon pump.. it brings gas from one side to another. You need the stock pump to circulate the fuel back and forth.. there is no electric pump in the passager tank.
Why not run a hobbs switch to control the on/off of your secondary pumps to turn on only under boost?
found a pic of the my pump.. is just works of suction..
Why not run a hobbs switch to control the on/off of your secondary pumps to turn on only under boost?
found a pic of the my pump.. is just works of suction..
Last edited by joshtownsend; Nov 4, 2013 at 10:14 AM.
Advanced
Joined: Oct 2011
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From: Lusby MD
Thread Starter
Drifting
Joined: Sep 2011
Posts: 1,606
Likes: 30
From: frederick md
So how do I get the stock setup working where fuel is still transfered from both tanks and my fuel level guage still works. The tap the side of the tank to run my stand alone system.
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
I'm concerned you're about to get yourself in a situation here. The reason I say that is because I've fought the fight trying to keep a customers external pump alive after the guy that sold it to him yanked all his stock stuff out. It got really ugly. The external pumps will overheat and cavitate after a while and when that happens, the pump will eat itself. The solution for that was to run a PWM controller on the pump. In the end, it turned out to be a hell of a lot of time, money and headaches for zero gain.
ECS has the recipe for blocking off the stock regulator so that you can use the internal pump in tandem with your external on a WOT or boost trigger and have it externally regulated. That is the absolute best recipe for success in this case.
ECS has the recipe for blocking off the stock regulator so that you can use the internal pump in tandem with your external on a WOT or boost trigger and have it externally regulated. That is the absolute best recipe for success in this case.
Melting Slicks
Joined: Nov 2003
Posts: 2,213
Likes: 135
From: In front!
Why try and hassle with that? Just get a "y" fitting and combine your stock pump with the aftermarket one! Like blownblue said, you are going to run into problems and spend more money trying to figure out some way of getting rid of the stock pump.
Why are you against Hobbs switches?
Why are you against Hobbs switches?
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Melting Slicks
Joined: Mar 2008
Posts: 2,412
Likes: 4
From: Houston/Dayton Texas
Melting Slicks
Joined: Nov 2003
Posts: 2,213
Likes: 135
From: In front!
Well, you are going to need to have it on because of the passenger side siphon. The only thing that I would suggest is to get to the pump and disconnect the line.
Last edited by Y2KRoadster; Nov 7, 2013 at 09:50 PM.