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Hi all. First post here.
Curious on a technical issue regarding fuel line routings.
I currently have a -6 feed coming into the FPR. From there is a feed to pass side fuel rail. Then back side of fuel rails is the cross over to driver side fuel rail. Then from the front of the driver side fuel rail is the line acting as the return back to the tank/pump. I have included a picture with arrows to show.
My question is if this routing is correct. And if not, would it be smarter to go to a routing that mirrors the picture supplied by Aeromotive.
If I am following your arrows correctly, your system is not correct. It looks like your coming from the tank/pump to the bottom of the regulator? If so, that's wrong. The bottom of the regulator is the return to the tank. The other graphic is certainly one way to do it. There is no 1 way to plumb fuel, but yours does not appear to fall in the correct way category.
The Aeromotive illustration shows exactly what you say it should be. The line from the bottom of the regulator is hooked to the return line to the tank.. Look again.
That's not going to work. The FPR is a measured release valve. It will control the pressure between the pump and the FPR. After the FPR, it's a dump of excess fuel back to the tank. The way you have it plumbed, you'll have little to no pressure in the fuel rails.
The best way to do it is the diagram from Aeromotive.
Why does he have arrows showing fuel coming in from the bottom then?
In the Aeromotive illustration it says the line from the bottom is the return to the tank.
I am speaking of the diagram, not the photo. The Aeromotive diagram is correct
I just figured out the photo. It IS wrong. If he goes by the Aeromotive illustration below it it will be right.
I clarified my original post.
As you have noticed, yes, the bottom line on the regulator is the feed.
This is how the system was set up on a recently purchased car. I had a large feeling that this wasn't correct at all but wanted some clarification. I fully intend on going off of the Aeromotive setup.
So one thing I'm noticing is that fuel pressure sits at 50psi on idle. Under load, it increases, obviously, to about 60 (when rev'd to maybe 2500-3000?) but after letting off, pressure will drop to about 45psi.
The issue that was leading me to assuming this was incorrect was the fact that the car needs to prime three separate times or so in order to actually fire/start. It's tuned on Sunoco E85R. The current start procedure is "Key on, let it prime, ign/start, key off" three times. In each procedure, it'll hold 50 pounds of fuel pressure. The second time it'll usually start to fire but not fully. The third or fourth time, it'll actually start.
Am I correct in assuming the starting issue lines within how the lines are routed/plumbed?
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Fuel return/feed question 
