Question about fuel rails
Question about fuel rails I have an '02 5.3L that I converted to an LS1 intake and fuel rail setup, but I'm not entirely sure of how to set up my regulator system. I was under the assumption that all F-bodies had the regulator in the tank and ran a returnless system, but the rail that I have (supposedly from an F-body) has two fittings (although one looks like it may be a valve for pressure testing) and what looks to be a sealed regulator that has no vacuum hookup. I would like to run a returnless system if I can, since I had to cut my stock fuel lines out to do some frame patching anyway.
Basically, does anyone know if my rail has a built-in regulator that doesn't use vacuum, or do I need to run one of those corvette filters? Thanks.
Basically, does anyone know if my rail has a built-in regulator that doesn't use vacuum, or do I need to run one of those corvette filters? Thanks.
U R most likely right, that you have a returnless rail.
1. The small "fitting" is a schraeder valve, [-4AN], for pressure testing.
2. The "regulator" is actually a pulse dampener, and will not have a vac line.
1. The small "fitting" is a schraeder valve, [-4AN], for pressure testing.
2. The "regulator" is actually a pulse dampener, and will not have a vac line.
Is there some kind of replacement fitting for the test port? It doesn't look like there is a valve in there (I've seen and tested pressures from a schrader before). I'm assuming it could have blown out or been damaged in shipping.
So I can run the Corvette regulator/filter assembly with this rail? Do they make an adjustable FPR for that setup? I plan to be going turbo eventually, so I'd like to put the adjustable one in while I'm building the car.
So I can run the Corvette regulator/filter assembly with this rail? Do they make an adjustable FPR for that setup? I plan to be going turbo eventually, so I'd like to put the adjustable one in while I'm building the car.
What I've done in the past is take LS1 fuel rail and silver solder or weld a -6AN steel fitting to it to plumb the system in AN. The port on the end of the fuel rail should have a schrader valve in it with a plastic cap to protect the threads
If you are going to run a turbo and want to run a separate pressure regulator (you don't need to - I use the Corvette regulator on my turbo setup) the Aeromotive unit is hard to beat.(I'm using one on the car I'm building now)
The problem with the Corvette fuel filter/regulator is that by the time you buy all the adapters to AN fittings and the Corvette filter/regulator, you could have bought a nice Aeromotive regulator that was fully adjustable and stable. In addition you have a butt-load of connections which is an invitation to leaks, and leaks can lead to fire. ( For God's sake don't use rubber hose and hose clamps!)
In addition, the Corvette filter/regulator is pretty cheap as a fuel regulator, but as a filter it is damned expensive. How do you feel about spending $50 to change your fuel injection filter?
Buy the Aeromotive FPR and be done with it. Plumb a stock GM fuel injection filter in front of it that you can replace for $13 once a year.
Just my two cents
If you are going to run a turbo and want to run a separate pressure regulator (you don't need to - I use the Corvette regulator on my turbo setup) the Aeromotive unit is hard to beat.(I'm using one on the car I'm building now)
The problem with the Corvette fuel filter/regulator is that by the time you buy all the adapters to AN fittings and the Corvette filter/regulator, you could have bought a nice Aeromotive regulator that was fully adjustable and stable. In addition you have a butt-load of connections which is an invitation to leaks, and leaks can lead to fire. ( For God's sake don't use rubber hose and hose clamps!)
In addition, the Corvette filter/regulator is pretty cheap as a fuel regulator, but as a filter it is damned expensive. How do you feel about spending $50 to change your fuel injection filter?
Buy the Aeromotive FPR and be done with it. Plumb a stock GM fuel injection filter in front of it that you can replace for $13 once a year.
Just my two cents
"Is there some kind of replacement fitting for the test port? It doesn't look like there is a valve in there (I've seen and tested pressures from a schrader before). I'm assuming it could have blown out or been damaged in shipping."
If it's the schraeder port, there'll be a screw in valve in it. If it's not there, someone took it out to hook up a gauge. I highly doubt it "blew out, or was damaged in shipping"...
If it's the schraeder port, there'll be a screw in valve in it. If it's not there, someone took it out to hook up a gauge. I highly doubt it "blew out, or was damaged in shipping"...
I did the same swap, truck intake/rail to LS1 intake/rail.
Mine came without the schrader valve too. I removed the valve and screw cap from the truck rail and used it on the LS rail.
I assume you only have one 3/8" quick disconnect port, so it uses an external regulator.
Yes, you can use the 99-02 vette filter regulator, that's what I'm using.
Cant answer about a referenced, adjustable regulator for boosted applications though.
Mine came without the schrader valve too. I removed the valve and screw cap from the truck rail and used it on the LS rail.
I assume you only have one 3/8" quick disconnect port, so it uses an external regulator.
Yes, you can use the 99-02 vette filter regulator, that's what I'm using.
Cant answer about a referenced, adjustable regulator for boosted applications though.
