gpetry

Doing a new install on a Holley Stealth Ram. Since Holley no longer offers an adjustable fuel pressure regulator, the fuel line and crossover line kit no longer includes the 90 degree fitting to add a Schrader valve to to system. I have added an adjustable fuel pressure regulator, so I need to be able to get a good fuel pressure reading set set the regulator. I know the line size is 6AN, but what is the size of the thread size on the end of the fuel rail? Alternatively, can I use a 6AN to 6AN with a schrader port on the back side of the fuel rail where it attaches to the return line to the tank?

anesthes

iTrader: (12)

Not sure what you are asking exactly. The thread on the rail is a -6 ORB.

You should use a remote regulator with integrated gauge port, similar to what I'm using here. Run the lines for parallel feed without crossovers.:

gpetry

The -6ORB fitting size helps a lot. The older kits provided 90 degree fittings that were 6ORB to 6AN with a schrader port in them. That is what I am looking for. The second part of the question was if I can't find that fitting to put a port where the crossover line attach, will I get the correct fuel pressure reading if I put the port where the fuel rail exits to the return line (I have plenty of room back there for a ported straight fitting there) or does the pressure drop by the time it gets to the return line?

anesthes

iTrader: (12)

In a perfect world, the fuel pressure should be equal and even everywhere in the system, so the placement of the gauge is doesn't matter.

In reality, there is some small variation. I have an electronic sender in my left rail which runs to the ECM to log fuel pressure, and I have the mechanical gauge in the regulator housing.

Again, I'd recommend using a WYE fitting and feeding both rails in parallel, and then running the discharge out the front into the regulator.

-- Joe

gpetry

Already have the Kirban regulator that goes in the drivers side fuel rail, so the wye won't work in my situation

anesthes

iTrader: (12)

Gotcha. You should be able to find the fittings you need then. As long as it's not huge injectors or a lot of power the single feed/return should be fine.

-- Joe

gpetry

Just a little 383 with 38lb injectors, aluminum heads and a decent street cam. Street car only - A/C and power brakes. Nothing crazy.

anesthes

iTrader: (12)

Nothing wrong with that, my Corvette is set up that way. 450ish HP, A/C. Nice beach cruiser.


-- Joe