LS7 Which regulator?

[ss dave]

Does the LS7 use a Vacuum regulator or not?
Trying to decide which to use for my LS7 tune.
Thanks

[XcYZ]

I'm using an Aeromotive 13101 and no vacuum reference.

[Bowtieracing]

I'm using an Aeromotive 13101 and no vacuum reference.

Scott, what fuel filter and line size you are useing?

[XcYZ]

Up to the filter it's -8, past the filter and to the rail, it's -6. I can't remember off hand the brand of fuel filter, but it's a large capacity 10 micron unit with -8 fittings.

[Bowtieracing]

Up to the filter it's -8, past the filter and to the rail, it's -6. I can't remember off hand the brand of fuel filter, but it's a large capacity 10 micron unit with -8 fittings.

Thanks Scott!!

If i recall right the out port in Ricks tank was 6AN ? Do you have larger or did you just use adapter fitting there?

[XcYZ]

I used a Trickflow 10 micron filter (http://www.summitracing.com/parts/TFS-23002/).

My Rick's tank has -8 fittings, my fuel system is all -8 until after the fuel filter. My sending unit for the fuel pressure gauge is in the -6 line.

[Bowtieracing]

My Rick's tank has -8 fittings, my fuel system is all -8 until after the fuel filter. My sending unit for the fuel pressure gauge is in the -6 line.


Great..mine has #6 even i did order it with bigger walbro pump:question:

[67ragtp]

Scott- How did you plumb the sender into the 6 line?, Im thinking TEE mounted up on the back of the engine or firewall close to the rails?

Thanks Rich

[XcYZ]

Rich, sorry for the delay, I missed this post. :_paranoid :lol:

Russell makes an inline -6 fitting with a 1/8 NPT fitting:

http://www.summitracing.com/parts/RUS-670343/

http://static.summitracing.com/global/images/prod/large/rus-670343_w.jpg

[67ragtp]

Thanks- Last night I was thumbing through my russell catalog and saw that fitting. I assume you mounted it right off the fuel rail?

I believe you told me your regulator is mounted in the back , did you run a short piece of #6 line from the return port on the reguator to the tank?

Let me get this right- #8AN from the in tank fuel pump to the regulator- out of the regulator with # 8AN up to the firewall through the filter then convert to 6 up to the fuel rail?

Thanks Scott

Rich

[XcYZ]

The way I set my fuel system up, the regulator is mounted right in front of the tank. The supply line from the tank is -8, the return line is -8, the fuel line out of the regulator is -8 as well. From there is runs to the Trickflow 10 micron filter that has the built -8 fittings. Directly connected to the output of the filter, I used a -8 to -6 reducer coupling and the fuel pressure take off fitting is connected to that. From there, it's -6 line to the fuel rail.

[67ragtp]

Scott-Appreciate the info - Thank you

Rich

[Pantera EFI]

I weld a Stainless Steel "bung", a 12mm X 1.25 nut with one end rounded to the internal size of the Stainless fuel rail tubing opposite the entry rail.

I then add an "COTS" Commercial Off The Shelf fuel regulator, threaded on the fuel entry end with manifold vacuum reference.

One thing to remember is that when the "regulator" is "manifold vacuum" referenced, the BARO correction will be a normal decreasing slope as the altitude is increased.

When the "regulator" is "open to free air" for pressure reference, the BARO correction will be inverted as the altitude is increased. (more fuel needed at light load).

Lance