Boost ref. LS6 fuel rails
07-20-2017, 10:37 AM
#1
Boost ref. LS6 fuel rails I got a killer deal on an LS 6 intake with stock fuel rails, TB, no injs.
The fuel rails have the stock reg., as I remember the filter had the return in it. How are you guys boost ref the fuel pressure with the reg on the fuel rails, can you gut the stock reg, and run a boost ref return style reg.
The fuel rails have the stock reg., as I remember the filter had the return in it. How are you guys boost ref the fuel pressure with the reg on the fuel rails, can you gut the stock reg, and run a boost ref return style reg.
07-20-2017, 12:02 PM
#2
On The Tree
Join Date: Aug 2005
Location: Brooklyn, N.Y.
Posts: 143
Likes: 0
Received 0 Likes
on
0 Posts
That piece between the rails is a fuel pressure damper, not a regulator, leave that alone. I believe the fuel filters with built in return have the regulator built in. Use a regular non return fuel filter. Remove the shrader valve in the driver side rail and connect the regulator to that using -an4 fittings. I used an4 to an6 to fit my regulator. Then from the regulator run a line back to the return line that the filter was connected to, I used 3/8" copper/nickel alloy. tubing.
07-20-2017, 03:43 PM
#4
On The Tree
Join Date: Aug 2005
Location: Brooklyn, N.Y.
Posts: 143
Likes: 0
Received 0 Likes
on
0 Posts
I originally had my fuel pressure sensor on the shrader too. After installing the brfpr I just put the sensor on the regulator. Using the shrader valve as a return works fine for many of us. I was a little concerned at first, but after doing a little searching I found that the stock lines have been used many times and run well into the 9's with no problem. My car is a street car, self tuned on e85, fuel pressure is set at 65 psi.
07-20-2017, 04:01 PM
#5
TECH Senior Member
iTrader: (96)
Join Date: Aug 2007
Location: Turnin' Wrenches Infractions: 005
Posts: 24,240
Likes: 0
Received 79 Likes
on
70 Posts
That piece between the rails is a fuel pressure damper, not a regulator, leave that alone. I believe the fuel filters with built in return have the regulator built in. Use a regular non return fuel filter. Remove the shrader valve in the driver side rail and connect the regulator to that using -an4 fittings. I used an4 to an6 to fit my regulator. Then from the regulator run a line back to the return line that the filter was connected to, I used 3/8" copper/nickel alloy. tubing.
07-21-2017, 01:01 PM
#6
Just run your supply and return to an aftermarket regulator. Then plumb a dead headed line form the regulator to the OEM fuel rail. That way you aren't limited on the return line size and you can run a boost referenced regulator at normal fuel pressures.
I like to add an additional -4 feed from the regulator to the pressure port on the rails too.
Like this.
I like to add an additional -4 feed from the regulator to the pressure port on the rails too.
Like this.
