#1  
Old 08-11-2021, 08:52 AM
fairwayhit fairwayhit is offline
Senior Member
 
Join Date: Mar 2014
Location: Colorado Springs
Posts: 116
Default Adding fuel return line

My lemans didn’t have a fuel return line. I’m am going to use an MSD atomic fuel injection throttle body, and a robbmc surge tank that requires a return to the fuel tank

I am mounting the surge tank next to the charcoal canister on the passenger side radiator support. I’d like to retain the vent line to the charcoal canister

I’ve heard that I could use a chevelle fuel line down the passenger side, but I would have to lift the body off the frame to install it. I don’t want to mess with that because it is a convertible and all of the body panels line up really well right now.


I was thinking I might use the existing vent line as a return and then run some sort of flexible line for the vent. It’s a low pressure return, but I want to make sure I don’t have a safety issue. Does anyone have any suggestions on the best way to do this?


Sent from my iPhone using Tapatalk

  #2  
Old 08-11-2021, 01:56 PM
XLR8STEVE's Avatar
XLR8STEVE XLR8STEVE is offline
Senior Member
 
Join Date: Jul 2016
Location: Detroit Area
Posts: 190
Default

I used PTFE steel braided lines for fuel and return on my fuel inj setup.

__________________
[SIGPIC]
Steve
  #3  
Old 08-11-2021, 05:11 PM
fairwayhit fairwayhit is offline
Senior Member
 
Join Date: Mar 2014
Location: Colorado Springs
Posts: 116
Default Adding fuel return line

Did you just route them along the inside of the frame rail and over the axle?


Sent from my iPhone using Tapatalk


Last edited by fairwayhit; 08-11-2021 at 05:32 PM.
  #4  
Old 08-12-2021, 08:01 AM
OCMDGTO's Avatar
OCMDGTO OCMDGTO is online now
Ultimate Warrior
 
Join Date: Sep 2014
Location: Ocean City Md
Posts: 1,194
Default

I ran both feed and return over the axle and inside the frame rail on the passenger side. The stock return line might not be big enough, most manufacturers will say to make feed and return equal size. Mine are both 8an, you might get away with 6an with high pressure FI. Get a good regulator and a fuel pressure guage you can read inside the car.

Steve, I LOVE that wheels up pic of your car!

__________________
Chris D
69 GTO Liberty Blue/dark blue 467, 850 Holley, T2, Edelbrock Dport 310cfm w Ram Air manifolds, HFT 245/251D .561/.594L, T400, 9" w 3.50s 3905lbs 11.59@ 114, 1.57/ 60'
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 08:54 AM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Copyright © 2017