|
|
Joined: Sep 2012
Posts: 154
Member
|
|
Member
Joined: Sep 2012
Posts: 154 |
Finally at the point on my restoration where im getting ready to install new fuel tank, sending unit and lines. Was wondering if i should go with just a single fuel line or add the return line as well. Engine is a 400 with 670 holley street avenger, also gonna have vintage ac.
|
|
|
|
|
Joined: Jul 2003
Posts: 4,248 Likes: 14
Premium Member
|
|
Premium Member
Joined: Jul 2003
Posts: 4,248 Likes: 14 |
I vote yes. Will help with keeping the fuel in the lines cooler. I think it’s more important now with the current gas designed for high pressure fuel pumps and fuel injection.
|
|
|
|
|
Joined: Apr 2010
Posts: 6,758
FGF Premium Member
|
|
FGF Premium Member
Joined: Apr 2010
Posts: 6,758 |
Finally at the point on my restoration where im getting ready to install new fuel tank, sending unit and lines. Was wondering if i should go with just a single fuel line or add the return line as well. Engine is a 400 with 670 holley street avenger, also gonna have vintage ac.
Yes, eliminates vapor lock. Eliminates venting issues at the tank (gas cap) and the carb.
Engine Test Stand Playlist: https://www.youtube.com/playlist?list=PLwoxyUwptUcdqEb-o2ArqyiUaHW0G_C88restoring my 1968 Firebird 400 HO convertible (Firedawg) 1965 Pontiac Catalina Safari Wagon 389 TriPower (Catwagon) 1999 JD AWS LX Lawn tractor 17hp (my daily driver) 2006 Sequoia 2017 Murano (wife's car) 202? Electric car 203? 68 Firebird /w electric engine 2007 Bayliner 175 runabout /w 3.0L Mercuiser__________________________________________________________
|
|
|
|
|
Joined: Aug 2002
Posts: 7,495 Likes: 1
Premium Member
|
|
Premium Member
Joined: Aug 2002
Posts: 7,495 Likes: 1 |
Yes. Install it before you get more stuff in the way. Look at it this way even if you don't need it now( which you do) at least it will be there later whe you figure out that you do need one.
Also, do yourself a favor and use 3/8" steel line. Won't cost you that much more and if you ever go FI it'll work out better.
|
|
|
|
|
Joined: Apr 2010
Posts: 6,758
FGF Premium Member
|
|
FGF Premium Member
Joined: Apr 2010
Posts: 6,758 |
Yes. Install it before you get more stuff in the way. Look at it this way even if you don't need it now( which you do) at least it will be there later whe you figure out that you do need one.
Also, do yourself a favor and use 3/8" steel line. Won't cost you that much more and if you ever go FI it'll work out better. If you use steel lines be sure you get them prebuilt as steel line is very hard to flare.
Engine Test Stand Playlist: https://www.youtube.com/playlist?list=PLwoxyUwptUcdqEb-o2ArqyiUaHW0G_C88restoring my 1968 Firebird 400 HO convertible (Firedawg) 1965 Pontiac Catalina Safari Wagon 389 TriPower (Catwagon) 1999 JD AWS LX Lawn tractor 17hp (my daily driver) 2006 Sequoia 2017 Murano (wife's car) 202? Electric car 203? 68 Firebird /w electric engine 2007 Bayliner 175 runabout /w 3.0L Mercuiser__________________________________________________________
|
|
|
|
|
Joined: Sep 2012
Posts: 154
Member
|
|
Member
Joined: Sep 2012
Posts: 154 |
A return line it is then, thanks
|
|
|
|
|
Joined: Jun 2013
Posts: 48
Member
|
|
Member
Joined: Jun 2013
Posts: 48 |
This is strange. I researched the need for a return fuel line recently, and thought that the general consensus for a Pontiac 400, was "no", unless you have extreme fuel needs. My recollection was that the fuel line routing is "cold" enough to avoid vapor lock.
|
|
|
|
|
Joined: Oct 2003
Posts: 1,770
Member
|
|
Member
Joined: Oct 2003
Posts: 1,770 |
All A/C cars had the return line. My 69 w A/C does. I recently installed the Inline Tube SS lines, and was happy with them.
1969 Firebird conv't A/C 400 4-Speed
|
|
|
|
|
Joined: Jan 2012
Posts: 1,202 Likes: 1
Member
|
|
Member
Joined: Jan 2012
Posts: 1,202 Likes: 1 |
Best to use the return line to help with avoiding vapor lock.
|
|
|
|
Forums57
Topics35,534
Posts298,850
Members8,862
| |
Most Online19,810
Feb 1st, 2026
|
|
|
0 members (),
410
guests, and
58
robots. |
|
Key:
Admin,
Global Mod,
Mod
|
|
|
There are no members with birthdays on this day. |
|
|
|
