|
|
| Re: Fuel Return [message #249154 is a reply to message #249124] |
Tue, 06 May 2014 10:08   |
George Beckman
Messages: 1085
Registered: October 2008
Location: Colfax, CA
Karma: 11
|
Senior Member |
|
|
| Jon Payne wrote on Mon, 05 May 2014 13:23 |
Hi all,
For the past few weeks I have been in the process of restoring the fuel system. Part of the project is to install in-tank fuel pumps and since I plan to eventually install the Howell TBI that Applied GMC sells I opted to install the higher pressure fuel pumps. So to deal with the increase in fuel pressure, which is not carb friendly, I needed to install a fuel pressure regulator which requires a fuel return. So where to put the fuel return? I heard it is common to place the return in the fuel filler tube but I really wasn't keen on that approach for several reasons. So I had the idea to install the fuel return on the sender itself and since the senders that Applied GMC sells has plenty of room for a third tube I went ahead and took the sender to a local welding shop and had them weld in the fuel return tube for me. By the way the sender with the fuel return is in the forward (reserve) tank
See below pictures.
I hope to have the whole project done by the end of next weekend and will post the pictures from beginning to end.
Jon
|
Jon,
You might want to think about putting the return in both tanks and a switch that returns to the one you are using. In tank pumps (all EFI pumps) pump lots of gas. Many of us with EFI find that when fuel is getting low so it is not transferring the pumped tank goes down really fast. This requires switching back and forth.
My return is in the fill tube, but that mostly runs back to the rear main. When I switch to the reserve tank, the gauge may say 1/3 (not necessarily accurate, just what it says) but in 5 minutes it is almost on empty.
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
|
|
|
|
| Re: Fuel Return [message #249158 is a reply to message #249154] |
Tue, 06 May 2014 11:47 |
Jon payne
Messages: 495
Registered: May 2008
Karma: 1
|
Senior Member |
|
|
Hi George,
Thanks for the advice. My initial plan was to do just that but at the last minute I decided to just have the one fuel return. To be honest I didn't want to add anymore complexited and to the system and anymore time. Sounds like I may regret that decision! If it gets to be a problem I can always add the return later.
Jon Payne
76 Palm Beach
Westfield,IN
|
|
|
|
|
|
| Re: Fuel Return [message #249198 is a reply to message #249158] |
Fri, 09 May 2014 07:02 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
|
Senior Member |
|
|
Jon Payne wrote on Tue, 06 May 2014 11:47Hi George,
Thanks for the advice. My initial plan was to do just that but at the last minute I decided to just have the one fuel return. To be honest I didn't want to add anymore complexited and to the system and anymore time. Sounds like I may regret that decision! If it gets to be a problem I can always add the return later.
On ours I only have one return and that is to the aux tank. I figure it will keep the aux tank up and any extra will transfer through the fill pipe to the main tank. Then, when the main tank is "dry" the aux will have the max fuel the OEM system allows. Also on both of my GMC's the aux tanks were badly rusted and the main tanks were not. I attribute that to insufficient fuel flow through the aux tank. Return to only the aux tank will provide additional flow.
I also agree you need to direct the return fuel flow to the bottom of the tank and not let it splash around.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
