surge tank versus in fuel tank pump

For everything related to using Fuel Injection in an FSJ.
Post Reply

Topic author
marc
Posts: 166
Joined: Tue Aug 11, 2020 8:24 am

surge tank versus in fuel tank pump

Post by marc » Sun Jan 15, 2023 1:50 pm

Contemplating putting fuel injection on my 84 j10. The cranky old BBD carb is frustrating. In my research, I have seen people posting about in line pumps, in tank pumps and surge tanks. My fuel injection experience which is very out of date, early VW systems with cranky injectors, leads me to think that the more opportunities for fuel purification the better so a filter into the surge tank, a surge tank to settle particulates and a filter into the TBI seems to me a way to help with reliability. I am wondering what more experienced folks think about the options? As the truck might migrate back to Calif., I want to keep that emission option open.
Thanks, Marc
J10 1984, very stock with AMC 258.
Truck appears to have been rebuilt or restored at one time

User avatar

Yeller
Posts: 868
Joined: Thu Apr 01, 2021 7:54 am
Location: Rogers County Oklahoma

Re: surge tank versus in fuel tank pump

Post by Yeller » Sun Jan 15, 2023 3:08 pm

I have several rigs been running EFI for a few decades trouble free. 2 of them have even migrated from TBI to port injection. They all have in line pumps with a standard paper inline pre filter before the pump and a fuel injection rated inline filter after the pump. No special pick ups in the tank, just standard carburetor era pick ups in the tank. No surge tank, have never found that they do anything other than sound good on paper and look fancy. I tend to use my vehicles in ways that most wouldn’t dream of and only time I’ve had issues is when they were in dire need of fuel anyway, as in 2 gallons from walking. Keep it simple. Simple is reliable.

Once you go fuel injection you’ll never want another carb. I’ve been running EFI since 1989 and did it as a high school kid because I was told it would never work.
The bus I ride is so short it is a yellow Smart Car full of squirrels, monkeys and clowns.

1970 J2500 Resto Mod
https://www.fsjnetwork.com/forum/viewt ... 12&t=21395

1974 Bronco “Broncno”
https://classicbroncos.com/forums/threa ... st-3411909


Topic author
marc
Posts: 166
Joined: Tue Aug 11, 2020 8:24 am

Re: surge tank versus in fuel tank pump

Post by marc » Sun Jan 15, 2023 4:37 pm

Yeller, do yu use the original fuel pickup from the tank?
J10 1984, very stock with AMC 258.
Truck appears to have been rebuilt or restored at one time

User avatar

Yeller
Posts: 868
Joined: Thu Apr 01, 2021 7:54 am
Location: Rogers County Oklahoma

Re: surge tank versus in fuel tank pump

Post by Yeller » Sun Jan 15, 2023 5:44 pm

Yes I do, I just get the pump and pre filter as close to the tank as reasonably possible along with the pump as low as possible. The pumps do not suck efficiently and need to be low enough to have mostly a siphon, the pump doesn’t have to be as low or lower than the tank, just as low as reasonably possible.

This is the pump I’ve been running.
https://www.amazon.com/Walbro-GSL392-Fu ... 13d670b6bc

Pre filter
https://www.amazon.com/WIX-Filters-Comp ... 194&sr=8-3

Fuel injection filter
https://www.amazon.com/Herko-Chevrolet- ... erado+1500
The bus I ride is so short it is a yellow Smart Car full of squirrels, monkeys and clowns.

1970 J2500 Resto Mod
https://www.fsjnetwork.com/forum/viewt ... 12&t=21395

1974 Bronco “Broncno”
https://classicbroncos.com/forums/threa ... st-3411909

User avatar

tgreese
Posts: 5928
Joined: Fri Jun 08, 2012 6:31 am
Location: Medford MA USA

Re: surge tank versus in fuel tank pump

Post by tgreese » Thu Jan 19, 2023 9:28 am

It is possible to run a surge tank with the original fuel pickup. No mods to the fuel tank needed. Works with either the original mechanical pump or a low-pressure electric pump near the fuel tank. Many Fords run this arrangement from the factory; the frame-mounted cartridge pump (like the above Walbro) was used with a low-pressure helper pump in or near the tank.

A spin-on fuel filter makes a nice surge tank. There's a thread on IFSJA that may help http://web.archive.org/web/201506051224 ... stcount=34

Hopefully you can see it via the Wayback. I can't view the EFI forum currently.
Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS/PDB, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination A/Ts, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
Dual Everything: '15 FCA Jeep Cherokee KL Trailhawk, ECO Green
Blockchain the vote.


Srdayflyer
Posts: 134
Joined: Mon Mar 18, 2019 2:08 pm

Re: surge tank versus in fuel tank pump

Post by Srdayflyer » Sun Jan 22, 2023 5:52 pm

my friend tried the surge tank but had issues with vapor lock, and had problems when he was at ouray 21, at altitudes above 7500 ft, 1 of the problems with fuel injection systems, is everyone trys to use the factory supply and return lines. the carb return line is 1/4 inch and creates back pressure issues with f.i. systems, i am running the holly sniper and had to run 3/8" lines per their recommendation, as they found anything less causes issues with excess back pressure in the sniper, and drivability problems

Post Reply

Who is online

Users browsing this forum: No registered users and 1 guest