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#1 |
Registered User
Join Date: Apr 2011
Location: Redding, CA
Posts: 23
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65- Factory Tank for EFI
Hey Everyone,
I finally finished building my TPI engine for swapping into my dads 65 C10. I do have a question though. I am using the factory tank in the factory location(behind the seat). I know I need an return line for the EFI system and I am planning on drilling and tapping a return line into the sending unit(and putting a hose down into the bottom of the tank to prevent splashing). Has anyone done this before? I am not interested in moving the tank to under the bed or anywhere else, and I really need to do this on a ultra tight budget(spent all the $$ I had for this year on getting the motor ready, need to do the truck prep-work as cheap as humanly possible for now, can go back and make upgrades later). If no-one has done this before, I will have to do a write-up on it(planning on doing one for the motor install anyway). Edited to add: I will be using a Ford E2000 Fuel Pump as an Inline pump, probably mounted on a fuel rail somewhere, low pressure fuel line feeding it, high pressure from the fuel pump to the motor, and low pressure for the return line from the motor to the tank. Last edited by scoutcamper; 05-11-2016 at 08:28 PM. |
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#2 |
Registered User
Join Date: Apr 2011
Location: Redding, CA
Posts: 23
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Re: 65- Factory Tank for EFI
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#3 |
It's Better With Nitro
Join Date: Apr 2008
Location: Chino Hills, CA
Posts: 2,261
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Re: 65- Factory Tank for EFI
I modified a stock tank for a friend many years ago so he could run a Ram Jet 350 crate engine. I welded in a fitting at the bottom of the tank for a pipe to -10 AN fuel supply and two fittings for pipe to -8 AN fittings at the top of the tank for the fuel return and vent. He ran an Aeromotive A1000 pump.
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1963 C-10: Deluxe-optioned cab, shortbed, fleetside Pontiac 462 ci, Kauffman D-Port alum. heads 4L80E, narrowed sheetmetal Ford 9-inch Tubular front and rear suspension Custom 6-piston front disc and 4-piston rear disc brakes |
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#4 |
Registered User
Join Date: Apr 2011
Location: Redding, CA
Posts: 23
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Re: 65- Factory Tank for EFI
Welding on a tank that contained fuel?
![]() I have looked at that pump before, but that breaks my budget for this year, probably going with an Airtex 8248 after reading reviews on the Ford E2000... |
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#5 |
Registered User
Join Date: Jun 2012
Location: Portland
Posts: 1,330
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Re: 65- Factory Tank for EFI
I did it about 8 or 9 years ago in college. I was paranoid, so I emptied the tank and filled it with water, then drilled and then JB welded a fitting in that I could hook a hose to. Was likely overkill. If I were to just drill again I'd use grease on the bit, and make sure the tank was as full as possible. Liquid fuel will be a lot more resistant to igniting than gas vapors, which would be present in an empty tank.
Ideally though, you could use a new factory tank, and weld in the proper fitting then install it into the ride. One idea, and not sure if there is room, is to weld a fitting and tube into the sending unit, since you could remove that. |
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#6 | |
It's Better With Nitro
Join Date: Apr 2008
Location: Chino Hills, CA
Posts: 2,261
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Re: 65- Factory Tank for EFI
Quote:
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1963 C-10: Deluxe-optioned cab, shortbed, fleetside Pontiac 462 ci, Kauffman D-Port alum. heads 4L80E, narrowed sheetmetal Ford 9-inch Tubular front and rear suspension Custom 6-piston front disc and 4-piston rear disc brakes |
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#7 |
Senior Member
![]() Join Date: Aug 2008
Location: Long Beach, CA
Posts: 1,813
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Re: 65- Factory Tank for EFI
I have thought a lot about how best to add a high pressure fuel pump to the existing tank behind the seat so that I have a plan once I'm ready to swap the 8.1l in.
For fuel return I had the same conclusion as you did to simply braze a fitting onto the fuel sender and drop a tube down into the bottom of the tank. For the pickup my main worry is fuel starvation at low fuel levels in the tank. I have heard that with no baffling, and a tank that is close to empty that you might starve the pickup tube during cornering. Maybe this is more of an issue with the under bed tanks than it is with the behind the seat tanks due to shape? I'm really not certain. But regardless I have given thought to adding some kind of small catch basin with weep holes to the bottom of the pickup tube on the sending unit. But I think it would be difficult to get such a thing back into the tank through the small shallow opening. Then I saw some kind of fuel mat product recently from Holley or one of the other aftermarket carb companies. I thought that might work to solve the sloshing and starvation problem. But I've not seen it used in a behind the seat tank. I don't know whether your TPI needs a low or high pressure pump, but n I've had several pumps from bosch to trick flow recommended to me. I think all of these are rotary vane type non-positive displacement pumps that essentially use a liquid seal to be effective. As long as you can prime it with fuel, and locate it below the tank, then you shouldn't ever really have an issue with it sucking air and cavitation unless you run the tank dry. Sure it'll be a little louder but as long as you mount it using rubber pad or dampersomething then I think it'll work just fine. Then high pressure supply and return lines are just a matter of typical fittings and adapters. I'm curious to see what you end up doing since I don't know when I'll get around to actually doing my swap.
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Jason M. @argonaut62 1972 K5 Blazer CST, Turquoise 1966 K20 Short Fleet Pickup, Big Ugly 1964 C10 Short Fleet, Gertrude 2001 Porsche 911 Carrera 1996 Ford Bronco XLT 1980 Jeep Wagoneer 2008 Honda CBR1000RR 2005 Honda RC51 1981 Honda CB750C No dis-assemble Johnny Five! No dis-assemble! |
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#8 |
Registered User
Join Date: Feb 2015
Location: Montevallo, AL
Posts: 272
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Re: 65- Factory Tank for EFI
Have you considered using a surge tank? That way, you can avoid a second fuel port in your tank and keep air and fuel starvation from being an issue. The down side is you need a second pump to get fuel to the surge tank. I have an aftermarket tank with a sump in the back. It had a return line plumbed into it so I did not need to add a line. There is a baffle and the back half is filled with foam to minimize sloshing. Works well so far.
As for pumps, I use a Walbro GSL 392. Good pump-you can get them on line relatively cheap. |
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#9 |
60-66 Nut
![]() ![]() Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
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Re: 65- Factory Tank for EFI
It seems to be that it might be easier to either buy or build your own such as the Fuel Command Center offered by FITech.
http://fitechefi.com/default.asp.pg-...lCommandCenter
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Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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#10 |
Registered User
Join Date: Apr 2011
Location: Redding, CA
Posts: 23
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Re: 65- Factory Tank for EFI
Hey Everyone,
I decided on and am ordering a 1/2gal surge tank. I think this is the best way to deal with this. I do have a routing question though, see the attached diagram. Is there any reason I could or should NOT do this? It would save me a significant amount of work. In case the image makes no sense, I want to run my surge tank return to a T in the fuel line before my low pressure pump. Is this OK? Anything I missed on my diagram other than filters? (lines on surge tank indicate actual placement) Thanks in advance! |
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#11 |
Senior Member
![]() Join Date: Jan 2011
Location: Hayes Va
Posts: 4,569
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Re: 65- Factory Tank for EFI
Many years ago when we first started running mechanical injection we used a 1 gallon surge tank made using a holley float bowl to control the fuel level. Google it and you will get the idea. Worked fine. The next car we built just moved the fuel cell to the front to greatly simplify the system. Something like that may work for your application.
Jimmy
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60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic |
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#12 |
1962 C-10
Join Date: Apr 2005
Location: Las Vegas, New Mexico
Posts: 4,978
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Re: 65- Factory Tank for EFI
I could be wrong, but I don't believe you'll need the 'low pressure' return line.
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Joseph Chavez ![]() "See the USA in a Chevrolet!!" ......................_____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ 1962 C10 Shortbed Fleetside 327/th350 GV overdrive 1974 C10 Longbed Fleetside 350/th350 "The Trash Truck" 1999 Chevy 2500 OBS, Longbed 5.7/4L80E 4x4 2015 GMC Sierra SLE 1500 4x4 |
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#13 |
Senior Member
![]() Join Date: Feb 2009
Location: Redding, Ca
Posts: 333
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Re: 65- Factory Tank for EFI
This will NOT work. If the goal is to purge air from system, this will actually take air from surge tank and dump it directly into low pressure fuel pump and pump it right back into surge tank. You will need return to main fuel tank to rid air from system.
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#14 |
Registered User
Join Date: Jun 2012
Location: Portland
Posts: 1,330
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Re: 65- Factory Tank for EFI
Yeah the problem I see is that you'd end up with the low pressure and high pressure working against each other, as the low pressure fights to draw fuel from the surge back into the loops, while the high pressure is trying to draw from the surge and push towards the engine. You've essentially got two pumps sucking from opposite ends of the same straw, unless I'm mistaken.
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#15 |
Registered User
Join Date: Dec 2014
Location: Ada Oklahoma
Posts: 112
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Re: 65- Factory Tank for EFI
look at fitech they have a comand center that uses the factory tank and factory fuel pump to power a EFI motor. pretty cool
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#16 |
Registered User
Join Date: Feb 2008
Location: Sidney,b.c.
Posts: 4,425
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Re: 65- Factory Tank for EFI
what I had with my Detroit in my panel was the stock tank(rear mounted). detroit filter system with their injector pump. the return line tee'd into the filler tube. worked well for over 20 years.
ron |
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#17 |
Registered User
Join Date: Jul 2013
Location: Poway Ca
Posts: 16
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Re: 65- Factory Tank for EFI
http://67-72chevytrucks.com/vboard/s...d.php?t=610694
Found this one awhile back...lookn into it too. |
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#18 |
Senior Member
![]() Join Date: Feb 2009
Location: Redding, Ca
Posts: 333
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Re: 65- Factory Tank for EFI
Update: We have installed the TPI350 in truck and I bought a new sender and welded in a return line using brake tubing. Turned out pretty nice. The surge tank worked well also. All in all, great upgrade to truck.
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#19 |
But Found Her 25yrs Later!
![]() Join Date: Oct 2010
Location: Oregon City, Oregon
Posts: 10,468
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Re: 65- Factory Tank for EFI
I've been trying to think of something simple for the stock tank also. 4 years later.... Anyone have any more ideas using the stock tank?
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I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035 |
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#20 |
But Found Her 25yrs Later!
![]() Join Date: Oct 2010
Location: Oregon City, Oregon
Posts: 10,468
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Re: 65- Factory Tank for EFI
As far as welding on a tank.... I think I wouldn't be as worried filling the tank with water. Afterwards let it set and dry out, but then with ethanol gas, any remnant moisture would just bond with the ethanol anyway.
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I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035 |
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#21 |
Moderator
![]() ![]() Join Date: Aug 2011
Location: China Spring, TX
Posts: 7,280
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Re: 65- Factory Tank for EFI
Have looked through this thread? - http://67-72chevytrucks.com/vboard/s...fi+in+cab+tank
Also starting on post 10 - http://67-72chevytrucks.com/vboard/s...highlight=tank
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Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? Last edited by The Rocknrod; 05-23-2021 at 03:00 PM. |
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#22 | |
Account Suspended
![]() Join Date: Aug 2005
Location: Southern UT
Posts: 905
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Re: 65- Factory Tank for EFI
Quote:
This would be a great time to get the tank out of the cab and use a 69 Camaro tank. You can get them baffled for EFI that look like stock 69 Camaro tanks. Keeps fuel from sloshing around and you can always upgrade later to a in tank fuel pump. Last edited by SOON2BLAZE; 05-23-2021 at 06:45 PM. Reason: spellin |
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#23 |
Registered User
Join Date: Apr 2019
Location: San Antonio
Posts: 116
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Re: 65- Factory Tank for EFI
You can use your factory tank and run a return line. Depends on your setup. I used the Holley Sniper Stealth kit on my 66. The kit comes with a Holley fuel regulator from which I used the return line from it back to the tank. some EFI kits have a built in regulator that you have to run a line from the FI all the way back to the tank.
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#24 | |
Registered User
![]() Join Date: Apr 2017
Location: Talladega Alabama
Posts: 860
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Re: 65- Factory Tank for EFI
Quote:
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#25 |
Registered User
Join Date: Jun 2018
Location: Sacramento
Posts: 72
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Re: 65- Factory Tank for EFI
European cars with mechanical injection (k-jet) use a small in tank low pressure pump and in-line high pressure pump. You could use the pump from those cars (MB, 80s vw and Volvo 240 turbos) on the line coming out of of the tank. For the return plumb it into the sender like above and it would work fine.
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