EFI Fuel Pump Options

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Doppleganger

Doppleganger

Full Access Member
Joined
May 24, 2019
Posts
11,713
Reaction score
54,172
Location
OH-MI: Just like it sounds
First Name
Chris
Truck Year
1985
Truck Model
K20
Engine Size
5.7
Not sure about 'cheaper' but Edelbrock makes an add on pump setup (PN 36031) that goes between the mechanical pump and the new FI unit....and its adjustable from 30 - 90 psi. Whole reason was to be able to use the stock setup without replacing tanks or the switch solenoid.

They're about $400 from Summit. I have a new in the box unit much cheaper for sale.
 
Raybo135

Raybo135

Full Access Member
Joined
Jan 20, 2019
Posts
294
Reaction score
310
Location
Arvada, Colorado
First Name
Raymond
Truck Year
1976
Truck Model
K10 Silverado
Engine Size
400
Doppleganger said:
Not sure about 'cheaper' but Edelbrock makes an add on pump setup (PN 36031) that goes between the mechanical pump and the new FI unit....and its adjustable from 30 - 90 psi. Whole reason was to be able to use the stock setup without replacing tanks or the switch solenoid.

They're about $400 from Summit. I have a new in the box unit much cheaper for sale.
Click to expand...
That is the Sump pump that I have on my 1976 with an Edelbrock E-Street EFI 3600. The only problem with this setup that I see is there is no way to run a line back to the Fuel Tank as the instructions say. Mine tends to leak on warm days out of the bottom. I am going to change to an electric fuel pump and locate it right after the tank switch.
You must be registered for see images attach
 
Doppleganger

Doppleganger

Full Access Member
Joined
May 24, 2019
Posts
11,713
Reaction score
54,172
Location
OH-MI: Just like it sounds
First Name
Chris
Truck Year
1985
Truck Model
K20
Engine Size
5.7
I heard alot of good about it - I sold mine and the guy who bought it had 3 others. I preferred the OE-esque dual tanks / dual pumps approach.....I like redundancy. If one fails, I'm still moving. :)
 
Vbb199

Vbb199

B-rate Hillbilly Customs
Joined
Jan 12, 2018
Posts
8,875
Reaction score
14,900
Location
Salisbury NC
First Name
Vince
Truck Year
89, 79
Truck Model
89 Suburban R1500, 79 C10
Engine Size
350, 502
I guess I'm gathering here, this EP381 will work in a 88-91 gas tank and sending unit correct?

I'm in process of setting up holley efi on my k5's 502. I need 60 lbs of pressure, and what I'm seeing is, the 381 makes max 108 lbs.


I also read about the walbro 340 that appears to go right in the sending unit as well.

Thoughts?
 
LateOnTheBrakes

LateOnTheBrakes

5.3-Swapped 86 CUCV
Joined
Feb 2, 2020
Posts
463
Reaction score
123
Location
Virginia
First Name
Joshua
Truck Year
1986
Truck Model
CUCV
Engine Size
5.3
I would like to know the answer to this as well. I'm headed to the junkyard tomorrow and would like to get some parts. There is an 89 CK1500 at the yard and a bunch of vortec trucks.

Can I take the sender, pump, etc. from the CK and use it as a primer pump to my externally mounted walbro? Can I take a pump from a vortec truck and put it on the CK sender?
 
Frankenchevy

Frankenchevy

Proverbs 16:18
Joined
Jan 3, 2018
Posts
5,956
Reaction score
7,399
Location
USA
First Name
Jeremy
Truck Year
Square
Truck Model
CUCV
Engine Size
Small
Vortec (delco ep381) will mount on a tbi sender
 
LateOnTheBrakes

LateOnTheBrakes

5.3-Swapped 86 CUCV
Joined
Feb 2, 2020
Posts
463
Reaction score
123
Location
Virginia
First Name
Joshua
Truck Year
1986
Truck Model
CUCV
Engine Size
5.3
Yeah, I've got that from other reading. I kinda want to keep the TBI pump in there. I am not happy with the standalone harness I built I'm considering swapping to a carb and the TBI pressure would be in the same pressure range. Would an 89 junkyard sender drop in to my tank and seal correctly?
 
LateOnTheBrakes

LateOnTheBrakes

5.3-Swapped 86 CUCV
Joined
Feb 2, 2020
Posts
463
Reaction score
123
Location
Virginia
First Name
Joshua
Truck Year
1986
Truck Model
CUCV
Engine Size
5.3
I've also been confused what folks mean by the 87 tank. I like the side tank on my truck. Is it the 87 R10 pickup on rockauto?

You must be registered for see images attach
 
Vbb199

Vbb199

B-rate Hillbilly Customs
Joined
Jan 12, 2018
Posts
8,875
Reaction score
14,900
Location
Salisbury NC
First Name
Vince
Truck Year
89, 79
Truck Model
89 Suburban R1500, 79 C10
Engine Size
350, 502
@LateOnTheBrakes

Nobody answered me (at the time) so I took a shot in the dark on my own and used the acdelco EP381 in my 87-91 fuel sending unit and matched tank.

Works just fine.
The goal however is not to be a cheap ass and drive around with 1/8 of a tank all the time. Gas has to be somewhat full to keep the pump cool.
 
LateOnTheBrakes

LateOnTheBrakes

5.3-Swapped 86 CUCV
Joined
Feb 2, 2020
Posts
463
Reaction score
123
Location
Virginia
First Name
Joshua
Truck Year
1986
Truck Model
CUCV
Engine Size
5.3
Thanks. What is the 88-91 tank you are talking about? The 89 suburban? Did your sending unit work? I think I'm going to pick up the junkyard one because it is cheap.
 
Vbb199

Vbb199

B-rate Hillbilly Customs
Joined
Jan 12, 2018
Posts
8,875
Reaction score
14,900
Location
Salisbury NC
First Name
Vince
Truck Year
89, 79
Truck Model
89 Suburban R1500, 79 C10
Engine Size
350, 502
LateOnTheBrakes said:
Thanks. What is the 88-91 tank you are talking about? The 89 suburban? Did your sending unit work? I think I'm going to pick up the junkyard one because it is cheap.
Click to expand...


My "k5ton" is a 91.
I just used a sending unit for it.


The 1989 suburban's 41 gallon tank wouldn't fit in the k5ton, but I did just use the sending unit, it appeared to be recently replaced.
 
Frankenchevy

Frankenchevy

Proverbs 16:18
Joined
Jan 3, 2018
Posts
5,956
Reaction score
7,399
Location
USA
First Name
Jeremy
Truck Year
Square
Truck Model
CUCV
Engine Size
Small
@LateOnTheBrakes , if it’s for your pickup, you want a 20 gallon saddle tank from an 87 pickup. A burb/blazer tank sits between the frame rails and won’t fit a pickup directly. 87 is a SquareBody and tbi, hence has an in tank pump and is internally baffled. An 88+ pickup is not a SquareBody.
 
LateOnTheBrakes

LateOnTheBrakes

5.3-Swapped 86 CUCV
Joined
Feb 2, 2020
Posts
463
Reaction score
123
Location
Virginia
First Name
Joshua
Truck Year
1986
Truck Model
CUCV
Engine Size
5.3
Frankenchevy said:
@LateOnTheBrakes , if it’s for your pickup, you want a 20 gallon saddle tank from an 87 pickup. A burb/blazer tank sits between the frame rails and won’t fit a pickup directly. 87 is a SquareBody and tbi, hence has an in tank pump and is internally baffled. An 88+ pickup is not a SquareBody.
Click to expand...

Thanks.
 
C

Chris Edwards

Junior Member
Joined
Oct 17, 2017
Posts
1
Reaction score
0
Location
California
First Name
Chris
Truck Year
1974
Truck Model
C10
Engine Size
454
Came across this thread while researching LT swaps for my '77 C10. I previously did an LS3 swap but got the itch to do something different. Previously I was using a 87 hanger and tank and on the hanger I had compression fittings to convert them to AN. I was always weary about the compression fittings since they're on the top of the tank where I can't see them. I don't think they leaked but when I had the tank out for inspection during my L86 swap, I decided to install one of the Quantum drop-in hangers with AN fittings already on it. I'll be running n/a with E85 for the time being so their 340lph pump seemed perfect.

www.highflowfuel.com

QFS LSx/ LTx EFI Swap 6AN Fitting Fuel Pump Hanger and Sending Unit for 1973-1991 Square Body Pickups

SUPERIOR PERFORMANCE, FREE SHIPPING from the AUTHORITY on OEM replacement Fuel Pumps. SAVE on parts designed specifically for your vehicle. Shop QFS-H880
www.highflowfuel.com www.highflowfuel.com
 

Attachments

  • 279031856_524416965973431_8902875025589479532_n.jpg
    279031856_524416965973431_8902875025589479532_n.jpg
    136 KB · Views: 59
  • 279163501_1167129247372959_3328240039407040521_n.jpg
    279163501_1167129247372959_3328240039407040521_n.jpg
    106.5 KB · Views: 56
  • 279073700_2000130780184517_8808380488694057460_n.jpg
    279073700_2000130780184517_8808380488694057460_n.jpg
    90.4 KB · Views: 57
  • 279095940_3048926782103486_7882787921666105542_n.jpg
    279095940_3048926782103486_7882787921666105542_n.jpg
    147.1 KB · Views: 65
You must log in or register to reply here.

Similar threads

steve240
87 R10 TBI to EFI fuel line and tank upgrade
Replies
4
Views
2K
Ricko1966
R
F
Sniper EFI fuel pump
Replies
5
Views
784
JT58
J
dustin rhodes
In tank fuel pump [EP381] with carburetor - temporary setup
Replies
14
Views
1K
Rusty Nail
Rusty Nail
D
Fuel Pump Selection
Replies
5
Views
756
sidschev
sidschev
G
1989 v1500 burban steering pump bracket
Replies
0
Views
226
geauxnow
G

Latest posts

Forum statistics

Threads
42,061
Posts
908,227
Members
33,540
Latest member
irishgoodbye
Top