Efi 351w Swap

nelzfoxes

5 Year Member
Aug 20, 2013
450
306
94
Alright. I am just trying to plan ahead. Who amongst us has successfully completed this swap? Chime in with any problems you ran into or parts you had to buy, etc. I ask because this is the next step for the Daddywagon. I just about completed the installation of an efi 302 from a 1986 mustang gt into a 1985 Ford LTD foxbody station wagon. I used Ford's M-12071-A50 harness. The computer is A9L. The meter is Pro Flow(?) calibrated to 24lb injectors. The car starts and runs. Now that I am so close to driving it the time has come to build and install a 351. Thoughts?
 
  • Sponsors(?)


nelzfoxes

5 Year Member
Aug 20, 2013
450
306
94
Is the 302 healthy? If so have you considered adding boost?
1986 is unique. You know the deal. More restrictive, forged flat tops, originally speed density. It's been sitting for years, truth be told. I just threw it in there. My intent was never to use the 302. My coworkers kept bugging me about the project and suggested I just get it running with the 302 since it was already in there. It ended up in there because it was attached to the k member with cobra brakes and the tremec 3550 that I wanted for the 351 swap. I should know more about the health of the motor in the coming weeks... when I drive it!
 

nelzfoxes

5 Year Member
Aug 20, 2013
450
306
94
F2D3B832-05D8-4113-9CD4-94544C040B46.jpeg
Pic of some 351 swap parts taken this past weekend.
Thread revival! I am gonna try to get the 351 in there in the coming weeks. The 302 runs... okay. It’s healthy enough that I can dump the clutch leaving a lot and get it sideways pretty easily. When I start my stock 93 though it’s obvious that the 86 motor needs a little work. The 351 I have is a lightning motor that I threw an H.O. cam into. It also has cobra roller rockers on the iron gt40’s. I will use this thread to show the 351 swap as I go. It won’t be pretty but I hope to just get it in there.
 
  • Like
Reactions: RaggedGT

nelzfoxes

5 Year Member
Aug 20, 2013
450
306
94
790AF785-3E01-47BD-A90F-087BDF417CF0.jpeg
8EBF88B5-6999-4EF0-8AE7-BDBBFF7BF8C3.jpeg
EF98E3CD-4EBC-4DCC-A9A7-8FC0FCE749EB.jpeg
44A76933-47A9-4295-8AE6-4C203806DE8F.jpeg
My plan is to just throw a 351w into the Daddywagon. I bought the engine a couple of years ago from a guy who built up Ford Lightnings. I can’t remember if it was his or an engine he got from someone else. I believe it was someone else’s because I recall him saying the previous owner installed the cobra rockers. Well I lifted the gt40 heads and the piston tops have quite a bit of black carbon buildup. The plugs and combustion chambers look ok! The intake valve on #1 cylinder is darker than the other 7. I ordered valve seals, but I am intent on not diassembling the engine any further. If I have to pull pistons then I will just have what I believe to be a better block machined and begin my long rod 351w build.
 

nelzfoxes

5 Year Member
Aug 20, 2013
450
306
94
I’m thinking about pouring coca cola into every cylinder and letting it sit. Can anyone recommend something else?
 

nelzfoxes

5 Year Member
Aug 20, 2013
450
306
94
5EF34850-90DA-49A2-A9AF-F4AC9485987B.jpeg
FE82E6E0-7EDD-481C-968F-E221DB330A3A.jpeg
55824466-0A52-4848-8438-C0855E1B8943.jpeg
46D1E260-023B-416D-970B-F8D0391675A6.jpeg
I just used dish detergent a golf head cleaning brush and a pocket screwdriver. Wuteva. Above is cylinders 4-1 top to bottom.
 

nelzfoxes

5 Year Member
Aug 20, 2013
450
306
94
D7920707-3C35-49F0-92CC-8A5721D5440E.jpeg
35CE0945-832E-4CA9-9202-AB59E2A4FEC7.jpeg
43269D60-1C91-4A5A-A780-0D3644C5566B.jpeg

The upside down photos of my very professional technique!

:nice:
 
Last edited by a moderator:
Thread starter Similar threads Forum Replies Date
nelzfoxes Engine Efi 351w Swap Fox Engine Swaparoo 28
5 1968 351w Efi Swap Mustang 1965 - 1973 Classic Mustangs -General/Talk- 1
98blackstallion SOLD Pro Products 351w Efi Swap Upper/lower Intake Engine and Power Adder 4
CobraII4me 351W Swap EFI to 4V Classic Mustang Specific Tech 6
CobraII4me 351W Swap EFI to 4V Other Classifieds 0
T 351w efi to carb swap.....need some help Fox 5.0 Mustang Tech 10
J Planning on full 351W EFI Swap, but don't even know where to start... 1994 - 1995 Specific Tech 25
ndfox92 Fox does anyone have a victor efi intake for a 351w they want to part with? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 0
R 351w with Efi into Foxbody with Efi Question Fox 5.0 Mustang Tech 14
M 800hp 408w Injector Help Fox 5.0 Mustang Tech 1
S Expired 351w Accel Billitech Efi/tfi Distributer #60204a Engine and Power Adder 0
91redFox 351w Efi & Roller Conversion 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 3
C SOLD 351w Efi Lower Intake W/ Bc Adapter And Mustang Efi Upper Intake. Engine and Power Adder 2
brianj5600 351w Efi Intake In A 67-68 Classic Mustang Specific Tech 19
B Help fouling plugs on a 351w efi Fox 5.0 Mustang Tech 1
vristang EFI Vic Jr for 9.5" 351w Engine and Power Adder 4
S 351W GT40 Lower & Cartech Upper, 351W EFI Distributor, Energy Poly Motor Mounts Engine and Power Adder Parts 2
Pokageek Edelbrock Victor EFI Upper AND lower! 351W Engine and Power Adder Parts 19
GT_green_GT 351w EFI intake Engine and Power Adder 1
GT_green_GT 351w EFI intake Engine and Power Adder Parts 4
firemansam 351W EFI question Classic Mustang Specific Tech 2
B 94 351w efi dist to 89 harness Fox 5.0 Mustang Tech 0
S Help me get my '69 running good! EFI/351w Classic Mustang Specific Tech 21
Travis77 351W efi intake choices for hood clearance Classic Mustang Specific Tech 10
h8my408 351w efi to carb distributor?? Fox 5.0 Mustang Tech 6
T spyder efi intake 351w Fox 5.0 Mustang Tech 4
jikelly Help Me Decide What To Do For EFI Setup On My 351W Classic Mustang Specific Tech 27
F swaping to 351W EFI 1994 - 1995 Specific Tech 5
C 94 351W EFI has anyone done this 1994 - 1995 Specific Tech 8
83Mustang427TT 351W victor JR. EFI intake help! Fox 5.0 Mustang Tech 3
83Mustang427TT 2.3 to 351W EFI wiring harness Help Fox 5.0 Mustang Tech 3
83Mustang427TT 2.3 to 351W EFI wiring harness Help Fox 5.0 Mustang Tech 0
P 351w efi valve covers? 1994 - 1995 Specific Tech 16
Katmandu 351W Carb'd -Vs- 302 Roller EFI ?? Fox 5.0 Mustang Tech 6
A 351W long block with 5.0 EFI? Fox 5.0 Mustang Tech 4
78pinto 351w EFI Pinto ready to fire up 1974 - 1978 Mustang II Talk & Tech 17
jikelly Carb on a 351W, should I switch to EFI or will that break my bank account? Fox 5.0 Mustang Tech 7
jikelly Anybody got a 351W with EFI? Classic Mustang Specific Tech 4
M EFI 351W won't rev past 6000 - HELP! Fox 5.0 Mustang Tech 9
5ohMustang Carb vs. EFI and more 351w Questions Fox 5.0 Mustang Tech 17
D EFI 351W and strokers! Please post #s Fox 5.0 Mustang Tech 2
S Engine 92 5.0 Carb to EFI Fox 5.0 Mustang Tech 4
7991LXnSHO Want to put EFI on a 6 Cyl. What System to get? Digital Self-tuning Forum 5
Old Catman EFI and megasquirt questions 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 14
Saine65 Best Efi Route 1965 - 1973 Classic Mustangs -General/Talk- 7
JimmyJamTheHamSlam Part Suggestions 1996 / 1998 4.6L DOHC Mashup Engine Rebuild SVT Tech Forum 0
88LX5.Oh Digital Tuning Holley EFI vs factory EEC Fox 5.0 Mustang Tech 33
Ultra90GT For Sale The Nitrous Works TNW efi plate Engine and Power Adder 3
N Advice on EFI tuning solution on a tiny budget Digital Self-tuning Forum 5
F Electrical Does EFI computer case need to grounded? Fox 5.0 Mustang Tech 22
Similar threads