EFI to Carb?
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Joined: Dec 2002
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From: Racine county, WI
EFI to Carb?
What I have is a 460 out of a 92 F250 that I want to put into my 77 F250. The 77 has a running 460 but it is in poor shape and I want to make it nice again. I have both motors for parts and I have all the computer stuff because the 92 is still running in my 92 F250. Should I convert the 77 to fuel injected (I would love to do that) or should I convert the 92 to a carburated engine? I've done plenty of engine swaps but more stock for stock stuff. What do you guys think I should do?
Elder User
Joined: Jan 2000
Posts: 966
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From: Crooked River Ranch, OR
EFI to Carb?
What are your trying to achieve, fuel mileage or performance? If your going for mileage stick with the late model injection. If your going for performance a carb and the older heads are the way to go. There are hardly any performance parts for EFI equipped 460's that will get you past the 300 HP mark. Deen
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Joined: Dec 2002
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From: Racine county, WI
EFI to Carb?
[updated:LAST EDITED ON 06-Dec-02 AT 07:34 AM (EST)]What I'm going for is no hassle reliability for the 77. The motor in the 77 uses a quart every 200 miles and I'm junking the 92. Just trying to work with what I have. I'm trying to redo the 77. I'd like to go fuel injected but I don't know how to make that work or if it's possible. The 92 is a complete donor truck for this.
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Joined: Jul 2002
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From: Paola, KS
EFI to Carb?
[updated:LAST EDITED ON 07-Dec-02 AT 02:12 AM (EST)]I would go the fuel injected route. I have heard, but not 100% sure of this that the fuel injected motors use a different intake manifold bolt pattern, which makes it impossible to install a 4bbl intake.
Someone let me know if this was a different motor I am thinking of.
EDIT
Okay I went and looked in the Edelbrock catalog and the Performer 4bbl intake says that it will not fit 1988 and later model 460.
Someone let me know if this was a different motor I am thinking of.
EDIT
Okay I went and looked in the Edelbrock catalog and the Performer 4bbl intake says that it will not fit 1988 and later model 460.
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Posting Guru
Joined: Dec 2002
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From: Racine county, WI
EFI to Carb?
That makes sence. So how could I make that Fuel injected motor work in the 77? How could I power the computer and make it operate correctly? I plan on installing the motor complete with wiring and collector pipe so I have all the sensors.
Junior User
Joined: May 2002
Posts: 56
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EFI to Carb?
The efi computer is pretty much self contained you'll need a good wiring diagram to figure out where everything goes though. Start at the 60 pin connector that connects to the computer and trace out where each wire goes. Most will go to an injector or sensor etc, some will need to go to ground, one will need power all the time, and a couple will need power at run and start. It's not as difficult as it might seem.
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More Turbo
Joined: Sep 2001
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From: Kelowna
EFI to Carb?
Dans right it is not a difficult as it seems you just need the right wiring diagrams and its almost plug and play. I did a few 5.0 conversions in my younger day. wiring that needs some work are for the fuel pump and check engine light the rest of it is almost self contained if you have a complete harness . Eric
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Joined: Dec 2001
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From: Louisville,Ky.
EFI to Carb?
You will need the low pressure pump that is in the tank, along with the high pressure pump that goes on the frame. I believe that the tanks may swap, if not the sending units may. You may also try to save all of the plastic fuel and vapor recovery lines off of the 92 and retro fit them to the 77. Just make sure that the ECM gets a good chassis ground or it won't last long.