from Carb or CFI to EFI...?

[Mr. Land Yacht]

let's say I bought a 81-85 MGM with Carb or CFI as a DD and wanted to make it a EFI 302 instead.

what would I need besides the Intake manifold, ECU and Injectors?
maybe a different fuel pump if it had a Carb?

I just want to know if it would be worth the time/effort.

thanx for any info.

-Colin

[Mr. Land Yacht]

yea, I figured going from CFI to a carb would be easy...but mpg wouldn't be quite as nice I imagine.

[88Vic]

Oops, deleted what I said by accident :p

I was kinda cornfused on what you're asking. Are you about to buy said 81-85 MGM? And are you set on having it be EFI, whether it's carb or CFI?

[Archangel]

The harness that connects the ECM to the engine is supposed to be self-contained, however Ford Racing makes a harness (actually two harnesses IIRC, and you need both) for such applications as well.

[P72Ford]

Ford Racing makes a harness (actually two harnesses IIRC, and you need both) for such applications as well.

FRPP PN: M-12071-C302

Not sure about the secondary harness, I can't find it in my catalog.

Possibly M-12071-K302

C302 is like 200+, and K302 is like 100. Painless makes one thats nearly 500. I'd try and use a factory harness myself.

[Archangel]

Well one harness is the one that's on the engine itself, brings input from all the sensors to the two fat connectors with like 1500 pins in them. The other harness connects said two fatties to the ECM, and I think also provides power to the ECM.

[P72Ford]

Well one harness is the one that's on the engine itself, brings input from all the sensors to the two fat connectors with like 1500 pins in them. The other harness connects said two fatties to the ECM, and I think also provides power to the ECM.

Well then K302 is wrong. Thats a harness with certain sensors and such attached. C302 actually goes on the engine.

[Archangel]

Don't quote on that stuff tho, tis just something I remember seeing in the FRPP online catalog an year or so ago - not accurate info by no means.

[P72Ford]

Don't quote on that stuff tho, tis just something I remember seeing in the FRPP online catalog an year or so ago - not accurate info by no means.

I have the 06 catalog too; it shows the C302, and also the K 302 with sensors, solenoids, etc...

[1987cp]

You do still have the wiring you took off MAGNA, don't you? No reason you can't adapt that to a SEFI conversion on an older box-body.

I *think* CFI used two fuel pumps, a low-pressure in-tank pump and a high-pressure inline. That'd be easy to adapt. Carbureted systems just had a siphon tube going into the tank; if the car was carbureted and the tank was good, I'd suggest just jacking MAGNA in the air and swapping tanks between the two cars.

[Mr. Land Yacht]

no, I dont still got my wiring....wouldn't have dreamed that I would ever need that 40lbs of wiring.

I was kinda cornfused on what you're asking. Are you about to buy said 81-85 MGM? And are you set on having it be EFI, whether it's carb or CFI?

no, I haven't....but I was thinking that maybe in the future if I get a DD, I should give myself some more options if I were to find something like that for a good price.
since I would likely swap an HO intake to any box I get anyway....I would be halfway there.

[Rojas109]

no, I dont still got my wiring....wouldn't have dreamed that I would ever need that 40lbs of wiring.


no, I haven't....but I was thinking that maybe in the future if I get a DD, I should give myself some more options if I were to find something like that for a good price.
since I would likely swap an HO intake to any box I get anyway....I would be halfway there.

lol, you want it back?

[85crownHPP]

Only you can say if its worth the time and effort... carb to sefi would be a lot more involved than CFI to sefi.

You will need all the wiring and vacuum lines that make the engine run, and swap over everything plugged into them if they arent there already. If you start with CFI, you will already have a TFI distributor, MAP sensor, TPS, EGR valve...
I might be doing this to the 85

[1987cp]

no, I dont still got my wiring....wouldn't have dreamed that I would ever need that 40lbs of wiring.

*shrugs* Oh well, as you'll be learning this winter, a carb can still be quite reliable as an all-season solution, and especially if you get a smaller 500cfm four-barrel for the DD, you can get good fuel economy as well. :p

[gadget73]

Probably about the same amount of work either way, though it will depend on what you're starting with. I do not like carbs all that much, so I'm all in favor of an EFI swap, however it would be more work on a 79-82 because of the single fuel line. Absolutely no idea about an 83, since thats EEC III. 84-85, no big deal. Basically you'd need panther fuel rails, the panther wiring harness, and I would strongly suggest the evtm for both cars, but honestly I really do no think its going to be the end of the world. Unfortunately to my knowledge, nobody has done this yet, and I haven't had anyone volunteer a car and a hand for me to experiment with, so details are a little sketchy. I have a pretty good idea of what will be involved, but there are always small details that can't be guessed at.