switch motor
switching motors...help!
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switching motors...help!
hello
i have a 1992 f-150 that has a bad motor and a 1978 f-150 that has a good motor. i was wondering if anyone knew if it was possible to switch those motors out? i dont think it would be a problem but i knew the wiring would be a pain and the 92 is fuel injected and the other ones not, obviously; but i think that wouldnt be too much of a problem. but anyways..what do u guys think or what? because i really dont know
i have a 1992 f-150 that has a bad motor and a 1978 f-150 that has a good motor. i was wondering if anyone knew if it was possible to switch those motors out? i dont think it would be a problem but i knew the wiring would be a pain and the 92 is fuel injected and the other ones not, obviously; but i think that wouldnt be too much of a problem. but anyways..what do u guys think or what? because i really dont know
Post Fiend
Joined: Mar 2002
Posts: 19,402
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From: Bonita Springs FL
Are you wanting to transplant the whole EFI system or wanting to just put the carbed motor in the truck? In some states this is a no-no emissions wise.
It can be done, but it will be an enormous pain. You might consider heading over to the junkyard and picking up a motor there for $400 or so.
It can be done, but it will be an enormous pain. You might consider heading over to the junkyard and picking up a motor there for $400 or so.
Lead Driver
Joined: Nov 2002
Posts: 9,558
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From: Concord, NC
Do you want to swap the EFI to the older engine in the newer truck or run it on carb in the newer truck?
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Lead Driver
Joined: Nov 2002
Posts: 9,558
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From: Concord, NC
I'd think that it would be just as easy, if not easier to just swap the EFI to the older engine as it goes into the newer truck than it would be to convert the 92 to run on a carburetor. That's just my opinion though....
Elder User
Joined: Mar 2006
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I agree with Eric. It would be much easier to keep the truck EFI. Just put the EFI manifold on the carb motor and drop it in and you're done. If you go with the carb in the EFI truck, you have a lot of changes to make. I can think of a couple big ones: the carb wants 5-9 psi fuel pressure, you have 40 lbs with the efi (new fuel pumps or regulator w/ return); your trans, if an E4OD, will not shift without input from the EFI sensors unless you buy an expensive tranny controller.
Lead Driver
Joined: Nov 2002
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From: Concord, NC
If it's a 351M, you are going to have more issues than just converting to carb (need different transmission, different engine mounts, accessory brackets, etc). The 302 intake won't work on either 351M or 351W.
Post Fiend
Joined: Mar 2002
Posts: 19,402
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From: Bonita Springs FL
Yeah, all this was under the assumption that you were switching out motors that are the same.
I am not a 70's truck expert, but I don't think the 351W was available from the factory in a truck. I think they were car-only engines back then. Doesn't mean someone didn't put one in, though.
If it is a 351M (likely) then you have a significantly more complex project.
I am not a 70's truck expert, but I don't think the 351W was available from the factory in a truck. I think they were car-only engines back then. Doesn't mean someone didn't put one in, though.
If it is a 351M (likely) then you have a significantly more complex project.