EFI to CARB
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EFI to CARB
I need some info on converting a '85 f-150 efi/302 to a carburetor. Stuff like fuel pressure and wiring is the major question. Would a dura spark module plug in? If not how do I wire it up? I have a edelbrock performer manifold this should bolt in right? Any other wiring tip/tricks are helpful. Thanks!!
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From: saramento usa
EFI to CARB
The dura spark should work, but if you are purchasing new, go with an MSD 6A ignition. It'll give you a little boost. I run my 351W with the perfomer manifold and an Edelbrock 600 cfm, w/electric choke; works great. Your manifold should bolt in as long as it is for the 302.
Slik
Slik
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From: saramento usa
EFI to CARB
Oh, the fuel pressure is pretty low on a carbed engine; can't remember how much, but I'll look it up and get back to you; seems like only about 9-12 lbs or something like that. Also, do you need to meet street legal requirements? You may need to purchase an EGR plate and the EGR valve; you also need to run a line from a carb can to the carb vent tube (don't know how this works on EFI); connection to between your PCV and carb; the other vacuum ports on the carb are for the distributor and maybe a connection to the thermostat housing that senses water temp and vacuum to work with the EGR. Anyway, maybe I'll trade you mine; I want to switch mine to EFI!!!
Slik
Slik
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EFI to CARB
>maybe I'll trade you mine; I
>want to switch mine to EFI!!!
Great! We are thinking about selling it anyway. I'm glad to hear it's a plug in type deal, does the wireing have to be from a 80's truck?
It has to be from a 302/351w right?
There is a fuel pump under the cab, but is there one in the tank too?
Will the pump work without the computer?
Thanks for the help!!!
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From: Durham
EFI to CARB
Which wiring? the dura-spark? or computer?(I know nothing!!) Somebody else needs to answer the question on the computer harness stuff, I really don't know!
Oooh, good point on the fuel pump! You may only need an in line regulator to reduce the pressure and I don't think the fuel pump is tied into the computer for the carbed engine. Man, your heading for waters that I've never even wanted to think about!! You would think if I could convert mine to FI with the purchase of a computer, wiring harness and a few injectors, then you should be able to undo yours!! I have a valve in front of my two tanks (close to under the cab) and a mechanical fuel pump on the front of the motor, but I do not believe I have any in-tank pumps.
'82 F150 w/351W (orig 300 I6)
Steve
Oooh, good point on the fuel pump! You may only need an in line regulator to reduce the pressure and I don't think the fuel pump is tied into the computer for the carbed engine. Man, your heading for waters that I've never even wanted to think about!! You would think if I could convert mine to FI with the purchase of a computer, wiring harness and a few injectors, then you should be able to undo yours!! I have a valve in front of my two tanks (close to under the cab) and a mechanical fuel pump on the front of the motor, but I do not believe I have any in-tank pumps.
'82 F150 w/351W (orig 300 I6)
Steve
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EFI to CARB
The Duraspark II system with six-wire harness will wire in nicely. Use a matching Ford distributor and you should have no problems. Do not use the electric pump on the chassis rail. It is wired into the computer and also puts out 45 psi. You only want about 7 psi on a carb. The in-tank pump (if equiped) may be OK but I don't know for sure; I would be reluctant to use it. Best thing to do may be to put on an in-line electric pump designed for a carb. If you had the parts and EVERYTHING WAS COMPATIBLE (front cover, eccentric, etc.) a mechanical pump might be a consideration. Interesting project - Good Luck.
FL Panhandle
FL Panhandle
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EFI to CARB
>The Duraspark II system with six-wire harness
>will wire in nicely
Is this the Duraspark II control module with a BLUE strain relief bushing, one 4-pin connector, and one 2-pin connector I saw on the Ford V8 workshop page? Looks like I need a different block, the one I have has no way to put on a mechanical pump. Thanks for all the help!!
>will wire in nicely
Is this the Duraspark II control module with a BLUE strain relief bushing, one 4-pin connector, and one 2-pin connector I saw on the Ford V8 workshop page? Looks like I need a different block, the one I have has no way to put on a mechanical pump. Thanks for all the help!!
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From: Durham
EFI to CARB
Don't throw the block away! If it is a serpentine belt, then you need an electric fuel pump for carbs. The mechanical pumps were usually used when you had a multiple v-belt setup on the front end.
'82 F150 w/351W (orig 300 I6)
Steve
'82 F150 w/351W (orig 300 I6)
Steve
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EFI to CARB
>>The Duraspark II system with six-wire harness
>>will wire in nicely
>Is this the Duraspark II control module
>with a BLUE strain relief bushing,
>one 4-pin connector, and one 2-pin
>connector I saw on the Ford
>V8 workshop page? Looks like I
>need a different block, the one
>I have has no way to
>put on a mechanical pump. Thanks
>for all the help!!
That's the one. Great schemetic and info on the web page mentioned in the Big Bronco section - same subject. I put the Duraspark system into a 64 Galaxie with a 351W. Worked great !!
>>will wire in nicely
>Is this the Duraspark II control module
>with a BLUE strain relief bushing,
>one 4-pin connector, and one 2-pin
>connector I saw on the Ford
>V8 workshop page? Looks like I
>need a different block, the one
>I have has no way to
>put on a mechanical pump. Thanks
>for all the help!!
That's the one. Great schemetic and info on the web page mentioned in the Big Bronco section - same subject. I put the Duraspark system into a 64 Galaxie with a 351W. Worked great !!
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EFI to CARB
>Don't throw the block away! If
>it is a serpentine belt, then
>you need an electric fuel pump
>for carbs. The mechanical pumps
>were usually used when you had
>a multiple v-belt setup on the
>front end.
>'82 F150 w/351W (orig 300 I6) Steve
>
The engine has the v-belt set up. Where the mechanical pump would be, there are two tapped holes. But where the pump arm would go into the block, the hole doesn't go all the way through. I know I could buy a electric pump for a carb, but I want to keep things simple. I think I have everything figured out. Shouldn't be too hard, just expensive. If I have any more questions you guys will be the first to know, thanks alot!!
>it is a serpentine belt, then
>you need an electric fuel pump
>for carbs. The mechanical pumps
>were usually used when you had
>a multiple v-belt setup on the
>front end.
>'82 F150 w/351W (orig 300 I6) Steve
>
The engine has the v-belt set up. Where the mechanical pump would be, there are two tapped holes. But where the pump arm would go into the block, the hole doesn't go all the way through. I know I could buy a electric pump for a carb, but I want to keep things simple. I think I have everything figured out. Shouldn't be too hard, just expensive. If I have any more questions you guys will be the first to know, thanks alot!!
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From: Poynette Wisconsin
EFI to CARB
Could I just swap the front cover and fuel pump ecentric(spelling?) from a carbed 302 onto my EFI 302 so I can use a mech. fuel pump? Seems like that could work, any thoughts? Did the dual tank trucks have in-tank pumps? If the front cover swap will work I can get this project going and finished in the next couple of weeks.
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EFI to CARB
Quite the problem you have gotten your self into ollie, However so have I. I've tried to do this myself except on a 1986 Bronco. I have transmission electric OD to worry about as well as the distributor gear has to match. Neither fuel pumps will work. If you have an In tank pump and a rail mounted hi pressure pump you need to by pass them put a new pick-up in your tank or get a pre 84 tank and put on it and run an eletric fuel pump. Good Luck Jeff
If anybody has any constructive help for my situation I would appreciate it.
If anybody has any constructive help for my situation I would appreciate it.
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