EFI,(my head is spinning, its starting to slow down.)

[stupidboy]

I've been kicking around the idea of efi in my bronco build, because I haven't had a carbed vehicle for 20 plus years and I like the smooth reliability of efi. I've been reading through some of the threads on this and they seam to be going all over the place, (to me at least), could someone who has successfully done this make me a list of what is needed and what year doner vehicle to use. Its going to be backed by a c4 trans and I will be needing help with the harness to get it running, I know all this has been asked by others but like I said reading other threads is making my head spin.?:?

 

[DirtDonk]

Nope. Can't be done. The only way you're going to get a single list, is to ask one specific person what they did and get every part exactly where they did.
Otherwise, you're just asking the same thing that led you to ask this same thing. Any "what do I need" questions, with regard to EFI, is going to depend on what the answerer did. And because there are so many options, you're just going to get your head spinning all over again.
I'm not trying to be a smart-ass, but it happens almost every time. There is so much to read, and so many different experiences (not to mention opinions too) that you can get just one list.
Unless you listen to just one person, who's successfully finished an install, and get EXACTLY the same parts they do, and start with the same base they have.
Things like: new or old electrical system (and what brand?), new or old accessory drive system (and what donor?), new or old block (and what donor?), what year donor vehicle (and what model?), car or truck (and what model and year?), 5.0 or 5.8 (and what application and year?), dual or single exhaust (and what size?), headers or manifolds (and Bronco-specific or not?), stock or aftermarket upgrades (and what brand and application?), drivers or passenger side throttle body (and what donor?), straight or angled throttle body flange on the plenum (and what donor?), power brakes or not (and what type?), and on and on...
Unless you buy a "Bronco specific EFI conversion kit", you might as well just get used to that spinning (and sinking) feeling.

And on that note... Good luck. Maybe someone will chime in to completely refute all that and you'll be good to go.
I can't wait to see that.

Paul

 

[stupidboy]

So you just hold 1 finger on top of my head and spin me from the shoulders;D

 

[stupidboy]

What if I try and ask just 1 person, who should it be? Bronco69, Bigmuddy, Spareparts, who?

 

[Viperwolf1]

Best way to do it is to find a complete donor first. Then take everything from that. Best single donors are '88-'93 mustang. Otherwise you'll be piecing it together and that will require some additional research.

 

[stupidboy]

Best way to do it is to find a complete donor first. Then take everything from that. Best single donors are '88-'93 mustang. Otherwise you'll be piecing it together and that will require some additional research.

So you have done this using this donor?

 

[DirtDonk]

Hah, at least with the finger on the head, you don't fall over as quickly.

Hmm, who to ask???????? I was thinnin' of that when I was writing. Problem is there are quite a few here who've done it and it's run perfectly. Maybe just pic the first person that answers you (with a "real" answer that is, and not the stuff I put forth) and go that route.
Or better yet maybe(?), would be to find your best donor, based on price and availability and condition, then ask whoever did it it with that exact setup?

I dunno. The one I just did, and the one I'm about to do, are all hybrid/morphmobile stuff. Probably no three components from the same application. Ok, so that's an exaggeration, but that's what it feels like sometimes.

Paul

 

[stupidboy]

I have a buddy that has alot of late 80's and early 90's F series trucks with efi but I take it that those are not very good donors, but I don't know why either.

 

[Viperwolf1]

So you have done this using this donor?

No, I kind of pieced it together. The mustang system is the basis for most Ford EFI aftermarket harnesses/conversions and has a lot of aftermarket support.

 

[stupidboy]

What if I say I'm going to use a 351w from early 70's will all the stuff from the stang bolt onto this? Some guys say use exploder as a donor, why? and what year is best? Tell me what donor to go look for to use on this 351, it will just be stock overhaul.

 

[DirtDonk]

Here we go again...
With head-spinning that is.

I have a buddy that has alot of late 80's and early 90's F series trucks with efi but I take it that those are not very good donors, but I don't know why either.

Good engines. Some roller, some not, some MAF, some SD, if I remember, but the upper manifold (plenum) is too tall for an easy swap into a Bronco. As always, it can be done, but it involves more parts (need to add 5.0 parts), more work, and more head-spinning.
Even without the finger.

What if I say I'm going to use a 351w from early 70's will all the stuff from the stang bolt onto this?

Nope. Not without adapters. You'd either have to source an EFI manifold specifically for a 351W, or find adapter plates to mate the Mustang's 302 manifold to the wider 351.
Most everything else bolts on, but the block is taller, and the manifolds wider, so anything that relies on those, is suspect at least.

Some guys say use exploder as a donor, why? and what year is best?

that's because a lot of development culminated in the Explorers. They were the last to see a 302 (no 351's in Explorers) so had a good combination of heads, manifolds, and especially the front accessory drive setup.

Tell me what donor to go look for to use on this 351, it will just be stock overhaul.

Probably two donors then, if you're stuck on a 351/5.8. Probably the latest '90's you can find, like a '95/'96 or so. Then a 5.0 upper and stuff from the Mustangs that Viper was talking about, along with the adapters (BC has them) for mating the 5.0 upper to the 5.8 lower.
Then the computer and harness from? I don't know. The others can tell you that.

Are all the answers starting to sound familiar yet?

Paul

 

[stupidboy]

Ok then maybe I'll scrap the 351 idea and just stick with the 5.0.

 

[hdmc]

i used everything off a 93 t-bird harness intakes fuel rails every thing came off the same car even the factory air box . i installed it in june been driving it every day with no problems

 

[Nightstick]

Have you looked at BC Broncos EFI section? They have articles about EFI that were published in Bronco Driver Mag that gives a complete shopping list of stuff that can be used. 351 isn't much different, and getting a lightning lower simplifies things. Trick flow makes a nice upper/lower combo too. Use the lightning lower, explorer upper, and mustang EEC and harness. There are EECs from many other vehicles that'll work as well, check out that article I mentioned.

 

[stupidboy]

Didn't know this but I'll check it out for sure, thanks

 

[gearhead74]

I believe the 5.0 HO and 351 have the same firing order. Vs a standard 5.0 EFI

 

[Viperwolf1]

I believe the 5.0 HO and 351 have the same firing order

Correct.

 

[stupidboy]

Correct.

Does this mean I need to be looking for an HO.

 

[needabronco]

www.fordfuelinjection.com

When your done with that come back and ask again. Seriously! No I'm not being a smart ass, there's a million ways to do this.

Dig around in your local yard and see what you can scrounge. Intakes are intakes, yes they must match, but you get the point... What your going to specifically need is the eec, maf, throttle body, and injecors off of the SAME car (not specifically, the same make, model, engine...). You should really just do it right and go with a mass air system. Buy your wiring harness and as many sensors new as you can afford.

The firing order thing isn't really a big deal. There are 1000's of Broncos running efi with mismatched firing order. Mine is and I've squeezed 15+MPG's out of mine several times, idles good, starts every time, blah blah blah. Don't buy into a cam swap solely for this reason...


Oh and good luck, it really is MUCH better than tinkering with a carb.

 

[stupidboy]

Have you looked at BC Broncos EFI section? They have articles about EFI that were published in Bronco Driver Mag that gives a complete shopping list of stuff that can be used. 351 isn't much different, and getting a lightning lower simplifies things. Trick flow makes a nice upper/lower combo too. Use the lightning lower, explorer upper, and mustang EEC and harness. There are EECs from many other vehicles that'll work as well, check out that article I mentioned.

Thanks Nightstick, for pointing this site out to me it has answered all my questions and now I know what to go shopping for!