Factory Ford 351W EFI Questions...

[ebroncoman]

Ok, time for me to pick your technical little brains for a while.

Who has installed a complete factory EFI motor in their bronc'?? I'm going to use something from the 90's, the newest that I can find. Besides the 10 foot tall upper intake, what kind of problems am I going to run into? Is there a speed sensor or anything? I'll use the factory computer, sensors and MAF, or MAP (whatever they use). I just want to know what I have to do to make the EFI engine a stand alone system. This thing is going to be a crawler, so the only perfomance mods I'll do will be mustang headers and open element air filter. Any help will sure make my research and install easier!!! Thanks, -E

 

[krisbassett]

I installed a 5.8L out of a f-250 into my bronc. I used nothing but the factory wiring. I currently am not using the VSS because I am running a standard. I also retained the use of the factory manifold because it makes awesome bottom end but I did have to put a large hood scoop on but I think it looks cool. I can post a pic if you like. If you have any spec questions feel free to ask and I will see what I can remember. Oh ya as far as the other sensors I am running just about everything just left out a couple that had to do with the fuel purge canister.

 

[krisbassett]

 

[ebroncoman]

I installed a 5.8L out of a f-250 into my bronc. I used nothing but the factory wiring. I currently am not using the VSS because I am running a standard. I also retained the use of the factory manifold because it makes awesome bottom end but I did have to put a large hood scoop on but I think it looks cool. I can post a pic if you like. If you have any spec questions feel free to ask and I will see what I can remember. Oh ya as far as the other sensors I am running just about everything just left out a couple that had to do with the fuel purge canister.

Hey Chris, that's cool as hell! I don't know what I'll do about a hood, but I'm not worried about that. What are the best years for the swap? Any years to steer clear of? Thx, -E

 

[krisbassett]

I used a 1990 the earlier years have less wiring but if I did it again I would try and find a later one that has mass air. although mine runs great and I've been told by my local ford mech that I wouldn't notice enough diff to make it worth the cost to add it now. I will find my dyno sheets and post up numbers for you.

 

[SaddleUp]

I've done them both ways. I.E. Using all factory EFI from the truck and also converting to the Mustang MAF system. The advantage to the Mustang system is that it is sequential instead of banked. In reality this will only make a big difference at higher RPM's. It also idles slightly better as well but it isn't significant. Other than the hood and small differences in the harness it is pretty much the same as the popular Mustang setup. (You just need to follow the diagrams for the truck ECM when wiring it in if you choose to use that one) A search here for EFI swap will turn up details to cover pretty much everything.

Personally I run a 96 F350 5.8 including everything that was connected to the motor except the injector harness. My harness and ECM are the Mustang MAF harness. Look for a 94 to 96 Truck 5.8 as they are roller motors whereas earlier ones are just roller ready. My buildup thread (Link below) has some pics of both the motor and what I did to the hood to make it fit.

 

[ebroncoman]

Hey guys, thanks for the input... This will make my Puul-N-Save shopping a lot easier!;D

 

[krisbassett]

I also know if you could find a 1995 f-150 with the 5.0 they have mass air and the engine controls will most likely work fine on your 351.

 

[SaddleUp]

I also know if you could find a 1995 f-150 with the 5.0 they have mass air and the engine controls will most likely work fine on your 351.

I'm not sure but I think that one is banked rather than sequential. Either way the Mustang setup would work better. If it's banked then the Mustang setup has the advantage of being sequential. If it's a sequential system then the injectors will have a different firing order than the 5.8. (Might as well be banked)

 

[krisbassett]

I was talking to ford motorsports and they told my to use the bank harness if I bought the mass air conv because the seq makes no dif at all?? This is coming from svo them selfs so I don't know?

 

[SaddleUp]

I was talking to ford motorsports and they told my to use the bank harness if I bought the mass air conv because the seq makes no dif at all?? This is coming from svo them selfs so I don't know?

There is a difference at an idle for sure. Banked tends to idle a bit on the rough side compared to the sequential. It isn't enough for me to change the system on my F250 from stock but nevertheless it is different. (We've run my brothers 5.8 with all 3 systems and there was a marked improvement in idle quality when we went from banked to seq., very little change between SD and MAF) Sequential aso makes a difference at higher RPM's but that isn't a big concern running the truck motors. Not that it is a big deal though. Any of them will run and idle better than a carb will and sticking to a completely stock setup off one vehicle is going to be the easiest to get going. He can always come back later and swap the harness and ecm to upgrade.

 

[krisbassett]

I have not descided what I'm going to do woth mine yet I have been looking at the spyder intake also has anyone used it yet? Mine runs good enough with sd that I will prob leave it alone unless I descide to put a kenn bell on then I will upgrade. nice talkin with ya

 

[SaddleUp]

I have not descided what I'm going to do woth mine yet I have been looking at the spyder intake also has anyone used it yet? Mine runs good enough with sd that I will prob leave it alone unless I descide to put a kenn bell on then I will upgrade. nice talkin with ya

From what I recall that is a higher rpm intake. Most of the aftermarket intakes suffer in the bottom end compared to the stock truck intake. The Edelbrock Performer fairs pretty well which is what I've thought about. I'm in the same situation though. I.E. Why mess with a good thing. It runs out really well and climbs like a goat as is so I can't see much reason to start messing with it.

ebroncoman, Check out the tech. article on the EFI swap in the tech. section on the left and read up on the stuff at http://fordfuelinjection.com. Also pick up the Probst Ford EFI book (It has both the diagrams your going to need and a good description of all of the system components plus troubleshooting stuff that will be handy when you run into problems). Between those 3 sources plus all the stuff posted in previous threads here you should find everything you need to get it set up once you have the motor. Everything is going to lean toward describing the Mustang setup but they are really so close to each other that the biggest difference will be what page you turn to in the book for the wiring diagram.

 

[ebroncoman]

Saddleup, I'll check that site out right now!! I'm not too worried about top end and high RPMs, as long as I have gobs of low end tourque, I'll be happy. My '71 w/a carburated 351w kicks ass. I just want the reliability and off camber operation of fuel injection.

 

[krisbassett]

this was in issue with mine. Even with the big scoop the hood would not close over the egr. So I built this drop tube for it. Hope this helps.

 

[SaddleUp]

I just knocked the sheetmetal off and flipped my EGR valve upside down. (Flipping it upside down blocks the intake port)