There is a lot of stuff required to "piece together" your own custom efi system, which is exactly why the pre-built kit systems are so popular because they save you all that trouble. Fortunately there is a lot of info on the web to help you, just do some searches like "how to convert to efi" and you will find many articles such as these:

Fuel Injection Conversion Part 1

Fuel Injection Conversion Part 2

Fuel Injection Conversion Part 3

I didn't read those particular articles but I'm just listing them as examples of what you can find when you search. There are many others, you just have to do some searches and you will find the info is out there.

What size injectors are you going to use?

I would suggest these injectors. they are $41 each on Rock Auto

I used them on my MS3X 440. They are 60lb-Hr out of the 2013 Ford Mustang Cobra.



I then purchased hats to make them full length to fit on my Edelbrock ProFlo-XT Manifold!

Super race car lookin!




Here is a link to the hats:
http://www.t1racedevelopment.com/categor...-injectors.html

If you want quality injectors I believe Bosch, Siemens etc. would be a safe bet.
Myself I'm using 82 lbs Siemens injectors in my 512, but I'm running E85 so I need a little more than on gasoline.

Edelbrock, Holley, Fast, etc do NOT build their own injectors. They simply buy them from Bosch, Siemens, etc. So it doesn't matter where you buy the injectors.

As far as choosing your injections, just size them to your max HP you can make. Figure it a .5 BSFC and figure a 70% duty cycle at max.

I personally wouldn't use the Ford injector or any factory injector for that matter.........the simple reason is the connector. If you use a standard aftermarket injector, Bosch, Siemens, etc, the connectors will match your harness. The less you have to modify the harness you buy, the better off you will be. Plus I don't care for those hats on the top. Why add an extra place to have a leak.

As for which ECU to choose..........they mostly do the same thing and that is what YOU TELL them to do. So look at some software and see what YOU are most comfortable with. I have personally tuned Holley, Edelbrock, FAST, BS3, Haltech, Fuel-Tech, Motec and a couple others. Of that list, the Edelbrock would be my LAST choice and I think the Holley is the most user friendly, but others will like different ones

Monte

I think you will be happy with either.

You will need to buy a harness at the same time you get the ECU. Most people get the universal but you can build one from scratch.

Make sure you get the wide band 02 and harness. Or call Monty and give him your specs and he can hook u up.

Edelbrock, Holley, Fast, etc do NOT build their own injectors. They simply buy them from Bosch, Siemens, etc. So it doesn't matter where you buy the injectors.

As far as choosing your injections, just size them to your max HP you can make. Figure it a .5 BSFC and figure a 70% duty cycle at max.

I personally wouldn't use the Ford injector or any factory injector for that matter.........the simple reason is the connector. If you use a standard aftermarket injector, Bosch, Siemens, etc, the connectors will match your harness. The less you have to modify the harness you buy, the better off you will be. Plus I don't care for those hats on the top. Why add an extra place to have a leak.

As for which ECU to choose..........they mostly do the same thing and that is what YOU TELL them to do. So look at some software and see what YOU are most comfortable with. I have personally tuned Holley, Edelbrock, FAST, BS3, Haltech, Fuel-Tech, Motec and a couple others. Of that list, the Edelbrock would be my LAST choice and I think the Holley is the most user friendly, but others will like different ones

Monte

What???

Where is the confusion? You buy an aftermarket generic harness, it will NOT have connectors that fit those Ford injector plugs, unless the company offers that in an injector harness. Some do, some don't. And are those injectors low or high impedance. Does the ECU you are interested in drive either? Again, some do, some don't.

To the OP........it is pretty obvious that you are not SURE what you need. I suggest you contact somebody such as myself or Mopar Rich who does this stuff a LOT and let them put you a package together that will WORK. For the most part, users are going to suggest what THEY use. That may be good and it may not.

This is SIMPLE stuff really. You pick an ECU and harness that you want to use and go with that. The rest of the ancillary pieces don't really matter. We/Holley for example, have our boxes configured to work with both GM and Ford factory TPS, coolant, IAC, IAT, etc sensors. Some may not and that requires custom configuration or their specific sensors. Our box also controls the fuel pump, fans, water pump........basically whatever you want it to.......some don't. Ours has a full function data logger........some don't. We offer a full size monitor dash......some don't. Ours has a self learn system......some don't. Ours can control DBW throttle bodies and electronic transmissions.......some don't...........Ours will drive "smart coils" if you want to loose the dist and ignition box.......some don't........Do your research

injectors are sized from as low as 20lb/hr to over 500lb/hr.....you buy the injector size you NEED........makes no difference from who

Monte