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View Full Version : homemade fuel injection system what will I need?



65turbocoupe
04-30-2011, 09:32 PM
I have a 1965 mustang with an inline six engine. There are a few different choices out there for efi from aftermarket manufacturers such as weber but they cost a lot of money. So I was wondering if it would be possible to set up a homemade efi system and if so what parts would I need?

Six_Shooter
04-30-2011, 10:37 PM
Very possible.

I'm currently running a Delco (GM) ECM on my Nissan turbo I6 in my '73 Datsun 240Z.

The ECM itself is pretty dumb, all it needs to see are certain inputs, and it sends out the proper signals, to run the engine.

Check out http://www.eagle-mark.com/Forums/index.php for information and ideas. Many of us on that site are using GM ECMs on many different engines.

For basic systems, the ECM needs to see an RPM input of some sort, crank signal, or signal from an ICM (Ignition Control Module). A coolant temp sensor, Manifold Pressure Sensor, Throttle position sensor inputs. To control the injectors, IAC and timing. Some systems will use more inputs and outputs depending on usage, ans needs of that ECM, and firmware/bin loaded to that ECM.

65turbocoupe
05-01-2011, 09:18 AM
what year and model did you get the ecm from? And what other parts will I need to complete the swap?

1969CamaroRS
05-01-2011, 09:28 AM
You might check out Mega Squirt:
http://www.megasquirt.info/
http://www.msefi.com/index.php

Lot of threads on this board too about Mega Squirt.

Six_Shooter
05-01-2011, 09:46 AM
what year and model did you get the ecm from? And what other parts will I need to complete the swap?

My ECM is service 1227749, that was found in the turbo Sunbirds, Syclones and Typhoons, and some Quad 4 Berettas, and other L-bodies. The more common 1227730 could be used in place with the same bin file loaded, it just has a single injector river instead of the 2 that the 1227749 has, though this usually only makes a difference if you are using low impedance injectors. The 1227730 can be found in many cars from 1987 to 1994 in cars like Cavaliers, L-bodies, '90 to '93 F-bodies and many others. There are other service numbers that will work as well.

Take a look at the link I provided earlier, there are many wiring diagrams there, that will help you see what other parts will be needed. There are also some build threads that show what some people have used in EFI conversions.

The most difficult part you are going to have is that the intake is cast as part of the head, so making it run on MPFI, which is the best way to run a turbo engine, due to more easily controlled fuel distribution, will be difficult, if not impossible.

65turbocoupe
05-04-2011, 07:04 PM
So I've decided to go with the ems pro engine management system. Its based on a mega squirt design but just a little higher quality. It should be easy to set up and it has the boost control capability so its got everything I need. check it out with the link below. Let me know what you guys think.
http://www.diyautotune.com/catalog/emspro-engine-management-system-p-157.html

65turbocoupe
05-22-2011, 12:40 PM
What kind of throttle body are you guys using?

Six_Shooter
05-22-2011, 01:05 PM
I'm using a GM throttle boy from a 3400 V6.

65turbocoupe
05-22-2011, 03:41 PM
how did you mount the throttle body? Did you just use a custom adapter plate?

Six_Shooter
05-22-2011, 05:53 PM
how did you mount the throttle body? Did you just use a custom adapter plate?

Yeah, basically.

65turbocoupe
05-22-2011, 06:04 PM
alright cool thanks!