Hope for GT40 EFI ECU

[kylem03]

In the limited searching I did the econoline ecu is definitely different hardware than the c1a1. My understanding is that the chip method with the c1a1 works on the gt40 because the tune itself is compatible with the hardware. I don't know that this would be the case with the econoline ecu. Get a c1a1 and grab a chip from one of the guys above.

[t.franscioni]

Yes ^^^ I would stick with what vanhandr is suggesting and get yourself a C1A1.

Well I think I was able to burn my 2002 GT40 tune using the moates gear Vanhandr suggested. Took me all day to figure out the software needed updated firmware from Moates and some trouble shooting technical support to figure out how to use it.... once I burned it I opened it on a free tuner software program I downloaded. Opened my GT40 tune file in a hex editor on the tuning software and a bunch of cryptic binary code popped up, so I think the burn worked. I put it onto a chip again like Vanhandr said, same chip he used F3V2. Now just gotta try it. Any guinea pigs out there with a C1A1???? Or if anyone wishes to purchase the Moates Jaybird and a F3V2 chip and would like to burn your own chip PM me with your email and I will send you the file I have and you can test it out yourself (cant figure out how to get it to attach here on this thread because its a .bin file). Again, I would test this myself but I fear I wont get to it for several months as my boat is torn apart.

[Fgroce]

From what I understand on most Ford trucks in the early 90's with the 302 and 351''s they were EFI not Sequential EFI. On a lot of the trucks they used Mass air flow sensors to calculate fuel rate. The boat is set up for speed density the same as a 86 GT Mustang. The throttle position sensor tells the computer how far open the throttle plate is and delivers the correct amount of fuel. I think the EFI in trucks and vans fires two injectors at one time. The one in the 86 Mustang was SEFI and it only had 19 lb injectors. The 351 in the 93 Cobra with the 351 has the 24 lb injectors and is SEFI but it is set up for Mass air flow. Maybe it is just a program change, but could be a hardware change. Hope this helps.

[DW SD]

I have a GT40 in my 2001 SAN. I'm glad to guinea pig. I'm in the San Diego area and am glad to share costs, etc. I saw Van's initial post on the Ford tuning board and contacted him with the goal of a backup.
I will email you t.franscioni

I'm grateful for those blazing the trail!
Thank you,

Doug

[t.franscioni]

This is off on a tangent perhaps but to touch on what your saying for my own understanding the GT40s EEC is set up to run based on speed density because there is obviously no MAF sensor which is what your saying I think and also does not run SEFI as there is only 4 (fuel injector) wires on the EEC side of the 60pin connector so each of the 4 wires must be running 2 of the 8 injectors during any given pulse signal sent by the EEC? So the GT40 EEC is based off speed density and EFI not SEFI? Im wanting to confirm this becasue another option that might be for tinker type would be a full blown after market EEC and tuning it from scratch. Megasquirt makes a ford EEC-IV 60 pin EEC that with some self education and desire could be set up to run on the stock GT40 engine harness and tuned to run these GT40s. Much more work than chip burning but my buddy has a megasquirt he tuned from scratch to run a highly modified turbo BMW engine he built from parts and the megasquirt is really cool because it allows for data logging which besides being cool provides for easy trouble shooting in the event of many engine issues. Just hook up your laptop and see what went wrong and when...

[DW SD]

Yes, in reading on the Ford eec tuning forum, I remember the GT40 uses batch pulsed injectors rather than sequential, so either two at a time or 8 at a time are fired. It is for that reason we are targeting a 4-cylinder computer rather than all 8 being individually controlled. If we go to Megasquirt, I believe it could be advantageous to switch to sequential injection, but then a new harness would be necessary to provide individual connectors to each injector.

I'll be buying a used ECM for testing purposes shortly.
Cheers,

Doug

[DW SD]

Also, does any Ford ECM with part # #F1ZF-12A650-AB

Work? or do I only target one C1A1 designation, too?

[t.franscioni]

I'd look for the same one Vanhandr and Rusty used. So that part number in the C1A1.

[Blamey]

Lewy over at CCF has installed a megasquirt on his GT40. Here is a link to a post where he mentions it.

I don't know more, so not sure if he still has it on there or how it's working longer term.


I could be wrong but I think the GT40 fires 1 bank (4 injectors) at a time. It's in the service manual some where as I recall reading about it in detail.

[Blamey]

Here is the part from the manual describing the injector sequence. Not quite like I remembered.

[Fgroce]

Hi I called Cardone, today and talked to a service representative. They do not have that part number on file, but they said all you have to do is go to a Cardone dealer, with your broken ECM and they will send it in for repair. Once it gets to the Philadelphia repair center, it is about a five day turn around. When the unit is evaluated and repaired they will assign a part number to it. Then it will be able to be purchased. They would not quote a price without a part number, and they will not have a part number until the first one is evaluated and repaired. Hope this helps

[t.franscioni]

[QUOTE=Blamey;n520620]Lewy over at CCF has installed a megasquirt on his GT40. Here is a link to a post where he mentions it.

Cool. Might try to reach out to him. Curious about how he tuned it, with or without use of a wideband sensor or if maybe he has the file and could share it.

[Fgroce]

Personally I would keep it as stock as possible, the original ECM's have a very good track record for reliability. I know when I hot rod an engine there are always trade offs for reliability. When I go to the lake I want my boat to run, lake time is to valuable to waste working on a boat.

[t.franscioni]

I totally agree... I highly dought I'm going to tune a GT40 in my garage better than PCM did. Just a for fun project to tinker around with, my stock ECU is fine. Or at least it was before I started plugging adapters and chips into it.

[Rusty Barras]

If Rusty confirms this 300M works on the C1A1 donor eec then I'm sure anyone could run it on there GT40 as long as it's TFI ignition and multi port injected. I think some older GT40 had different ignition and throttle body injection systems? Or were those called "Pro Boss" engines and the GT40 was what they called the newer TFI and multi port injected Ford marine engines?

sorry, i stopped getting notifications on this thread for some reason... i'll try it. I'd want my chip to be updated to the latest tune if possible. I'll PM you.