1227165 ecu with custom code much better than stock ecu. (Page 1/26)
chetw77cruiser OCT 16, 09:57 PM
Here is the back story. Last week I installed a different ecu into an 86 SE V6 with a 4 speed. The ecu I used is the 1227165. This is the same ecu used in the 86-89 camero and corvette with tpi. That is where the similarities end. Here is the reasoning behind this project; the ecu fits in the stock location, a total of five wires need re-pinned to work with the modified code, and this ecu is relatively easy to find. Even better is that the memcal from the 7730/7727 will work in this computer, just with a different code in the chip.

Now this is where things start to get weird. The code I am using is highly modified and is not based on anything closely related to the 7165 or the 7730. The good thing is that this code can run a 4, 6, or 8 cylinder engine whether it uses a distributor or not (DIS), so all our bases are covered in the ignition department. Well, at least for anything other than LT1 or LSX based. This code is MAP based, not MAF. This includes from 1 bar to 3 bar sensors. Wideband control is implemented and with the right hardware in the ecu, auto learn of the fueling tables is a reality. Let me sum it up to this, this combo can do just about anything megasquirt can do and still retain onboard diagnostics and factory wiring.

So far I have used it fir a week and I can tell you that it is worth while for those who want to swap their ecus and have the ability to do some tuning. I so far have gone from 25 MPG to 32 for that same route. This includes going from the altitude of 4500 feet to 10k in less than 60 miles, and having to travel through Fort Collins traffic to boot. I usually never go below 65 mph, so yes I do speed a bit.

I will post more information if anyone is interested.

Chet W.
fieroguru OCT 16, 10:04 PM
I am curious as to what you are running and the mods done to the bin.

My old SBC swap ran the 7730 with the AUJP V4 custom bin that was developed by a few guys over on thirdgen.org... the features they added vs. the stock 8D configuration were quite impressive.
RWDPLZ OCT 16, 10:31 PM
Interested! Does it require a knock sensor like the 7730, or a digital EGR valve? Did Ryan do the programming?
chetw77cruiser OCT 16, 10:57 PM



quote
Originally posted by RWDPLZ:

Interested! Does it require a knock sensor like the 7730, or a digital EGR valve? Did Ryan do the programming?



A knock sensor is not required, but is recommended. Now, there area couple of options with the sensor. If using a memcal with a knock filter attached, as is in the 7730's case, the sensor is run like the 7730 with the signal being fed into a certain pin on the ecu. If using an external knock filter, like the 7747 or normal 7165 tpi installation, the signal is fed into a different pin on the ecu. Oh, and get this, the code has a knock count logging function.

This code is not originally setup to control an egr valve, but using one of the programmable output pins, egr is easily implemented. And a digital EGR valve is not needed. I am controlling my egr with this code.

To answer your last question, no, Ryan did not program this.

Chet W.
chetw77cruiser OCT 16, 11:18 PM
Another thread brought up a point about this ecu and code setup; no need for the cold start injector. I have the wiring disconnected on my engine and it starts as fast or faster than the the stock setup.

This setup idles better as well. I have set the idle down to 600 RPM just for the heck of it. Smooth with no hunting but when the cooling fan kicks in, it usually dies when set that low. I have it set for 800 with no problems so far. Now I just need to wire the fan to the ecu and let the ecu idle up before turning o the fan.
BlackGT Codde OCT 17, 12:10 AM
hmmmm, i currently have a 7165 ecm in my clutches... 1987 s10 2.5L duke!
you say that MEM/CAL will fit the 7730?
i am purchasing a 7730 ecm from a fellow forum member as well to do some programming and learning on so this will be a interesting find. id like to see where this heads! what kind of hardware did you use to reprogram your setup with? i was looking at the Moates apu1 programming package seems like a good deal.
as with all great threads...

PICS!!!
chetw77cruiser OCT 17, 07:35 AM
The memcal should fit the 7730. Are you going with the 7730 for a 2.5 or the 2.8?
I use the APU1 and the pocket programmer II for all my chip burning duties. As soon as I get som mods done to the ecu I will be able to tune directly through the aldl port and not have to use an emulator. Basically turns the ecu into a flash based computer.


quote
Originally posted by BlackGT Codde:

hmmmm, i currently have a 7165 ecm in my clutches... 1987 s10 2.5L duke!
you say that MEM/CAL will fit the 7730?
i am purchasing a 7730 ecm from a fellow forum member as well to do some programming and learning on so this will be a interesting find. id like to see where this heads! what kind of hardware did you use to reprogram your setup with? i was looking at the Moates apu1 programming package seems like a good deal.
as with all great threads...

PICS!!!
Blacktree OCT 17, 09:37 AM
I'm definitely interested. My Fiero currently has a 7730 ECM, but I am looking for something with wideband O2 support. And fuel trim auto-tuning would rock! Any additional information you can provide would be very appreciated.
chetw77cruiser OCT 17, 03:00 PM
I will try to get some pic's today or tomorrow of the computer in place.

To use the learn function the ecu needs to be modified and a nvram module installed. With this mod the aldl flash tuning and auto learn can be enabled, otherwise tuning is by burning multiple chips or with an emulator.
Alex4mula OCT 17, 08:47 PM
When I did my TPI I used the stock Fiero V6 harness with the 165 and the 5D BIN from the australian V8s (5.0l). I had to modify the tune a lot for the 5.7 plus my mods (I have all Moates stuff for onboard programing with emulator-Ostrich). But the install looks stock. Which other BIN you say will run a V8? I may be more inclined to change to an LSx ECM and get all the benefits of newer tecnology.

[This message has been edited by Alex4mula (edited 10-17-2011).]