bfloyd4445
Guru
If the 4-71 ECM isnt programmable you will just have to build your own ECM. Will take some knowledge of digital electronics and a scematic of the ECM. Its doable but is it worth the effort? Do you have a schematic of the ECM?I read a report about converting a Detroit 4-53 to electronic controll. They used the injectors and ECM from a 4-71 DDEC. At the end of it they hadnt found a way to raise the rpm limit in the ECM. The 4-53 does well at 2800 rpm, the 4-71 ECM was limited to 2100.