Imagine you want to get more power from an engine but you have no idea how it works. You don't have books, you don't have the 'net, and you don't have someone else to ask. You don't know what a cam is, you've never heard of compression ratio, and the word piston has never been spoken near you. You have some tools but they may or may not fit the engine and they may or may not work together to disassemble the engine. You know someone somewhere has modified their engine so you have faith it can be done, but you have no idea what it took them to do it. All you know is if someone did their engine, then they or you should be able to modify yours. Doesn't seem like an easy job, does it?

Making a definition file and coming up with a disassembly is a huge undertaking. Around 2001 Lyndon Wester actually hired a guy to work full time on disassembling GM code for him because it takes so much effort and time to get it done. And that's with a known processor and known examples of code from similar computers. Working with an unknown ecm can take even longer. If it were simply a matter fo finding someone and handing over cash, everything would have been hacked a long time ago. What stops these efforts is the sheer time it takes to work out the details.

You can probably read the eprom in your ecm. But what you'll get won't look like anything you recognize. Will it be code? Or calibration data? Or both? You'll need to pass it throught a disassembler to know that. And in order to know what disassembler to use you'll want to know the type of processor used in the ecm. And then the disassembler may choke multiple times forcing you to make manual modifications and restart the process.

If the ecm is a chrysler design similar to some of the cars and trucks there are a few places to go. Like the GM stuff, you'd better be prepared to do some research first.
http://www.omniglht.com/cal.html
http://www.omniglht.com/sbec.html
http://www.turbo-mopar.com/forums/fo...?36-EFI-Tuning
http://www.turbo-mopar.com/forums/kn...BEC-Tuning-FAQ

I wish you guys would stop thinking everything needs to be SFI. The 86-87 GN is sfi and it uses an older "C3" ecm. But the Syclone is batch fire and can do everything the GN does.