EDIT updated map software.

Yea, I know, but I'm always up for some sort of silliness. Part of a project it looking at a wide range of possibilities then picking a smooth path.

What's ironic is that the Sl is my first EFI car since I was buying / fixing and selling D-jetronic type 3 VWs in the early 80's!

Beckmann Technologies is probably one of the vendors.

Being able to reflash a ECU with a purchased file would be better than having to ship the ECU out every time.

EDIT

I came across software that looked at the bin and highlighted areas as maps. This was not a direct tuner software as it required the user to do the leg work. $ 500 US. http://www.batronix.com/shop/software/chip-tuner/chip-tuning.html

Too expensive to me would be more than ~ $ 2,500. US . If I went with a aftermarket ECU, rewired , made a system to translate CAN to and from the ECU to keep the trans happy / aftermarket trans controller, the total would likely be more. I have a state emission test to contend with also so the OBD 2 system needs to be up and running. ( I've got a theory to keep that end of things working. )

I've read some of your build, interesting stuff.

I've got a couple of goals. A low pressure turbo / supercharger for the SL320 to fill the low end power hole. ( Something like a Turbo Techniques system where 100 HP gain is easy.)

With information gained, a much stronger motor will be built for the other SL. The 2nd SL will be gutted , caged and primarily be used for track days. ( But will retain street legal status. )

I've built race cars before so the mechanical portion of the build is no big deal. I've got a good electronics background just not much time tuning a ECU.