Bosch ecu question

[LS]

I have idenitcal question on the Motronic DME 0261 200 088 
and KLR 0227 400 145 units from Porsche 951 (944T)

MCU??? markings DME:
iB 57312  8738

MCU??? markings KLR:
iB 57391  8721    

Anybody dissassembled Bosch ECU's?

Fooled around with prom tables (fuel timing boost)?

How about AFM to MAF replacement in software?

                  Thanks Len.