Hi all, I'm just starting out down this exciting road of playing with vehicle tunes. What I am wondering is if there is any real functionality difference between the different year models of E38's. I am aware the the OS's have boundaries and must be kept to particular year designations.

I have some VE and VF Commodore tune dumps and when looking in the EFI Live software it seems that most functions are available from the early 2008 ECU's.

What I am looking at specifically is whether or not a FPCM can be run with any E38 or whether you need a flex fuel vehicle ECU to do the trick. The tune items are there on a non-flex VE tune file to set min/max pump duty cycle and target fuel pressures and the like. Are these actually functional or just part of a standard set of adjustable parameters?

I am looking for an ECU and it will weigh heavily on my particular preference if the late model ECU is needed.

Thanks in advance guys and girls