Some answers:
- I have read that the VEMs copes with 60-2 trigger wheel, but do I use the OEM VR sensor?
- Yes.
- As I said it has a single 3 x 2 wasted spark coilpack, can I keep this or would I need COP or other aftermarket coils like MSD/Accel?
- Keep the stock one. You can ignite them using the built-in IGBTs.
- Knock sencing, this is something that draws me to VEMs, can the 2 OEM sensors be used?
- Badly documented and complex, but works. I don't consider it a selling argument.
- A lot of stand alone ecu's require the use of a non stepper type throttle body, is this also the case with VEMs, and would I need to source the earlier type TB without this?
- It has built-in stepper driver, it should be compatible (!).
- The VR6 uses a MAF which I want to get rid of, what MAP sensor is recomended (drilling & tapping the manifold isnt a problem)?
- The MAP sensor is usually built-in, I highly recommend that. You have the option of 250, 300 or 400 kPa (absolute max pressure) which means 1.5, 2 or 3 bar boost max.
- Once its wired up, are there any VR6 base maps out there that could be used to get it running, or will autotune take care of this?
- It's not far from a BMW inline 6 cyl, so there are plenty to go around. You will want to get familiar with every setting, it's not really a plug'n'play system. VemsTune incorporates a VE tune function based on collecting real time data and doing statistical analysis, it is still in beta but works. See thread in 'Software' section.
- When I purchase the VEMs what would be the minimum, or recomendations I need for my application?
- Get all injector and ignition outputs even if you only use 6 injectors and 3 IGBTs (wasted spark), the other ones can serve useful purposes (relays, boost control, warning light, ..). The LCD is useful for diagnostics without a computer. Getting the built-in SD card logging is nice too for many applications.