Several people asked me to share my impressions and experiences with the VEMS setup once I got it installed.
I have been running it for a few weeks now, and all is good.
Installation is very easy, because of course it is plug-and-play
Hardest part was adding the 2-wire ISV to my early car (which has no such provisions).
I mounted the IAT sensor on the top half of the factory airbox, and put together a "delete pipe" to connect the airbox straight to the J-boot since the AFM is no longer needed.
Everything else plugged in to place. Took a little bit of tweaking on the initial setup file but once the car started, it runs great. VEMS has a "fuel pump prime" option which runs the pump for half a second or so when you first key-on..I like that, makes the car start faster after sitting for a few days and will help in the future diagnose a bad DME relay.
Driving around the car feels great, and with an open intake tract letting the engine breathe, the exhaust note even changed and got crisper (more machine-gun sound at WOT). And the Auto-Tune feature (the reason I bought VEMS in the first place)...my goodness, it works well.
VEMS-Tune software is easy to use and mostly self-explanatory - I am not a computer person so the terms and stuff used make no sense to me (baudrate??) but in terms of adjusting numbers it is easy
Peep (Raceboy here) is very helpful with getting it set up and coaching through the installation process.
Overall very pleased with it so far, well worth the $1200 or whatever I paid (more than I paid for the 944 originally!)
I intend to take the car back to the dyno sometime soon, and do back-to-back comparisons with/without the AFM installed, to illustrate definitively the restriction posed by the flapper door.
