Datalogging:
Easiest with Torque Pro + OBD Bluetooth or Wifi Code Reader + Android device (phone/tablet). Presuming you already have a phone/tablet, the cost for the rest should be under $50. For example, $5 for Torque Pro from Google Play, + $30 or so for the VGate OBD Bluetooth device. Check out OBD device reviews on Amazon & decide. Probably don't need the high-end OBDLink MX right now (about $100 device).
MAP & MAF serve basically the same function but in different ways. The EBs are MAP-based vehicles. There are 2 MAPs, one is on top of the intake manifold (2bar), and the other is in the air intake tubing (3 bar).
From BiGMaC's Hotpipes Install HOWTO: