The F9A is the same as an E6A minus ignition. It's a very good fuel only unit. With big cams, I think you'll ignition as well. The problem with Haltechs was (not sure if still is) is that they only accept a square wave 5-12V input. Like from the negative side of a coil, or from a hall effect sensor. This is not impossible, but difficult to incorporate on an Mi16. A friend of mine has added a hall effect trigger in behind his power steering pulley. Another option is to add a magnetic sensor in the cam cover, firing off a cam lobe. The neatest, and most reliable, is to use the std. Motronic sensor. Only problem is that it's a very weak output. My goal is to tap into the Motronic ECU after that signal gets amplified, but before it gets timed for ignition. Regardless of what type of ECU you use, you have to fire it somewhere between 60-90 deg. BTDC if you want ignition and/or sequential injection. You can fire anywhere if you multipoint fuel only.