How to Megasquirt your 3G Hemi
Yeah, I think the computer can do just about anything you want to it, but you have to figure it out, lol. The circuitry to run it is probably moderately simple (guessing it's something like a variable valve), but the programming and logic behind when to deploy it is the big question.
Guessing it's similar to MDS. Technically speaking, you could probably just have an on/off switch on the dash that powers the MDS solenoids, but the transition would probably be pretty noticeable and if the operating conditions aren't right you might be hurting the engine. The factory computer monitors so many sensors to determine when to activate MDS that's really the main question. Turning it on and off is easy, figuring out when is more difficult. I think VVT is a little more complex in that I'm guessing it has a "range" of activation (advance/retard cam 1-5 degrees or something like that) as opposed to "full on" and "full of". I could be wrong though. I think VTEC is an on/off style VVT.