I gotta say, if you don't have the $800 associated with a standalone fuel programmer, i don't think your turbo idea is going to work... You can't just expect the engine to accommodate all that extra air just by making it run rich. The a/f ratio has to be able to quickly change to meet the demands of having huge, dynamic amounts of air being pushed in from an outside source. Have you considered a wastegate or turbo timer as well? And you have to run oil lines to your turbo.
I think "Beyond Biscuits" has a turbo setup on a GA16i. I would ask him about it.
he has a GA16DET...
no one has a turbo'd GA16i right now. supposedly a guy in mexico, but i kinda have a feeling its a GA15E, because i believe you can get em in mexico.
as for the standalone, you would have to.
Mervic turboed his 16i, but then removed it because the TBI fuel system is so inadequate for it. if the 16i was a dual point TBI system, then you could go with 2 massive bottom feed injectors for mild boost. the main problem with the 16i is the single injector, and thats it really.
i would strongly advise against trying to turbo it. period