Yeah i have read something similar, although my understanding of it all atm is still rather limited.
I think the nistune sort of uses what is already in the ecu where as the nismotronic has actually completely rewritten stuff to be able to expand from what is originally built into the ecu,like the larger 20x20 maps.
Tbh I am still trying to get my head around it all lol,there is a little mentioned in this thread if you understand it...
http://forum.nistune.com/viewtopic.php?f=6&t=1271
The battery yes I think you are right,if this causes an issue you can lose it all I believe,i have read a 10 year life expectancy on the battery somewhere though and I don't think this is the only system that uses a setup like this.
There is some interesting criticisms and answers in this thread...
http://www.240sxforums.com/forums/ecu-tuning-section/146962-getting-into-ecu-tunning.html
As for the lead I can only assume you would leave it in but I don't think that would be a problem though tucked under the dash.
I am still not sure, I change my mind daily lol
Question is would I even really benefit much by going to a map sensor? and the answer is proberly not lol
I am only going to be running a 2871 and not looking to push it, I surpose its just the human greed in me wanting the best I can afford and this nismotronics is sure tempting.
At the end of the day though it all comes down to the map, and if I am going to have a go myself it will not dout be underpowered with what ever setup I choose lol
The nismotronics just gives the vibe that its on the up with more to come from an already good looking package,some people are even comparing it to hondadata which I think has had great results.
The nistune don't seem to give the same vibe and seems happy with what it is,which to be fair is proven to work.
I also need to learn more about the advantages with map over maf,i am sure the car would proberly have better capabilities with just the larger 20x20 over the stock 16x16 map but once again I am not sure what I could really gain with this especially as I am not really going to be pushing it on a 2871.
I don't think there is going to be much to be had in the way of extra power at this level which ever way I go,but by going map sensor I think the car could have the potensial to be smoother and maybe better responding,which to my greedy side equals better lol
Then that being said I think I have read that the gtir's throttle bodies can cause mapping issues in the low revs cruising areas when using a map sensor,although I think you can possibly plumb the sensor some way to help relieve this.
I don't know,i am feeling nistune today but come tomorrow and if I am feeling abit more adventurous it will be nismotronics lol
More research me thinks..