What else do I need besides the basic unit? Some kind of Harness kit? Wideband O2 sensor? Where is the best place to get everything I need and how easy is it to tune if I have no prior experience?

Do I even need it?
My performance mods are:
-Popcharger
-Kinetix v4 plenum
-CNR lightweight stock size crank pulley
-ground kit
-Nismo exhaust

Will I benefit from the unit and if so, what kind of gains could I expect? Would I be better off with a TS reflash that can raise my redline as well?

Jeez, I feel like such a noob about this. I'm much more of a hardware guy; all this electronics and computer tuning stuff gives me a headache...

 

boom

 

I would say, get a wideband first and install it with a set of HF cats or Test pipes Then monitor your A/F curve doing some WOT runs. If your A/F is out of wack then the EU will help you out. A reflash is definatley an option but it is preset and may not get you exactly where you want to be, plus you can not easily adjust for new mods. One nice thing about a reflash is that it can give you a more aggressive base map requiring less manipulation of the EU maps. There are two different TS reflash options. One is the limited version that doesn't touch timing or fuel but adjusts the rev limiter and some other areas, the other is the full blown reflash where they manipulate the timing and fuel curves based on your mods. I have a custom TS reflash with an EU and tuned my car on the road. I would say that anyone who can figure things out and can read should be able to use the EU with success. It has great datalogging features that really help you to see what is all going on and you can use practically any wideband 02 controller out there to capture as an input and datalog as well.