For a turbo, a WAR chip is a piece of shit. You're still tuning an AFM that at best doesn't handle boost well. So you need a MAF conversion, and people have all sorts of trouble with the Miller MAF conversion, and you're up into serious $.
Tuning the WAR chip isn't a simple matter, in fact it's quite difficult as Barrie will attest.
Just buy a DIYautotune pnp megasquirt. Loads of support, been done hundreds of time, Matt Cramer will supply help where needed. No weirdness, just smart, straight-forward tuning.