Originally Posted by
ralmo94
For timing usually you should keep it at stock or a little less Maybe 2 deg, until you get your VE closer. Any knock can throw off your samples, as can over advanced timing without knock. Once you get ve dialed in, then you can work on timing, then you fine tune your VE with the new table. Unless you have vortec heads swapped on, then you can use a stock vortec timing map.
Also be advised that unless you have configured your tune for open loop, you can't just edit according to afr, as the target afr for open loop is not all the same. And also I had issues when I went open loop with blms coming back. These issues I solved, and that's why I posted the files I did in the how to article, so someone else can just easily start with an open loop file.
You can tune with blms, that's what trimalyzer was designed for. I would start with stock bin though, and make sure your injector constant matches your fuel pressure. I don't remember seeing your mods posted, I might have missed it though.