I think the -4* is off of the stock tune...but I'm running 125 on a 87 octane tune...which I'm sure has a bit more timing than the stock tune..
That's what I was running when I had the kit installed at Strictly; Bamachips 87 Perf tune, and no problems (running 93 octane fuel). Now I'm running the same tune with 4º pulled off from 2000 to 8000 rpm. I datalogged with this tune, and the tune hovers between 17º and 21º. The only thing is that when I'm not spraying (I only generally spray when "conducting business"), and I'm WOT, the car feels a little aneamic.I think I'm gonna datalog the stock tune to see what it runs...I'm tempted to add back the 4º to the 87 Bamatune. Doug said I should be ok running 93 octane on his 87 tune.