I've read all of the writeups on idle tuning that I can find.

I'm trying to understand IAC steps.
I see alot of guys saying they are seeing 80-100 steps at idle with a larger cam.

I have a 212/212 .561/.561 114+3 cam in a LM7 5.3 and 80# FIC injectors and BW S475/83 turbo running COS5 / 2 BAR Map.
Really really simple setup.
My problem is I'm seeing higher Steps.
750 rpm idle
Throttle stop set high as possible for a 0% TPS reading.
I've got the idle tuned pretty good so it starts up and runs great cold and hot. AFR is high 14s. Timing is around 20* average.

Why am I seeing 185-220 steps?