19 degrees BTDC stock before PCM adjustments,
22 degrees Diablo canned tunes before PCM adjustments
24 degrees B&G canned flashes before PCM adjustments
PCM adjustments are knock retard, IAT,Ice torque management etc.
All this gets thrown out the window on a custom tune,
I myself am testing at 28-30 degrees BTDC.
Another thing I'm researching is how far back the stock PCM will pull the timing back, I have programmed a total of 36 degrees BTDC and have seen the PCM pull 8 degrees out of that ............. I'm still looking for all the answers.