From what I have found the Reventon Pro seems to add on much more timing than most ESCs. Most seem to add 64 steps of timing, from what I can gather around 28-30 degrees in total.
When running the 13.5 MMM in boosted touring car using the Reventon Pro, I used:
11* on the motor
90% Hybrid Boost Active
150K Hybrid Boost Maximum.
Top speeds were amazing and I was working to improve acceleration which wasn't quite as punchy as others.
When moving to the G-Force TS120 I found I had to add more timing on the motor to get the same top speeds with full timing on the ESC.
When going back to the Reventon with the motor on 20* and the same timing settings as before it seemed to cut out and go into sensor less mode. I assume from too much timing.
From this I can only assume the Reventon Pro can add far more than 30* in total. Maybe 30* for Hybrid Boost active and 10* for Hybrid Boost Max??
I have asked SP for figures but it seems to be a closely guarded secret
They did offer very helpful advice on how I can improve acceleration however by reducing start RPM to 3000, increasing DRRS, reducing the Turbo delay and increasing the turbo slope rate.
I also wondered about the end RPM as this is not set anywhere? I assume it must be a set range depending on start RPM?
All this is just my findings with the Reventon but it may help?