Hi BritTorrent,
I'm afraid there is not many public data except what you'll find in the manual linked above (which is about an older M53-5 version of the engine, we have the M53-P2), and what is (will be) in the DCS manual.
OTOH, with its big fuelmeter, the aircraft makes it ~ easy to figure :)
For climbs, you may use those numbers (they're not the actual ones, but the "simpler" ones used by crews when they don't feel like digging in books):
- best climb speed for full A/B climb: 0.95 (clean aircraft) to 0.90 (big tanks+2 magic)
- best climb speed for MIL climb: 0.90 (clean aircraft) to 0.85 (big tanks+2 magic)
By the way:
This one is easy to figure out: Full A/B is mandatory to take off in this aircraft, up to 250kt (light aircraft) or 300kt (heavy aircraft). :D
++
Az'