With your combined knowledge of mechanical engine function can you address the following?

Is their a point (Mixing Ratio) of combining 100LL AVGAS with 92RON or better MOGAS that the Reid Pressure Number stays low enough that Pre-Ignition or Detonation is not a factor in the Continental TSIO-550, TNIO-550, IO-550 or an M14P Radial.  With the fluctuating price of refined fuels and talk of mixing these or using auto engines (alternatives), it has me wondering.  I had heard mention that the radials can handle a blend.  Have you ever obtained dyno results on blended fuels with these powerplants?  Is this a potential with the PRISM system?

John W. Cox