Danny:

**But, the engine will run fine without a change and produce more power with
nothing but the higher compression pistons.**

This si not true.  It is possible that the engine might  actually produce less power, depending on where the thetaPP falls.  In most cases, it is necessary to retard the timing with the higher CR pistons to keep peak pressures under control.

Walter Atkinson
<walter@advancedpilot.com>
(225) 939-7508