I've been holding off posting anything on the dyno testing of my 331 cu. in. motor because it's still ongoing. We have only done 2 pulls to 5,000 RPM and still are trying to dial in the A/F ratio and timing. The motor seemed to like more advance on the first pull which was 42 degrees all in at 2950 RPM making 5.5 psi boost at 5000 RPM with 10% under-drive pulley set up. We have changed the secondary jets (bigger) and and have modified the power valve restrictors, but something seems to still be holding the motor back. We will be doing more testing today. We have burned up a few O2 sensors, but they have been very helpful  in determining how each cylinder is burning.

  Ron Lane,  Meridian, ID