Update on my 91 P5i, I finally gave on the stock ignition, cutting out at full throttle and to what I believe was the cause of my crash at take off.
Any way I now run it on two percent nitro and seven percent oil. I since switched out the stock muffler with a Jett 90 size muffler. It now turns around 96 to 9800rpm with a APC 15x8 prop.