Just got my motor back off the dyno. The pulls were done with c-23, now upon further research I find that was not the best move. Motor is a 406 ford, c302 heads, with a wilson sheet metal intake with two prosystem 4500's. The motor has two foggers, and will run about 500hp of no2. The compression is about 12.6, it made 747.89 with the c-23 on Wayne Youngs dyno. Everybody that I have talked to says that its not enough compression or nitrous to run the 23. I have since switched to c-16, we have made six test hits and I have jetted the carb down twice. The motor still seems fat, and I was wanting some insite as to how far of the tune is on motor.