HI, I started up my Aggressor this morning with a 91 on puffer and no insert.The first couple of runs on the bench I could not get it to maintain a half throttle setting, it was too rich and the low end would guit on a lean setting.
I leaned the midrange one turn and richend the low end, it ran great and would idle for over 2 minutes.
I know pipe pressure is great for all out flying but not so great for a person that flies at half and three quarter throttle because of the none linear throttle curve of the pipe pressure.
But if I do have problems when flying with puffer pipe pressure I"ll go back to Pipe, at least I am familiar with its bad habits.
Rcpete