ive  tuned mine to  12.5 :1  with almost  no et/mph  gain on the spray
ive been running between 9.5-10.5:1   tune        last time out  went  9.24@150
ive  tuned mine to  12.5 :1  with almost  no et/mph  gain on the spray
ive been running between 9.5-10.5:1   tune        last time out  went  9.24@150