Have my motor on the dyno and it was running rich. We put the air filters on and it went way lean 15:1 and climbing from a steady 11:1 before the filters/spark arrestors. blower motor 850 demon blower carbs. basicly we cut the tops off the spark arresters and now it about a two inch volocity stack that goes to a flat piece of aluminum plate that the scoop mounts to and it is lean. if I take the scoop mount off it goes back to rich. Any ideas???????