144 is HUGE on the side transfers! If that's for the side transfers you probably are blowing all your charge out the exhaust! For comparison my polini is ported right now to
180 exhaust port
138 boost ports
116 side transfers
It has no problems hitting 11k witha shitty pipe, i'm going for 12-13k with a good pipe this year.
You might need to increase crankcase volume with that much transfer duration in order to reduce crank pressure and prevent short circuiting out the exhaust.