UPDATE:
Just had another flight with my friend and for control purposes we had exactlly the same controls set at the same heights on the same server. He was getting 120kts in the climb at 1000ft per min I was getting 180. We climbed to 20,000 it didn't fly above 210kts Auto rich Mixture, full blower, no cowl. 2,500rpm on the prop. we both stabilised at ~210kts.