with the diesel in Mikes K80, it has a good bit of smoke trailing behind it, very noticeable in hard pulls, for those of us who aren't used to seeing smoke without a smoke system it will make you think you just flamed out (same puff of white smoke as a flame out)...........and it gives a nice little puff when the wheels touch down at landing. it also had a noticeable lag in spool, could be a setting needs adjusted???