How much ET will i pickup with following changes

Same lane, same night, same DA. Next time out gonna shift it at 6 like i always have in the past and see what happens. Might have went the wrong way shifting it at 6500.
Car still picked up a good tenth and a half in ET over what i would have run with the old tranny. Maybe my expectations werent realistic

Can u say convertor slippage !
The looser the convertor, the more slippage , about 100% of the time./ The best hi dollar convertors will not be as bad, but it is still there!-------FLUID COUPLING.