The best title charge I can remember was Arsenal winning their last 13 games in 2001/2002 (the 12th one at Old Trafford to clinch it), with 23 wins and 3 draws from their last 26 matches.
If City win the title with 14 wins in a row to end the season and 18 wins from their last 19 matches, that would just be insane. Including their last 4 matches in 2016/2017, they would have won 68 out of their last 80 league matches, and would of course match last season's record 32 league victories.
Their last 3 visits to Turf Moor resulted in a 1-0 defeat in 2014/2015 so obviously pre-Guardiola, a 2-1 win in 2016/2017 after going a goal behind, and a 1-1 draw last season, so tomorrow's game there will certainly be interesting. I think they will be held to a frustrating draw there tomorrow, but then again my prediction track record is not particularly good.