Is there any way to slow down the time in the game, but nothing else?

I also use MCCC
I believed 1 sim day by default was shorter than at real (I believed it as about 18 minutes)
Doing calculations at Excel with some formulas where 1000 is real time, say than the default 25 makes 1 sim day = 36 minutes
Anyway for me is few, then use higher values

I know it is a 2 years old thread, but I found some interesting values then:
42 = 1 hour
63 = 1h30m (in fact 90.72 minutes)
84 = 2 hours