Slow Smoke Plumes in FumeFX

[Jordan]

Im trying to animate the time scale/burn rate/turbulence size to quickly fill the frame with smoke plumes then have it slow down (and going to 1/3 the time scale) but have noticed that I begin to lose a lot of detail in the smoke and flames. Its is getting much softer and the edges of the smoke are softening and the scale of the "lumps" in the smoke is getting larger and smoother. The Flames are also smoothing out and loosing the small scale detail.
I would have thought the result of changing the timescale wouldnt do that type of thing.
Any suggestions to get the detail back in the slow part of the sim, or just getting detailed slow looking smoke.
Cheers,
Jordan