First off, you're much better off asking your question in the
B44.1 thread.
How are your diffs set ? I run mine so that with a good twist of the wheels, the rear will rotate 1 complete turn before stopping, and just slightly more than that on the front, about 1 1/4 turn.
Also, have you checked that your slipper isn't too tight ? On a surface where you'll have good traction (carpet, pit mat, or the track dirt itself) you should only hear the slipper spin/whine for a few feet at most from a dead stop.
And what shock positions / oils / springs are you using ?