I recently purchased an older Bachmann 2-8-0 (Spectrum, UP #721) and combined it with a new Bachmann medium vanderbilt tender,
along with adding a Tsunami "medium steam" sound DCC decoder.  When I run it on DC power, it surges ahead and runs fairly fast
with some chugging sound.  Is there some way to modify it to run better in the DC mode?  Are the wire connections compatible between the
original Spectrum engine and the new DCC ready tender?  TIA.

I just received my new S4 engine with sound.  Is there a way to blow the horn in DC mode?