Some Basic Help & Information

I'm not sure I understand the problem. Are you saying that your engines don't run at a consistent speed with your ZW? If that's the problem then you simply need to add additional lockons around the layout to keep the voltage consistent. Be sure to keep the polarity so that you don't short out anything.

You can run each pair of wires back to the ZW or you can run a set of master wires under the length of the layout (they're called a bus) and tap into them where you need a power boost.

the only time you have constant voltage to the track is when you are running in command mode.  are your engines command?  command meaning TMCC or Legacy. according to your statement no.

I apologize for the confusion or lack of information.  outside of the 736's, 726's and 2055, I have several engines that are tmcc and have railsounds.  Also to answer another question.  I have two of the fastrack terminal sections per loop with power going to the zw.  the engines run ok and the power to each loop seems fine as the engines run smooth with no hesitations.  but I have notices that the for instance that my small steamer that came with my strasburg set will only begin to really smoke sufficiently when it is run at higher speed and there is more power sent to the rails.  Outside of going to say Cab 1 or legacy is there a way for me to run higher and constant voltage to the rail?  or is it not possible and should i just stick to the zw.   i appreciate your patience and direction.

One of the cures for low smoke output from conventional can motored locomotives is a couple of diode pairs in series with the motor.  This gives the smoke unit more voltage for a given speed and improves the smoke output at lower speeds.

Add a couple post war cars to your train. I have found that it take more voltage to run at the same speed thereby providing more voltage to the smoke unit.