if you're using a zw transformer i would recommend a 275 watt that's the largest Lionell ever made AFAIK! a Lionel ZWL has the most wattage but are very expensive almost $800.00 If i remember correctly!
the old engines like that drew a lot of current and the wheels rollers and all power feeds but be very clean and good brushes and also would not hurt to polish the commutator for best efficiency and lowest power consumption !
Alan
