In the beginning of the 1980s, EP05 was being prepared for pulling express trains. Most of the engines had had multiple steering and pneumatic devices installed, which allowed them to pull trains with two connected locomotives and operate automatic fixtures. First express train, "Górnik" (En.: miner) led by EP05 locomotive run in 1984 on "Centralna Magistrala Kolejowa", achieving a top speed of . In the second half of the 1980s the top speed on "Centralna Magistrala Kolejowa" rose to and as a result EP05 could run at top speed. Some of those engines later had their clutch changed from Secheron to Skoda.