Possible Clues:

• Like a hot rod
• Like hot rods
• Made more powerful
• Made more powerful, a car engine perhaps
• Increased the power of, perhaps
• (Of an engine) made more powerful
• Enlivened Press editor getting in drink
• Possibly made stock car to go faster, if this?
• Given extra power, very much increased power after due changes
• Between first course and last returning energy made one more powerful