Related Clues:

• Guns, as a motor
• Guns the engine
• Vivifies, with 'up'
• Races the engine
• Races, as a motor
• Speeds up
• Vrooms the engine
• Prepares to drag
• The R in RPM
• Tach reading
• Enlivens
• Invigorates (with "up")
• Intensifies, with 'up'
• Gives the gun
• Races