2 ms·

Just a passionate enthusiast with some friends in the industry. Here's a source on the engines being started in pairs: https://www.nasaspaceflight.com/2017/11/

• robocat 9y ago
  Relevant quote from that link: "Instead, Falcon Heavy will take a page from the Space Shuttle’s book and will employ a staggered start sequence – like main engine start on Shuttle where each main engine started 120 milliseconds after the previous. For Falcon Heavy, it is understood that two engines will be lit simultaneously followed by the next two… and so on until all 27 are up and running."
• igravious 9y ago
  Well, thanks very much. Go Falcon Heavy!