No matter what happens, this is a huge moment for his space company.
The high risk is apparent after the vehicle provider openly told the public there was a good chance things might end catastrophically.
The billionaire has upped the stakes by putting his own Tesla vehicle atop the rocket, although he's admitted the experimental craft might not even survive past blast off.
As seen in the picture above, Elon Musk's Tesla Roadster is already packed and ready to go...with it being an interesting thing to note that the (apparently) first production auto to be sent into space is going to an all-electric one.
On Monday, he even posted a photo of the auto with a dummy driver Musk referred to as "Starman". The design of Falcon Heavy is meant to carry large payloads into Earth's orbit; however, the powerful machine can even carry a "Dragon Spacecraft". That will come in handy if Musk ever manages to send humans to colonise the red planet.
In a post to Twitter, the tech mogul wrote: "Falcon Heavy remains go for launch at 1.30pm on Tuesday".
Falcon Heavy is 40 feet (12 meters) at the base and 230 feet (70 meters) tall.
-The center booster will continue for a bit longer before engines are shut off.
"And the Falcon Heavy will have to compete against the SLS [Space Launch System rocket] for government missions".
SpaceX's other rocket is called Falcon 9 due to it being powered by nine Falcon rockets. The company hopes to use the Falcon Heavy for missions to the Moon and Mars.
The Falcon Heavy launch will also feature commentary from SpaceX's raft of rocket engineers and mission control crew.
Residents may wish to follow the company's launch webcast for real time information concerning Tuesday's launch.
He says it has been fun to watch an upstart like SpaceX rocket ahead, noting that the company had 18 launches previous year.
An explosion, apart from an eruption of flames and smoke, would destroy Musk's Tesla - and, potentially, the launch pad. Musk chimed back just hours later with his own kissy face for the Blue Origin boss. The launch window stretches from 1:30 to 4 p.m. EDT (1830 to 2100 GMT).