"The normal racing model was not exciting or sustainable enough for me to rebuild the team from scratch," he said.
"To bring Brabham back, we have to do things differently."
Supporters will be given rare inside access throughout the process - from its investor search and driver selection, to its first car build, test and race.
They will later also have access to behind-the-scenes footage, live telemetry and radio communications on race weekends.
Sir Jack Brabham passed away in May this year. Photo / Jeff Brass
"(This model) gives people the chance to be part of the team from the start.
"We will open the door to people. (It) will bring fans closer to the action, inspire drivers and engineers around the world."
Brabham has slated a three-year LMP2 program in the FIA World Endurance Championship, followed by a shot at LMP1 in year four at the Le Mans 24 Hours.
Further down the track, Brabham hopes to return to Formula One.
On Thursday, just a day after launching, the project had raised over STG13,000 ($24,000).
Sir Jack Brabham, who died in May this year, won the Formula One world championship in 1959, 1960 and 1966.
He was the first driver to win the title in a car baring his name.
-AAP