Above is the world record test I conducted this year in June in a livestream. The test used 5 B6-0 Estes Model Rockets. The standard output thrust (in light orange) was increased by 6.2 times!!!!! The dark orange/red area is the thrust I recorded using my V2 Vortex Rocket. The Test setup is shown below:
2 strain guages each calibrated individually
electric motor spinning at above 12,000rpm (I think)