The son of a member of the Enovation Racing team indicated:
"All the motors were connected to each other by drive shafts, with the main shaft going along side the driver. The most difficult part of this project was in trying to “sync” eight separate carburetors on four separate motors. This variation of output from four motors was the real downfall of the car as it would twist the drive shaft into spaghetti each time Hiroshi tried to get on the power."
8 cylinders and 440 HP. Interesting idea. Instead of using driveshafts, maybe the track surface could have worked better to keep the engines in sync? I suspect differing wheel speed while cornering, would also put a lot of stress on the drive shafts.