The UNBLOWN fuel deal (as run in NHRA) doesn't work in a boat with a "conventional" set-up. An unblown fuel motor (as run in NHRA) needs a tremendous amount of "load" on the motor to make it run right. Nobody has yet devised a way of putting more "load" on the motor in a boat.
Jim Pisciotta tried unblown fuel unsuccessfully for a couple of years in a Top Alcohol Hydro, before he pulled the plug on it.
I think a way to make it work would be to put the equivalent of a automotive brake rotor on the drive shaft somehow. Then have a brake caliper and brake shoes activated by a timer system to "drag" on the rotor to apply a "load" on the motor to allow it to efficiently burn all the fuel that is run through a modern style fuel motor...
What do you think???