I thought about using a boat bilge blower (they are a electric in-line blower fan for engine compartment ventilation in stern drive boats) in a car over 20 years ago, worked at a boat dealership at the time and had salvaged all the needed parts from junked boats. turns out those dont move enough air. I was only in my early 20’s then.
In my early teens, my dad's boss donated his worn out riding lawnmower to us. Being industrious, precocious kid - I tried to get it working, but the drive was shot and pushing the mower while one's brother steered wasn't fun/8hp Briggs&Stratton wasn't in much better shape.
So, we pulled the mower deck off and welded mounts for push handle and 5 hp B&S - reasoning that 1/2 the power went to moving the mover. But the engine wasn't up to it. We tried running a hotter plug and diesel which did help* but wasn't quite enough; then we came up with idea of using the shop vac as blower.
That electric/gas mover would then cut a 30" swath like nobody's business. But it required connection to an outlet - OK for mowing around the house & by the shop - not so much for the rest of the farm yard.
The fact that TorqAmp has to shutdown after 2 minutes of full power due to thermal overload is disappointing - no using it to add power all the way up the Davis Dam hill. They really need to add a heat sink to the motor.
Personally, I would like to see something more like Dodge's eTorque. I've also been looking at some of the kits to make an electric car - instead of adding transfer case and front drive shaft, install an electric motor and batteries - might be weight neutral. Both of these solutions are provide the torque for the longer time periods I require for a truck.
*B&S engine started on gasoline, but with diesel in tank, and hot plug will make some serious power (you have to kill it by starving it of air and/or overloading it).