Hi Headsup,
Thanks for feeling sorry (although you don't have to be, I happen to live near the coast so I can get out for those waves, it's just that we don't have any river playspots around here) and the idea for a powerful pump.
As it is, I do have a car but a small one (Fiat Panda, but it's big enough to transport me and my boat both inside the car

) .
I am not that much of a mechanic so I am wondering how you connect the car to the frontwheel driveaxle parts to the car? And what parts do you mean exactly?
Because it sounds like a simple, cheap solution to getting a big engine.
*grin* I really do have to pay more attention to the various programs on Discovery Channel about cars and motorbikes
Cheers,
Michiel