watercooling on our vehicles is a novel idea.. lemme go into a bit more detail here..

boats use watercooling .. they do so by picking up fresh water from there lake pond river ect.. and running it through the head.. then passing it BACK into the tributary

this poses a problem here.... on a 1-1 vehicle we use a thermostat.. for the purpose of SLOWING the water down to keep the waters temp at bay and allow it to cool the engine better by drawing away more heat .. if you remove the thermostat from your 1-1 car.. it will start to overheat because the water isnt in the radiator long enough.... the system shown above doesnt do that.. its using a fairly high speed pump thats going to cycle the water at a rate that it wont be in the radiator long enough to cool it off.. to work effectively youll need to slow the pump.. or create that check point for the water to be in the radiator long enough to actually cool it off

if this could be accomplished and a high speed system that would create the check point for a few seconds at a time to allow the water to properly cool off before returning to the head then it could work great.. but then we run into the issues of cartwheels.. frontal impacts and such.. and a metal radiator

so again back to square one.. our engines are best suited with an oversized cooling head to keep the temps at bay.. unless your using the vehicle for a pure show piece.. its just not worthwhile