the boat is water cooled with billet heads that a friend of mine made for them. it picks up water and forces it through the head and the rest is air cooled with air pulled into it with scoops.. we are guessing it make's about 7hp per engine after all the work we did to them. it will go 100mph as soon as i get good flat water. it weights around 45-50# and the engine turn about 13000rpms the props will only last for 5-6 runs because of the water being like sand paper at that rpm. i won the nationals in 96 for on road mod 1/10 sedan.