RE: The unofficial Home of all that is Nitro Vee...
if you start in in the bathtub you'll smoke the house up real quick, another idea is to sit it in a big rubbermade or similar tub, outside, also do like i did and run the cooling exit out the side of the hull, then t the extra pressure tap on the manifold into the exhuast pressure line(to the tank) this will help cooling flow significantly also...and 5%fuel will work, but on 15 im having a hard time pushing the 30mph barrier(dont think i have it yet) i may try something around 30-35% in it to get more speed...5 will run fine though, justy dont expect it to be a real firebreather, which its hard to make any pro.15 a true smallblock powerhouse