I am going to try again because the air pressure idea works. I just need the right parts to make it work and not come apart. It sure looked cool when all that smoke poured out the muffler.

Since I didn't have a valve for my tank it was set up direct just to see if it would work. By looking at my Gage on my air electric air pump by turnning on or off it took barely a 2 pounds to get it to smoke and with my needle valve set at 3 1/4 turns open. The needle valve I used was from a .15 size buggy engine.

avistar181 What I meant by preheating was by using the coil copper tubing and wrapping around my header. I did not solder into the muffler because this was my first time trying this out. I simply wrapped around and connected to muffler with a short piece of fuel tubing. Here is a picture I took