Oh thanks for the info, and for the record he is saying "Oh Snap!". I just love that commercial series.

When installing the screws for the spark to jump across, is it fine to just screw them into the side of the pvc, or do I need to use some kind of glue or whatnot to secure them into the chamber?

Hmm... thats weird, because when I do what you said before I read this it would work, but only half of the time. I guess I need to find a good fuel source. This was my first build and I kind of rushed it. Thanks for the advice.

How much fuel should I be putting into my over powered spitball launcher? The chamber is 2 and an 8th tall and is 1 inch wide. I'm also having problems getting the right amount of fuel into the chamber and having it mix with the air to make it properly combust.

Edit: Changed the fuel but still need help with the amount.

See:Click Me