After I've got my first pj running (I used the caliber recipie) I wanted to built a more effective pj with intake and exhaust in the same direction.I extended the chamber to 4.64 caliber for a better combustion and reduces the exhaust diameter to 29mm (originally 33mm) to gain a higher pressure in the chamber.At first it was a bit tricky to get it running but after extending the intake about 1cm it starts up a lot easier.
I can't post a vid now. Why? it's sunday and my neighbours would freak out because their all sitting in their garden and unfortunately they aren't very interested in listening to my pj's sound.
