starman wrote:Spud Bud, You are posting almost thumbnail size photos here. I'm sure Mark.f was suggesting larger pictures as well as closer shots.

Can you replace those with larger pictures?

Well i only have a camera phone right now but i will try to get hold of my sisters digital camera

Well, I can't really see much from the pictures. Any chance of getting some better ones? As for as for what you said, multiple sparks can be accomplished with a simple piezo igniter. Simply wire them in series. The width of all of your gaps shouldn't exceed the maximum distance your piezo igniter c...

Okay guys this is my First attempt at an advanced combustion. The specs are:
4'' dia,24'' long chamber(30in. with all fittings included)
374 ci chamber
metered propane
7ft 4in golfball barrel
chamber fan
piezo igniter

I installed the fan and what miracles does it do!! I currently have a 7ft4in golfball barrel on it and i think i need a longer barrel by like 12ft in sdr-21 1-1/2 dia pipe to get more performance. Right now i have a 30in long 4'' dia chamber with about a 1.8:1 ratio. I want to get the most performan...

Here is a damage pic on 1/2in plywood.. Some went through but some just splattered on the wood. I think the fan will give me more consistent results and power.

Okay....I replaced the piezo ingniter for a new one because the old one created poor sparks.(It was about 2 yrs old :shock: )It now has noticably way more power than before but it is still not to my expectations. It is not able to pass through a 1/2'' piece of wood(not ply-wood) which i had as my ta...

Okay fellow spudblasters :lol: I have built the cannon but have ran into a little problem. I am getting poor performance out of my cannon. I was expecting a BOOM!! But only get swoosh.. It does not shoot very hard because i can easily see the spud when shot. I think the problem is that i dont have ...

i could just drill a hole on the pvc a little smaller than the diameter of the thread and screw it into the pvc. Will it be leak proof? This is for a advanced combustion cannon.Thanks. Yeah, that'll work fine. Just thread it in but go 1 turn in, then a quarter turn out and keep doing that till it's...

Okay fellow spudblasters :lol: I have built the cannon but have ran into a little problem. I am getting poor performance out of my cannon. I was expecting a BOOM!! But only get swoosh.. It does not shoot very hard because i can easily see the spud when shot. I think the problem is that i dont have a...

McCoytheGreater wrote:Will you be using propane or Mapp?

At the moment i will be using propane but will eventually use mapp gas for more power.

I have an F.I.P thread ball valve and was wondering how i could thread it into my 4'' pvc chamber. I dont think there is such thing as an F.I.P. tap so i was wondering if i could just drill a hole on the pvc a little smaller than the diameter of the thread and screw it into the pvc. Will it be leak ...

Yup i want a large chamber and barrel for more power!!

MrCrowley wrote:Your chamber probably can be about half that, even 15" is plenty. But it's up to you

What would be the performance loss?

I now there is a lot of fuss on c:b but i think a longer barrel will give more performance. Burnt Latke did many tests on this issue and proved that a longer barrel benefits best, but thanks any way for the suggestion . I might shorten the barrel a little more for ease of transportation though.

Yea it will be used in an advanced combustion cannon.
The specs are 4'' dia. pvc,24''long, and 10ft of 2'' pvc.