You sure you are using the correct units? an 118" long CC is almost as long as my car!
You sure you are using the correct units? an 118" long CC is almost as long as my car!
Unfortunately, yes, I'm sure. CC realy 118 inches is 3 meters in our metric units.SheffSmoker wrote: ↑April 3rd, 2021, 5:48 amYou sure you are using the correct units? an 118" long CC is almost as long as my car!
No. Then (more then year ago) I did not know about this forum yet ...
You are absolutely right that the coldest point is right at the exit from the CC.Dirtytires wrote: ↑April 4th, 2021, 10:22 amAll the volumes of a pit are important. It might make sense to run the numbers off the pit calculator and then compare it to what you have. With an undersized firebox and an oversized chimney, I would expect a really cold running pit...especially at the chimney end of the pit. When all the parts are in the proper ratio (firebox size, cook chamber size, throat, chimney and intake), everything will run much easier.
I entered the stack diameter, 8 "into the calculator and it returned this ...Dirtytires wrote: ↑April 4th, 2021, 10:24 amBut to answer your question, it's the volume of the chimney that is important, not the diameter. You can easily cut it down in length to get to the proper volume. As it sits, I would guess you are about double what is recommended.
In my stack, there is a damper for adjustment, it is usually always 100% wide open, can I recreate narrow pipes with it, or is it not the same thing?tinspark wrote: ↑April 4th, 2021, 8:57 pmI haven't run the numbers to confirm, but as a cheap test, you could find some light gauge sheet metal duct ( we call it snaplock pipe here in the states) and drop it down the top of your larger pipe and seal it off inside your cc with a blank off plate, which is essentially a flat square 10x10 plate with a 5" hole fastened with screws. Just to do a few test burns only. If it works you could either rip out the nice stainless stack that you have, or just run a permanent smaller size inside the existing pipe. Of course you would want a thicker permanent pipe, but as a cheap test......??. .... just a thought
Here is a link to some galvanized (for testing only) light gauge duct. Might be able to find it cheaper locally or a similar option for a stack test..
https://www.amazon.com/DUCT-PIPE-GALV-3 ... 649&sr=8-3