Originally Posted by retired trucker
Are your intakes air tight? If you can not shut all intake air coming into the drum, then you can not control the rate of burn. The exhaust is not your culprit. Does your lid fit tight? What type of lid do you have on it? It should fit with a fairly tight fit also. How many intake's do you have, and are they able to be caped or shut off?
I have a lid with a 2in bung, I can cap all intakes I with valve.