Probably.... CAN ANYONE HELP..?
Roy
First- you will be wise if you repost your first response to this thread in its own thread so more people will see it, this thread is over 3 years old, none of these guys are still around to help.
20 lbs of charcoal is a lot, was it lump or briquettes? If it was briquettes then ash build up most likely hampered your efforts, try using a good quality lump such as Royal Oak.
Second get rid of the fire brick, I have no idea why you have them in there but all they will do is soak up heat.
Third either post a picture of the baffles so we can see their position or better yet get rid of them,too, until you can get a better handle on how this pit operates.
Fourth-and this is a shot in the dark- was it windy? Wind will limit temps in offsets if the intake vents on the fire box are not facing into the wind.
I cook on a CharGriller offset(similar to yours, but the firebox is on the right) without any modifications and it works just fine. What I get is essentially 3 zone cooking with temps around 300° nearest the firebox, 250° in the middle of the cooking chamber and a bit lower on the far end. IMHO you should take the time to learn how this pit cooks before you get too caught up in making "improvements" that may or may not be needed.
Here is a thread that you may find helpful, I posted to it as well, Good Luck
http://www.smokingmeatforums.com/t/...ibs-and-temp-wont-stay-up-help/20#post_849612
