These are the details on rack temp variations on my GOSM big block. Outside temp is 76Âº Only using bottom rack Water pan has 3 pitchers of water GOSM regulator between high and middle setting The top rack reads 250Âº Middle rack reads 375Âº (no pic) Bottom rack reads 425Âº At the lowest setting, the top rack will get down to 175. I'm so lucky to have so much control over temps. Ist pic is Susie Q and the Thin Blue. 2nd pic is of all the rack temps. 3rd pic is of top rack temp. 4th pic is of bottom rack temp. 5th pic is Q View of some Smokin' Smitty Wings, I did drop the temp to 350 for the wings.