<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by G.Siek:
225-250 cooks 50% start to Finish. higher heat 275-325 100% If you watch cycle times and mess around with how long fan stays on at certain temps. regulating the damper can keep cycling times down. On a long cook there could be large temperature swings from day to night (40 degrees sunny to 20 degrees windy) and guru was holding 225 at 50% and outside it got windy and cold the heat being drawn from the cooker causes the fan to run a 90% duty cycle at 50% damper opening. opening the damper will put in more air and allow fan to run less for the same cfm needed to keep the temp up.
Seems six of one half dozen other. same results still will be at 225 in the morning. I wonder what the max temp with the 10cfm dampened down 50% could achieve versus the 10cfm fan running 100% at the same ambient temp. that would the answer when you needed to open it up. seems all relative to max. cooker temp needed. this is all just my own speculation of course. </div></BLOCKQUOTE>
Great detail. As well as Gary Hodgins. Bottom line is that having the larger capacity fan (10 CFM) allows for plenty of latitude to make an adjustment dependent on conditions.
If you get the/a minimum CFM like 4CF your options could be limited.
Getting the 10 CFM for the standard WSM IMHO was a good move and one I've been happy with.
The other advantage is that I can use the same Guru system on other equipment with minimal change. Perhaps just an additional mount/adapter. Certainly can use it on the Performer if I wanted.
Going with the largest CFM and using the damper is key. And has provided for a good bit of flexibility. Basically it's an automated bellows
I like to have large lung capacity and just adjust the blower pattern
I've even used the straight DC adapter/coupler from Guru to eliminate the controller and keep a constant on fan at wide open damper on occasion.