Note: I'm building a one trick pony. I still will get an electronically controlled pit someday when I grow up.
I went to AutoZone to pick up some hi temp silicon for my new gasket (thanks @rrp)
. Ended up starting my diy pit controller project. I've been interested in the original pitminder. From my other thread, folks(to be named once I'm on a pc), pointed out it looked like a thermostatic piston from a automotive thermostat.
The automotive thermostat I got opens when hot, closes when cool. I need the reverse. Bought some sheet metal at home depot(from an egger) and got to work.
This is prototype #1, just to test the theory. I know I need to replace my threaded guide with a circular post that is threaded female.
Fixed pieces are the thermostat housing bolted to the "drain plug".
The thermostat piston will push the middle piece of sheet metal flush with the drain plug when hot, closing off airflow. It will retract with the piston due to gravity when cool, opening up for airflow. I need a smoother guide for this middle piece so it doesn't catch. Also will let it get fully flush. Right now you can see nuts in the way. (Swmbo comment - nuts are always in the way!)
My thermostat active temp is 195f. I'm not sure how this will work out to pit temp yet. I assume the pit will run higher, but I don't know by how much until I test.
I plan on using this in conjunction with my maverick.
Total cost so far:
$7 for the 1978 s10 thermo (195f)
$2 for sheet metal.
I need to spend about 2 on posts.
Unfortunately, I travel for the next week. I hope to test on Saturday or I'm gone again for a week.
If this works out, might get better metal, tweak the thermo, etc. If not, it's been fun.