Exhaust gas analyzer for tuning mixture

My goal was to design something that could be primarily made on a lathe out of metal. If course, if I had a torch, I'd make something pieced together from parts that could be welded together. I know exhaust gasses can get a lot hotter, so I suppose 3d printing one would be primarily for prototyping the design. I'll have to fit my temperature probe into the chamber so that I can shut things down before I get a melty mess over the sensor!

 

I love 3D printing. I is fairly fast to iterate and test a design. This took a little over an hour to print and has printed threads for the M18 1.5 threads of the O2 sensor. It threads in snugly as is preferable. I need to work on the holes for the air lines to improve their fit. I'll also thicken the wall around those holes so there is more overlap between the brass tube and the plastic. I was originally designing this to be easy to machine (and there's a separate cap that would be brazed on, but I'll 3D print it and super-glue it, or I could even melt it on with a soldering iron). I'll probably also add some mounting tabs to allow this to bolt on some spacers inside a case.

 

That is nifty. Dave, do you have that printer at home? What is the print resolution?

 

I built this printer back in 2017, and did a number of upgrades to make it safe and run better.
It's super cheap and there are likely better cheap printers now, but this still serves me pretty well. It can do .1mm layer height and has a .4mm nozzle.

 

Once you get it dialed in (and if you have the desire to take on a new hobby) get some green sand, a kiln, all the aluminum cans your neighbors will spare, and commence to casting.

 

So many skills I'd like to learn, so little time (and spare $$s at the moment).