Today I found a nice Saf-t-stat , patent applied for in 1926 ,dash mount temperature gauge , working very nicely.It was made in Brooklyn, New York. Cost a whole $22 dollars... pretty good score .
I thought before I mounted the sending unit I would ask if anyone knows
where the sending unit was meant to be placed.
Its the type that mounts to the Head bolt or water inlet bolt . When heating it up with my heat gun and monitoring with my point and shoot temperature gauge , it is very accurate with the thermometer reaching the bottom of the normal zone at 160 and 200 at the top before it goes into the "Danger" zone . The patent is here:
US1893400.pdf (144.0 k) |
I think the ideal mounting place would be between the engine and radiator. If the hose size is the same for an A and a T, then Snyders offers a pipe with a temperature probe fitting that splices in the upper radiator hose. If this doesn't work, then they offer a water inlet for a Model A that has a hole for a temperature probe, but that would measure the temperature of the water after it had been cooled by the radiator.
Good find.
I would mount it to a water outlet bolt. The temp there should be most consistent with average water temp in the head.
It would be fun to have several of them mounted under various head bolts, to see the differences.
rdr
I'm with Ricks. Outlet mounting bolt.
I must have missed something. I thought his temperature sensor was like a motometer and had to be heated by water temperature.
Top of head temperature will consistently, give or take a few degrees, be of water temperature headed for the radiator.
There will be some variation around different areas of the engine due to uneven water flow.
Ralph,
Get one of those laser pointer infrared thermometers. I got one a few years ago before I went really broke. I use it to check radiators to see how well they are doing from top to bottom and across. I have used it to check around engine blocks. I wish I had had it when I had my Pierce Arrow years ago. The block water diverter had rotted away and I had to design, make, and test one myself. I could have tested it more accurately if I had had one then.
Every local circle of friends should have one to share. I rarely use mine, but am sure glad I have it when I want it. (And, yes, I will use it and sometimes loan it locally.)
Drive carefully, and enjoy, W2
A laser pointer IR thermo gun is really cheap these days, everybody should have one: http://www.ebay.com/itm/Non-Contact-IR-Laser-Infrared-Digital-Thermometer-GM300- 50-C-380-C-12-1-NEW-/280737204113
I use mine weekly for different things like cooking, checking electrical fuse boxes, radiators etc..
I have both narrow beam and wide beam IR thermometers. I've never bothered measuring the Fronty, because it has thermostat and waterpump, and never has given trouble, except when going less than 5 mph for more than 5 minutes, due to no fan. That's the only time I see any red in the Motometer. Besides that, there's no good place to see the temp over the combustion chamber.
If I ran a flathead with no thermostat, I'd be measuring a lot, and several senders would be nice, to catch conditions on the fly.
rdr