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Lynn Hanover wrote:
I was asking summit racing about their mechanical gauges, wondering if the price included all the necessary parts. they told me that the oil pressure and water temp hook up directly with an 1/8th" line that I cut to fit. I questioned whether the water temp would work that way since water wouldn't be circulating through the line. do mechanical temperature gauges work that way? I assumed there must be a sealed , fixed length bulb/line arrangement that converts temp into line pressure?
what are the pros/cons of using mechanical vs. electrical gauges? I have some of them currently in my plane but will need gauges to run the engine initially for ground tests, and hate to pay for duplicates, so leaning towards the cheaper mechanical gauges. kevin
Kevin, The temp gauge needs to have a probe sticking into the circulation. Doesnt have to stick far into it, but the area you are measuring the fluid temp of needs to be representative of the circulating fluid, not whats at the end of a dead end tube.
Our oil temp sensor is after the oil cooler (coolest point for the most point), and before the oil filter. We used a remote mount filter with oil inlets and outlets on each side. So.. one of the unused inlets has a temp probe in it and one of the outlets has a blind plug in it.
Cant remember exactly where we decided to measure water jacket temp, but its at the hottest point, so likely on the way to the radiator after the water pump...
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