May I have an opinion?
The right and best place for a sensor is the bottom of the radiator, my english isn´t to good, may take some time to explaine.
Sorry!
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| Electric fan sensor Q https://slantsix.org/forum/viewtopic.php?t=14423 |
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| Author: | argentina-slantsixer [ Sun Sep 18, 2005 9:59 pm ] |
| Post subject: | Electric fan sensor Q |
Hey there. I've been running my twin electrofan setup for almost a year. I have to say that I'm quite happy. I do have a questiong, though: is out there some slanter who may have drilled and tapped the side of the water neck for placing the sensor there? I'm asking cuz I'm running my sensor on a T adapter I welded and installed splicing the top rad hose. I wonder if placing the sensor so near the head and 1st ex port and ssurrounded by all that heavy heat retaining cast iron mass would negatively affect the sensor's capability of discerning the correct kick in/out range. |
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| Author: | emsvitil [ Sun Sep 18, 2005 10:32 pm ] |
| Post subject: | |
Get an adjustable sensor and it really doesn't matter.............. |
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| Author: | argentina-slantsixer [ Mon Sep 19, 2005 4:59 am ] |
| Post subject: | |
Adjustable sensor? I wish we had these down there... I'm affraid I'm stuck with plain ole sensors.... inless you can tell me wich maker would have adjustable sensor as a reposition part (I mean, wich cars comes with adjustable sensors) Thank you! |
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| Author: | SlantSixDan [ Mon Sep 19, 2005 6:26 am ] |
| Post subject: | |
Yes, drilling and tapping the thermostat housing works. Doug Dutra's done it. |
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| Author: | skraecken [ Wed Sep 21, 2005 12:05 pm ] |
| Post subject: | |
| May I have an opinion? The right and best place for a sensor is the bottom of the radiator, my english isn´t to good, may take some time to explaine. Sorry! |
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| Author: | SlantSixDan [ Wed Sep 21, 2005 12:28 pm ] |
| Post subject: | |
I disagree with your opinion. The bottom of the radiator is the wrong place for the sensor; in that location it measures the temperature of the coolant leaving the radiator. That's interesting info when compared to the top tank (inlet) temperatures, if you're trying to figure out how good your radiator is, but if you're trying to calibrate an electric fan, then you need to measure the temperature of the coolant leaving the engine. |
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| Author: | skraecken [ Wed Sep 21, 2005 12:35 pm ] |
| Post subject: | |
What took you so long? The important thing is to get "cool" water into the engine from the radiator, then you dont want to check the temperature of the water that comes out of the engine, that the thermostat takes care off. |
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| Author: | SlantSixDan [ Wed Sep 21, 2005 1:46 pm ] |
| Post subject: | |
Putting the fan sensor in the bottom tank means the engine will get hotter before the fan comes on. |
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| Author: | zedpapa [ Wed Sep 21, 2005 2:12 pm ] |
| Post subject: | sensor location |
i disagree. i put my sensor at the bottom hose and the fan only came on when all the coolant was at the same temp. this prevented the fan from coming on while moving as there was always "cool" water coming out of the radiator. most cars i have seen with electric fans usually had the fan switch in the bottom tank. on my car with the 26" radiator it takes a good half hour of idling to make the gauge even get to half. it takes driving at 15-20 mph for about 5 minutes to get it to cool down. zedpapa |
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| Author: | SlantSixDan [ Wed Sep 21, 2005 3:00 pm ] |
| Post subject: | |
Sorry, I was thinking entirely of aftermarket electric fan setups—not factory setups. There may be some factory setups with bottom-tank sensors. But all the aftermarket setups I've seen have been designed for top-tank (or engine water outlet) installation. That's also how Chrysler's always done it on their factory electric fan installations (sensor in the water outlet area on the cylinder head or intake manifold) |
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| Author: | argentina-slantsixer [ Wed Sep 21, 2005 3:13 pm ] |
| Post subject: | |
Really you're discussing about nothing. It's a matter of choice. I like having the sensonr ontop cuz I have some raised comp and raised comp causes the "upper" half of the engine to run hotter. Also, if you're wise enough with the sensor range, is about the same. Of course, if you install a top hosed sensor with a bottom hose temp range your fan will be almost constanlty on, but if you install a higer temp rate sensor on the outlet is the same. I like to do my modifications kinda respecting each makers' philosophy, so I went with the sensor on the outlet (dan has pointed that out for me). I haven't finished my project piece yet. I have the waterneck drilled and I lined a thin brass coupler to get the most sensitive part of the sensor really dipped into the water instead of getting referred heat from the cast iron housing. I have to braze it and test it. I'll post my progress soon!. |
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| Author: | skraecken [ Thu Sep 22, 2005 11:40 am ] |
| Post subject: | |
If you put it on the top you get a much "smaller" range, and its harder to calibrate, but as you said its a matter of personal choice. No hard feelings Dan. |
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| Author: | argentina-slantsixer [ Thu Sep 22, 2005 1:51 pm ] |
| Post subject: | |
here's the monster  I'll install it tomorrow. Sckraeken is right, calibrating the fan with the sensor ontop takes more work., |
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| Author: | argentina-slantsixer [ Thu Sep 22, 2005 8:31 pm ] |
| Post subject: | |
OK I installed it. Runs better in the waterneck than in the T I had fabbed. My sensor kicks in @ 92ºC and out @ 87ºC. Narrow range but keeps the engine cool and the water measured at the top tank @ 88ºC (very steady) |
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