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Coolant flow direction
Which way does the coolant flow, into or out of the intake manifold??
I'm installing the electric fan thermostat and I think that I want to measure the temp of the water coming out of the motor, not going into it. The temp gauge sender is already taking up the hole in the manifold, so I was going to use the hole in the water neck, or in a fitting in the lower radiator hose depending on flow direction. Thanks!! Jon On second thought maybe I want to mount it to measure the temp of the water coming out of the radiator to see if there is enough air flow with out the fan....... |
Water flows out of the intake. Ideally, temperature sending units are located just prior to the thermostat to get the warmest temperature reading that's available as well as insure the thermostat is operating at its stated range.
Ted Eaton. |
Jon,
What Ted said is true.
Put the fan actuation switch in the lower (coolant return) hose. If too hot water is leaving the radiator, the fans will then kick in. ERA makes a nice hose connection t'static switch unit. |
Jon:
Chas has it correct. You want to measure the temp going into the block. If you don't the fan will never go off. Bob |
ERA switch
If you want to try ERA's switch that goes in the lower radiator hose, I have a spare from my build. $40 + shipping.
Chuck |
Thanks for the offer Chuck. My fan came with the switch, but no instructions. Now that I know where it goes I just have to fab an adaptor for the lower hose.
Thanks for the quick replies! Jon |
That's fine
That's fine. As a point of clarification only, not trying to twist your arm, I was offering the whole assembly. Anyway, here is what it looks like if you need ideas. Hose fitting is 2" and the thermostat says 75/70 degrees C, which I assume means it turns on at about 167 degrees F, off at 158 degrees F?
Chuck http://www.chuckbrandt.com/switch.jpg |
Another option is to put a bung in the radiator tank immediately adjacent to the hose outlet. By eliminating the additional hose clamps it then eliminates two additional potential points of coolant leakage.
Rick [IMG]http://www.clubcobra.com/photopost/d...re_135-med.jpg[/IMG] |
In my case the water pump inlet is not the same size as the radiator outlet so I have to use an adaptor anyway. When it comes to simple round parts I like to build my own if for no other reason than to justify owning a lathe.........It may take me 6 hours in the garage, but I'll be able to tell my wife that I saved $40. :) No wonder I'm at 8 years into this build and not done yet.
-Jon |
Makes perfect sense to me!
I wish I had a lathe, I'd make all kinds of stuff too.
Chuck |
I have two sensing bulbs mounted on the top of the radiator. The problem is that when engine is shut down the hot water collects at the top of the raiator and unless master switch is turned off the fans come on and try to drain the battery. The car came with the smallest battery.It didn't take that much. And it has four fans that cover the radiatorcontrolled by two thermostatic switches.Also verry quiet.
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Mike Henry:
Depending on how long they run it may not be a problem. The Spal fan (pictured above) will occasionally come on after shutdown, or if it is on when I turn the ignition off it will run for about 2-3 minutes tops then turns off. So far it has not presented a problem. Rick |
1 Attachment(s)
The last car I built used a factory Ford High Rise intake and it only had one hole in the intake. We used it for the heater hose. For the fan temp sensor, I just welded a fitting in the surge tank in the same place I saw it on an original street car.
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Hey that would be my motor!
Ya, what Kris said...works great! Just have to get better at calculating Celsius to Fahrenheit while driving. :LOL: |
Kris,
thanks for yet another nice detail shot. Steve:) |
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