[DeTomaso] Speaking of EFI--Water Temp Sensor Question

[Julian Kift]

Larry,

Far be it for me to delve into your World of electrons, but I would expect any competent aftermarket ECU to have the capability to get a signal for an analog gauge to show water temperature on the gauge from a single sensor for both.

Julian

________________________________
From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf of Larry Finch via DeTomaso <detomaso at server.detomasolist.com>
Sent: Tuesday, July 28, 2020 12:59 PM
To: Email List Address For Posting <detomaso at server.detomasolist.com>
Subject: [DeTomaso] Speaking of EFI--Water Temp Sensor Question

Richard,

You need to have a water temperature sensor for the EFI and a temperature sensor for the gauge. The two sensors cannot be placed in the same location, so the problem is locating two ....serviceable.... sensor locations.

The accuracy of a stock water temperature gauge has always been in question due to the mismatch between the sender and the Veglia gauge. Aftermarket gauges tend to avoid that mismatch. In reality the accuracy of any temperature gauge reading is totally dependent on the location of the sensor - whether it is OEM or aftermarket. But does it really matter what temperature the gauge is displaying ?  No, it doesn’t.

Because with enough road miles an owner will come to understand what his cars’s normal gauge reading should be and will use that as a baseline, a baseline that is totally dependent on where that sensor is located. The ....accuracy.... of a normal gauge reading or an increased reading, due to the inherent inaccuracy of any gauge/sensor, is irrelevant.  The owner of that car knows he has a cooling issue when that baseline sees a notable increase in temperature; it is only that troublesome ....increase... that is cause for concern. The ...numbers... on the gauge are irrelevant.

An EFI system, on the other hand, is by design dependent on an accurate and reliable temperature sensor.

The Ford OEM location for the water temperature sensor is on the front of the block, below the thermostat. One can assume they chose that location for a reason of accuracy.

I would place the EFI sensor in the OEM sensor location.

As Mike mentioned earlier, most water pumps have an available threaded boss that can be utilized for the temperature gauge sensor. That sensor location will serve quite readily to provide the baseline reading for the temperature gauge. The accuracy of the baseline gauge display provided by that sensor at that location, as I noted above, is not
a cause for concern.

Assuming your water pump has an available threaded boss, there is no need to install a new bung in the coolant piping system; just place the gauge sensor in the water pump boss.

My 2¢

Larry


Sent from me using a magic, handheld electronic gizmo.
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-------------- next part --------------
   Larry,

   Far be it for me to delve into your World of electrons, but I would
   expect any competent aftermarket ECU to have the capability to get a
   signal for an analog gauge to show water temperature on the gauge from
   a single sensor for both.

   Julian
     __________________________________________________________________

   From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf of
   Larry Finch via DeTomaso <detomaso at server.detomasolist.com>
   Sent: Tuesday, July 28, 2020 12:59 PM
   To: Email List Address For Posting <detomaso at server.detomasolist.com>
   Subject: [DeTomaso] Speaking of EFI--Water Temp Sensor Question

   Richard,
   You need to have a water temperature sensor for the EFI and a
   temperature sensor for the gauge. The two sensors cannot be placed in
   the same location, so the problem is locating two ....serviceable....
   sensor locations.
   The accuracy of a stock water temperature gauge has always been in
   question due to the mismatch between the sender and the Veglia gauge.
   Aftermarket gauges tend to avoid that mismatch. In reality the accuracy
   of any temperature gauge reading is totally dependent on the location
   of the sensor - whether it is OEM or aftermarket. But does it really
   matter what temperature the gauge is displaying ?  No, it doesn't.
   Because with enough road miles an owner will come to understand what
   his cars's normal gauge reading should be and will use that as a
   baseline, a baseline that is totally dependent on where that sensor is
   located. The ....accuracy.... of a normal gauge reading or an increased
   reading, due to the inherent inaccuracy of any gauge/sensor, is
   irrelevant.  The owner of that car knows he has a cooling issue when
   that baseline sees a notable increase in temperature; it is only that
   troublesome ....increase... that is cause for concern. The
   ...numbers... on the gauge are irrelevant.
   An EFI system, on the other hand, is by design dependent on an accurate
   and reliable temperature sensor.
   The Ford OEM location for the water temperature sensor is on the front
   of the block, below the thermostat. One can assume they chose that
   location for a reason of accuracy.
   I would place the EFI sensor in the OEM sensor location.
   As Mike mentioned earlier, most water pumps have an available threaded
   boss that can be utilized for the temperature gauge sensor. That sensor
   location will serve quite readily to provide the baseline reading for
   the temperature gauge. The accuracy of the baseline gauge display
   provided by that sensor at that location, as I noted above, is not
   a cause for concern.
   Assuming your water pump has an available threaded boss, there is no
   need to install a new bung in the coolant piping system; just place the
   gauge sensor in the water pump boss.
   My 2-c-
   Larry
   Sent from me using a magic, handheld electronic gizmo.
   _______________________________________________
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   or approve the archiving of list messages.

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