Thread: Flathead dual temp sender-good idea?

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Originally Posted by R Pope

Electricity follows the path of least resistance.

That's true, but an oversimplification. Resistances in parallel are a current dividing circuit, where the current flow through each resistance is proportional to the value of the individual resistances. Said another way, all the electricity doesn't flow only through the resistance of the lowest value ("path of of least resistance"), but through all resistances in varying degree according to their values.

Bob

I made an electronic circuit for my dual sender single gauge temperature monitor that is switch selectable for the side that connects to the gauge, and the other side is then connected to a circuit that will flash a warning light when its sender sees an over temp. The circuit needs to be calibrated to the senders so it takes some fussing with to install; but it duplicates the original Ford circuit with the added advantage of being able to select which side is the primary source.

Originally Posted by Lord Antagonism

Why not have 2 needle pointers in the same gauge working off the same pivot point like clock hands? Red for the Right head, Lime green for the Left head?

Looked at it, just can't make a business case for it.

Originally Posted by BillM

I made an electronic circuit for my dual sender single gauge temperature monitor that is switch selectable for the side that connects to the gauge, and the other side is then connected to a circuit that will flash a warning light when its sender sees an over temp. The circuit needs to be calibrated to the senders so it takes some fussing with to install; but it duplicates the original Ford circuit with the added advantage of being able to select which side is the primary source.

This is the same as option 2, where we use a standard sender and a warning contact on the other side, just like the original, later ford flatheads had. The gauge reads one side and pegs when the other overheats
Mark

Originally Posted by R Pope

Two senders hooked to one dial gives the reading for the hottest head, not an average of the two.

Read the reply - not two senders to one gauge - run the wires to a toggle switch and ten to the gauge. it reads one side at a time.

Originally Posted by oldbuick

When I bought the digital gauges for my car I asked the manufacturer if I could put a temp sensor in the trans and one in the motor and use a toggle switch to switch between the 2. I was told no, unless I put in a VERY expensive special low restance switch, because the gauge wouldn't read correctly. I guess paul274854 has found otherwise.

Yes I did find otherwise