Staghound Hydramatic Transmission Question

[Malcolm Towrie]

I checked out the Stewart Warner site but it seems the temp sender info doesnt give any degree-to-ohms calibration info (at least I couldn't find it), so they can't be matched to an original gauge, just a new SW gauge. Which is still a good option.
Also, none of the pressure senders, which do give psi-ohm calibrations, match the 0-30 ohm/0-60 psi calibration I found the original gauges have.

However, I did find this good information on all the NAPA Echlin senders and switches which allowed me to find a 5 psi low oil pressure, NC, 1/8"'NPT warning switch and a 250F high temp switch.

In hindsight, maybe I could have found senders for the original gauges with this list.

Malcolm

https://s3.amazonaws.com/pageturnpro...uide112011.pdf

[daninnm]

Hi!> I used a wire wound potentiometer to the gauge wire and turned the pot to get a full scale and then a low scale reading......reading the pot resistance at each point will give you the resistance range sender that the gauge wants to 'see' from the sender....
BTW::::: I have a ton of NOS Cadillac hydramatic parts including NOS clutch discs.
We are driving he Staghound and just moving onto finishing the radio and parts instalaltions in the turret and the upholstery in the turret basket.
DaninNM 5052692056

[Malcolm Towrie]

Dan, I did that for the pressure and temp gauges. I found the oil pressure gauges took 0-30 ohms to go from zero to full scale and the temp gauges took 25-250 ohms.
I have a database of all the senders that NAPA sells. Modern senders don't work anywhere close to these ranges. Have you managed to find senders that match these old gauges?


Malcolm