Fri Dec 20, 2013 9:02 pm by cornbinder89
I think you'll find that you are think of this all wrong. The King Seeley system MUST have a pulsed signal to work correctly (this has been my obsevation) the early King Seeley gauges used on the K, D and may be early L and R series had the "pulse" unit biult into the sender, one each for oil pressure and temp. The later King Seeley system used one pulsed regulator ahead of the gauges that fed all gauges and used a flat resistance sender. Adding an additional pulsed regulator on a system that already has the pulse unit biult into the sender will not work correctly, nor will feeding a flat 5 volts to a system without a pulse.
On the early system with the pulsed senders, to use on 12 volts, you need to use a regulator the feeds a constant 7.2 volt to the guages and use the orignal type senders.
On a later system you need one pulse "regulator" ahead of the guages (regardless of input voltage 6 or 12 volt) and the more modern type flat resistance senders. This type system was used from sometime in the 50's up till the end of the light line for IHC and Also used by both Ford and Chry into at least the early 80's.
The pulse device shown is not a " regulator" that can be used to make a early 6 volt system comptable with 12 volt. They are two different designs and use two differnt senders . The output of this device is NOT a fixed 5 volt, but rather a voltage that varys between near 0 and near supply voltage (12 or 13.6 volts), If read with a meter it will adv around 5 volts, if connected to a test light, it will flash like a turn signal flasher. The important point is: its not a constant voltage but a pulsed output.
BTW I expermented with exactly what these guy are doing, useing T0-220 IC regulators and heat sinks on Chry gauges, and what I found was, while the guages worked, the accuracy was WAY off, and adjusting the voltage up or down to try and get the guages accuate, tended to make them less so. If you got the fuel gauge to read full with a full tank, the temp guage would be way off, if you got the temp gauge where it was reading correctly it would swing off the scale Or not move at all, with a small temp change, In otherwords, the gauge system did not work as it was designed. After much work I concluded that there was a REASON for the pulse. This was more or less confirmed when I learned about the early King Seeley guage system used in the K series. If you read the manuals about the gauges, it clearly states there is a pulse in the system, The early ones are in the senders, the later ones in the so called regulator ahead of the guages.
The best thing is to leave the system as it was designed and biuld or buy a regulator to supply the voltage it was desgned for.
You'll notice on all these site suggesting this biuld, They show them biulding the system, but none show the guages working nor do they show for example, a fuel tank empty then full and the reading on the gauge, or a temp probe in cold water then slowly heated to boiling and the guage, showing it working. I'm not saying they are being dis honest, but that they lack understanding on how the system works. If you read a Chry manual from the 70's they say the voltage is a pulse that adv near 5 volts, and that is where they get the idea that a constant 5 volts is what the system needs, but no where in the manual does it state that.
Last edited by
cornbinder89 on Fri Dec 20, 2013 9:40 pm, edited 1 time in total.
