400 amps???!?
Guys, look at that dinky little solenoid on top of our GP controllers and tell me that little thing is handling 400 amps.
That 400 amps would be absolute best case scenario with no voltage drop from the batteries, wiring or relay. In reality we trade high current for longer heating times.
Every beru zd9 I have tested with a low ohms meter reads 0.25 Ohms, 12V/0.25Ohms=48A.
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As for the factory relay it can handle the high current for short periods but keep in mind they do fail and with the factory wiring designed to be smaller to reduce the load on all the wires, battery and relay.
Here is a direct replacement for one of our GP solenoids:
https://www.amazon.com/APDTY-1994-2002-F81Z12B533AC-International-1826634C94/dp/B01MZIGKQT/
Product description
Brand New Glow Plug Relay
Fits 1994-2002 Ford or International Trucks w/ 7.3L Diesel
Rated To 100 Amps
Replaces F81Z12B533AC, 1826634C94, 1831646C1
The powerstroke glowplugs draw way less than the idi glowplugs, I haven’t compared them side by side but I know the solid state controller used on the power strokes won’t run the idi plugs as the idi plugs draw way more current.
@ifrythings nice post. is that installed with a 10 gauge wire feeding four of them?
It was 2 parallel 14 gauge wires about a foot long that I used for the test.
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I'm more interested in the amps at .5 seconds. 1
,000 amps at 1 volt doesn't mean much to me. Still looks higher than the 25 per stick I was guessing.
Heres the begin part of the graph zoomed in, the power supply is trying to start up in a soft start mode, over currents for a bit unit the glowplug current drops enough then the voltage goes solid.
Note:the current range is changed in this to 40A/division and the time base is zoomed in to 50ms/division
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