Got Solenoids Hot - help???

[YDLUZ]

I have not had a fun day, in fact, not a fun month.

Wired my new quick fuel micro switch today. Of course, quick fuel is such a great company they include no wiring instructions. No problem, wire it like the nos unit, can't go wrong there. Well, it's a shame that you can wire their switch which has an extra leg to be hot all the time to the solenoids.

So....before I noticed and had a chance to test it, my NOS Big Shot solenoids, especially n2o got very hot. Not sure how long they were on, but at least a minute or so.

How can I verify if I damaged them? What's the chance I damaged them? Should I buy new ones? It was not smoking hot, but very hot to the touch. You could not put your finger on it without burning it.

Got a little advice thus far to just check them good and if they test okay, run 'em. I'm gonna take that advice, but has anyone ever got 'em hot before and not caused damage??????????

[fasteach]

well i think like any other electromagnet, they have some built-in resistance that is measureable against a spec. id measure them at room temperature and then call tech at NOS/holley/lunati/lakewood and see how they stack up. Duke

[Bobalos]

If were me I would put presure to the back of them & fire them off for a few seconds. if they lifted off the seat & did not chatter then they are fine. folks run the same coils for YEARS, thats a lot longer than a few minutes of run time.

Bob

[Zeke1]

There's no way they should have gottin hot I have seen the little one's that looked like they were melted a little in the coil but like they said above you just have to try them they work or they don't there's not much in between ground

[Sparky]

Typically, it isn’t uncommon for Nitrous Solenoids to get hot, due to the resistance they carry.
Most nitrous solenoids will measure between .8 to 1.0 ohms resistance and the fuel solenoids are usually between 1.3 to 1.4 ohms resistance.

In a normal application, you don’t notice the heat of the solenoid, I think the Nitrous flowing through the solenoids helps keep them cool. With the resistance being higher on the fuel solenoid, the fuel solenoid typically won’t get as hot.

You can check the solenoids with an ohm meter and compare them with the above values. Any resistance values lower then this could mean the solenoid could be starting to short. Usually a tighter resistance value will get warm quicker.
Another quick way of checking a solenoid is to pull the coil off and smell it. If it smells burnt, you might want to replace the solenoid. Other then that, like everybody else has posted, activate the system and see if the solenoids sound and act normal.

[YDLUZ]

Typically, it isn’t uncommon for Nitrous Solenoids to get hot, due to the resistance they carry.
Most nitrous solenoids will measure between .8 to 1.0 ohms resistance and the fuel solenoids are usually between 1.3 to 1.4 ohms resistance.

In a normal application, you don’t notice the heat of the solenoid, I think the Nitrous flowing through the solenoids helps keep them cool. With the resistance being higher on the fuel solenoid, the fuel solenoid typically won’t get as hot.

You can check the solenoids with an ohm meter and compare them with the above values. Any resistance values lower then this could mean the solenoid could be starting to short. Usually a tighter resistance value will get warm quicker.
Another quick way of checking a solenoid is to pull the coil off and smell it. If it smells burnt, you might want to replace the solenoid. Other then that, like everybody else has posted, activate the system and see if the solenoids sound and act normal.

The NOS solenoid was 1.0 ohms, should be good to go right???
Also, did some testing and it seemed great.