|Originally posted by FIEROPHREK:|
I jumpered in my 20v drill's lithium battery pack and the windows rolled up and down amazingly! like I said though, not sure how long the motors would last bieng run with 20 volts versus 12. Any electrical gurus here that can shed some light on this?
At 20 V, the motors will heat up much faster, but it might not be a problem considering that power window motors are only run intermittently.
The brushes might wear out faster, and you run the risk of demagnetizing the permanent magnets. If you demagnetize the magnets, then the motor will be weaker than it was originally.
At my work, for testing electric power steering motors, we have them turn left and right against an artificial load, non-stop, for days or weeks. Basically, we beat the crap out of them and then open them up.
Unless you're willing to make a test rig for this, my suggestion would be to try it on your car and see what happens. But be ready to switch back to stock if you damage your motors (and have spare motors). If you want to make a product for sale to the Fiero community, I would suggest driving around for a year, and using the power windows 5x more than normal.
[This message has been edited by pmbrunelle (edited 12-16-2017).]