dbrannon79
I'm getting there!
if those wire ties are made of plastic, the heat in the engine compartment alone will eventually weaken or melt them. that might give you a "surprise" situation at some point when it's unexpected.This site has a lot of real thinkers!
Thanks everyone!
I oversimplified the "Hold Open" with a sturdy cable bracket and a small wire tie to hold the cable in the open position. If i get in a panic situation to kill it, A good tug will break the wire tie. I did a simulated shutdown with it not running and the zip tie broke relatively easily. I keep a bunch in the console in case I want to use it as an anti theft device. They can get it to turn over and maybe even try to start but it won't go anywhere. lol.
Exhaust brake and Intake shutdown would kill it in a hurry, but might be pretty complex.
Diesel Tractor pull guys use air shutoff, so I went with that.
you might even be able to set it up in a spring loaded way so it slaps shut like it would normally as it would in it's intended use. then rig up a solenoid that would lock it in the open position with the key on. on start up the default method is (works for theft deterrent too) key on, pull cable to open (solenoid holds it until key off), crank her up and be on your way. as soon as you shut the engine off with the key it automatically snaps shut pulling the cable handle in too. you can then use your ignition key as the emergency off shutdown. maybe even wire it in such a way that it also will snap shut if you have other issues like loosing oil pressure.
in this scenario the cable you have will also always get exercised so you know it's not trying to rust up locking open or closed a few years into service.