Join Date: Jan 2002
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Re: Needed, some kind of electrical push/ pull device
you dont even need onboard air - think the other way, and install a vacuum pull unit such as the ones used for cruise control, or in central locking systems ( door locks) alternately, some small air cylinders can be plumbed for vacuum use. the door pulls generate 3-5 lbs pull...I honestly dont know if that'd be enough for your use or not.
to control it, try and find a europen can that has central locking ( ie, Mercedes, or Audi) they have a manual vacuum control valce inside the drivers door that you could fit to the dash. another option is a 12v vacuum solenoid used to control emissions gear..again, I know Mercedes, Volvo, and VW/Audi have used them as I use one to control the vacuum-off system on my diesel.