Looking for a 12v vacuum pump to open and

[physiques]

close butterfly vavles. Needs to be realitively small, any ideas on what I can use? I was thinking cruise control vacuum or winshield washer pump, any help would be greatly appreciated.

[MagicRat]

Originally Posted by physiques

close butterfly vavles. Needs to be realitively small, any ideas on what I can use? I was thinking cruise control vacuum or winshield washer pump, any help would be greatly appreciated.

Welcome to AF.

The items you indicate do not generate vacuum. Most gasoline engines produce vacuum in the intake manifold at light throttle use. Autos use such vacuum to operate a wide variety of devices, such as cruise control diaphragms, power brake boosters, ventilation valves, etc.

General Motors installed a 12 volt vacuum pump in their J-car models (ie: Chevy Cavalier or Pontiac J2000, with the 1.8 liter engine only) in the early 1980's. You may find such a motor at an auto parts retailer or through a GM dealer, or possibly an auto dismantling yard.

Also, I googled "12 volt electric vacuum pump" and came up with several vendors in about 5 seconds, some have on-line catalogs.

[physiques]

I also googled vacuum pumps and came up with a bunch but I'm looking for something used and inexpensive to test my theory. I wouldn't mind spending the additional money once I was sure this will function as I wish.
Thanks for the input The search continues

Originally Posted by MagicRat

Welcome to AF.

The items you indicate do not generate vacuum. Most gasoline engines produce vacuum in the intake manifold at light throttle use. Autos use such vacuum to operate a wide variety of devices, such as cruise control diaphragms, power brake boosters, ventilation valves, etc.

General Motors installed a 12 volt vacuum pump in their J-car models (ie: Chevy Cavalier or Pontiac J2000, with the 1.8 liter engine only) in the early 1980's. You may find such a motor at an auto parts retailer or through a GM dealer, or possibly an auto dismantling yard.

Also, I googled "12 volt electric vacuum pump" and came up with several vendors in about 5 seconds, some have on-line catalogs.

[vgames33]

Check out something in the scrap yard with a diesel. I think they all have vacuum pumps to run accessories.

[72chevelleOhio]

Originally Posted by vgames33

Check out something in the scrap yard with a diesel. I think they all have vacuum pumps to run accessories.

You forgot "older" after "something".....dont wanna be looking for a pump in something newer with the electric motor actuated stuff..

unless some mfg's still use vacuum, then its not as funny...

[KiwiBacon]

Originally Posted by vgames33

Check out something in the scrap yard with a diesel. I think they all have vacuum pumps to run accessories.

Most diesels that require vacuum have a pump either driven off the front accesssories or off the back of the alternator. I haven't found a diesel vehicle with an electric vacuum pump, but I haven't seen them all.

[physiques]

This maybe a tougher find then I was thinking... Again thank you everyone who has offered help.

[J-Ri]

You got me curious, what's you theory? I do understand if you don't want to share, I've got a couple of those in the works right now.

Is there a reason manifold vacuum won't work? It's incredibly cheap and doesn't take up much space

[physiques]

Originally Posted by J-Ri

You got me curious, what's you theory? I do understand if you don't want to share, I've got a couple of those in the works right now.

Is there a reason manifold vacuum won't work? It's incredibly cheap and doesn't take up much space

It's not a secert. I added an exhaust system to my car that works off the cars vacuum system to control the flaps inisde. Being this isn't the exhaust that came with my car I don't have the vacuum running to the back of my car. I know I could probably run the vacuum back there but if I can find a 12v vacuum source I would be able to control flaps with the flip of a switch. I'm trying to find a fairly small unit for easy mounting and hiding. Any input?

[GreyGoose006]

i assume the switch being made is to open the exhaust for more power at WOT.
it might be easier to use a solenoid actuated by the throttle position sensors voltage.

[physiques]

Originally Posted by GreyGoose006

i assume the switch being made is to open the exhaust for more power at WOT.
it might be easier to use a solenoid actuated by the throttle position sensors voltage.

Actually its just the oppersite, the exhaust is wide open already I want to have the abilility to close the valves which will cut 2 of the 4 pipes out and the 2 its closing are straight pipes leaving the 2 that remain open baffled. Reason for this is 1 when starting the car in the early morning it will quiet it by nearly 50% pleasing my neighbors and when I want to a bit more quiet I have control. I don't know if a solenoid would be easier, but I prefer to have the valve work off a switch.

[vgames33]

I didn't know that most vac. pumps are belt driven, but the 12v pump for the air ride on my '83 Toronado is hooked to the cruise diaphragm. It may not be a vacuum pump, but it has to be pulling some kind of vacuum.

"Actually its just the oppersite, the exhaust is wide open already I want to have the abilility to close the valves which will cut 2 of the 4 pipes out and the 2 its closing are straight pipes leaving the 2 that remain open baffled. Reason for this is 1 when starting the car in the early morning it will quiet it by nearly 50% pleasing my neighbors and when I want to a bit more quiet I have control. I don't know if a solenoid would be easier, but I prefer to have the valve work off a switch. "

A solenoid can be controlled from a switch. Its probably easier to find a solenoid to control the valve than it would be to find a 12v pump.

[curtis73]

There are a few thousand solenoid cutout valves for exhausts on the market. I think it might be easier to install one of those to select which path the exhaust takes.