Vacuum Pump Questions

Does anyone know how much of a vacuum a cruise control vacuum pump is capable of? I realize they are all probably different. I'm asking because I need a 12v vacuum pump that is relatively small in size. It doesn't have to produce a lot of vacuum. If it could get up to like 9 psi or so that would be perfect. Are these little pumps capable of that?

what's it for?

Well it is for an invention I am building. I've been looking into little diaphragm pumps and things, but they cost much more than I would like to spend. A vacuum of 8 HG or greater would be great.

http://www.gastmfg.com/pdf/miniature/2D.pdf

Basically something like that? Are any cruise control pumps capable of anything near that?

they operate actuators on the throttle body, right? similar to the ones used on turbos?

if so, i guess they should be able to, but hopefully someone else on here can give a more difinite answer.

I would think it would be rare to find a "standard" vacuum pump for a cruise control since most are operated on manifold vacuum- gas engine. Have you tried looking for one for a diesel --- like a VW maybe??

So I won't be able to find a vacuum that runs off of only a 12v input?

What about a washer pump?

So I won't be able to find a vacuum that runs off of only a 12v input?

They are out there and several diesel vehicles come stock with them.

But they aren't common or easy to find. Let us know what you find.

The other thing to consider is operating conditions. If you will be using this "under-hood", it should be made for this service because of the high temps otherwise it will fail quickly...

The other thing to consider is operating conditions. If you will be using this "under-hood", it should be made for this service because of the high temps otherwise it will fail quickly...

Unless you're right next to the exhaust, underhood temps aren't an issue.

My temp sensors would read at the most 10 degrees C above ambient to one side of the engine bay (the side the exhaust was on).

any positive pump can be turned into a negative pump. If you give us more details about the enviroment the pump will be dealing with (fluid? Air? Temps? Full range of pressures?) We might be able to offer suggestions. But with what you've offered so far, assuming weight and size aren't serious issues, a positive displacement fuel pump, such as holley red pump, would work well.