Looking to see if this is something we could use

[slc]

As my long power loss project continues, and seemingly, the problem has been found, I am always looking for anything that can be useful to the
community. As we know, a vacuum pump is more or less required for the brakes to prevent loss of brakes when the vacuum from the engine is lost.

Is this vacuum pump strong enough for our needs??? if so, the cost isn't bad.

12 VDC 11" HG VACUUM PUMP
item number: 4-1831
PRICE: $18.95

http://www.surpluscenter.com/Air-Pneumatics/Air-Compressors-Vacuum-Pumps/Vacuum-Pumps/12-VDC-11-HG-VACUUM-PUMP-4-1831.axd

Thanks for any info

s
--
GatsbysCruise. 74GMC Glacier Model.

 

[johnny]

Make a reservoir - 3 feet or so of 4" PVC capped and strap it to the frame behind the bumper. That's worth two or three stops by itself. Hook the
pump to it and then see how long itruns before it shuts off. Report back.

--johnny

DOS Tip: Use check valve so that a catastrophic failure of pump or reservoir doesnt leave you brakeless.
--
76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
"I forgive them all, save those who hurt the dogs. They must answer to me in hell" - ol Andy, paraphrased

 

[terry1]

I wonder if it has an automatic shutoff...might have been turned on and off by the ECM in the vehicle and so might require some control method beyond
an on/off switch. Unless you automatically turn it on when you head down the mountain! :lol:

At any rate, shipping to my zip almost doubles the price, but now I know another vehicle to look for in the boneyard
--
Terry Kelpien

ASE Master Technician

73 Glacier 260

Smithfield, Va.

 

[Matt Colie]

Nice thought, and it might be worth a try, but that is the pump that EPA required be put in to detect if the gas cap had been left open. That way,
when the system does not stay sucked down and you are emitting as much hydrocarbon as a fur tree, the ECM can take time from doing the important jobs
to set the MIL and a code for the dealer to bill you for.

Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit

 

[johnny]

Then it prolly lacks sufficient capacity to be a good brake booster pump.

--johnny
--
76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
"I forgive them all, save those who hurt the dogs. They must answer to me in hell" - ol Andy, paraphrased

 

[RF_Burns]

At 0.35amps, I'm sure it does not have the capacity (volume) to keep up with the brake booster requirements. That's only 4 watts of power, so I'm
thinking it would take several minutes to recover after each brake application.
--
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
Hubler 1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that

 

[RF_Burns]

Also, 11" of vacuum is very low for the booster. My engine will hit double that coming off throttle when I hit the brakes, so thats only 1/2 the
"power" brakes.

--
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
Hubler 1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that