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Old 03-26-2009, 10:21 AM
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Electric brake vacuum pumps

Good morning People. I have a 1960 Impala 2 door hardtop with a 425 horse 396. My problem is I have very little if any vacuum for the power brakes. I am still running the stock drum brakes on the car . I bought a no name electric vacuum pump from a local dealer a few years back and now just got around to installing it. Back when I bought it I was told it was a continuous running pump. Does that sound right! Im just afraid it will start to heat up and quit. I also added a cut-off switch from SSB products and now it seems when the pump starts to reach it's capacity it slow's down but does not come to a complete stop most of the time will this damage the pump Also when hooking this thing up I pretty much eliminated what little vacuum I was getting from the engine. Can I run off the pump entirely or do I have to plumb it back to the engine. I have not driven the car since i did this Your help would be greatly appreciated. Thanks

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Old 03-26-2009, 10:34 AM
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Personally, I would run the brake booster solely off the vacuum pump. The switch you have should turn the pump off completely. I don't believe the typical vacuum pumps are rated for 100% duty cycle, but I am sure that listening to the pump run constantly would drive me 100% nuts.

Good Luck

Joe G.
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Old 03-26-2009, 10:42 AM
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electric brake vacuum pumps

Yea I was thinking the same way. as far as the vacuum pump not turning off I wonder if the pump is waek and struggles to reach the switch settings i will have too hook up a vauum guage to find out exactly what it is putting out. Thanks for the info.
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