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Old 03-16-2013, 08:34 PM
vht vht is offline
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Vacuum pumps

With the cam in my Chevelle, what little bit I had it running, I'm thinking I may need a elec vac pump. I may try a canister 1st but if that don't work so well I'll have to go to elec. What have you all used? Jeg's is like $279 so I was wondering if anyone has used 1 off of a late model GM? I've never ran 1 so I'm looking for advice. I don't want nothing that is loud and I guess it would need to kick off and on as needed. Need some ideas from someone that has used 1. Thought about going to manual but would rather not if possible.

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Old 03-17-2013, 05:52 AM
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Electric vacuum pumps were used on GM motor homes and for some reason on some of the smaller GM cars. I would find out what models used them and then do some junkyard shopping. They should be a lot cheaper than something brand new.
gmcmotorhome.com - Supplemental Vacuum Pump


Bruce
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Old 03-17-2013, 07:21 AM
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Try switching the brake pedal ratio to manual (6 to 1).. It worked for me....
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Old 03-17-2013, 02:54 PM
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Thanks for the help.
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Old 03-17-2013, 05:13 PM
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You can get the same pumps on ebay for quite a bit cheaper. I actually installed one last summer but I cant say I reccomend it. Their built pretty cheap and I don't really trust it. You will also need to install a big vacuum canister because they won't keep up with normal driving.

You might look into getting a bigger brake booster and a canister rather than going the pump route.
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Old 03-17-2013, 07:06 PM
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I've got the bigger booster, for that type car, so I think I'll plumb in a canister and try it. I'm waiting on a Quick fuel carb and I still lack exh, so I'll see what happens once I get it road worthy. I had it running for about 10 minutes so I'm going by what I felt in the garage.
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