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Old 08-13-2007, 05:29 AM
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Add a vacuum canister?

Hi all,

I have a stock 56 F-100 with a 272 Y-block. It has vacuum windshield wipers. I also have power brakes (booster under floor). I have had zero issues with the brakes as far as vacuum. However, going up a long hill my windshield wipers just stop.

Then again...I have never needed to hit the brakes going up a long hill.

I know I can convert to electric wipers, but I do not want to do so. I want the truck to look stock.

Can I add a vacuum canister to improve the wipers? I think I can hide it somewhere.

If so...can I get one from any particular car in a scrap yard?

I know buy a new one...but being on dialysis (300 miles a week) 3 days a week has killed any budget that I had.

Thanks,
Brian

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Old 08-13-2007, 05:47 AM
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I just parted out an 58 Chevy truck. They used a dual action fuel pump with one diaphram to run vac wipers. Did Ford use a D/A fuel pump on trucks or cars with the Y block? It would fit back to 54?

I don't know how long of a hill you could take with a vac storage can. I don't work on modern cars, so I don't know what has the biggest donor. I saw a decent sized one made of plastic in the shape of 9? spheres moulded together on a Mercedes Sl early 70s. Plus you could make one from a heavy wall steel tank.
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Old 08-13-2007, 05:55 AM
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Ford didn't use one that I am aware of. My fuel pump has a glass sediment bulb on it. No vacuum anything there.

The only vacuum line on the truck (before I added the booster) went from the intake manifold from the vacuum wipers. It now has a "T" and a line going down to the booster.

The Mercedes sounds interesting, but I know there are none of them around here in salvage yards. I have only seen one or two on the roads and they were probably tourists.

There are very few foreign cars around here...other than the modern tiny ones (toyota, honda, nissan). LOL

Anyone know of a vehicle that has a big vacuum canister on it that I might look for?
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Old 08-13-2007, 06:40 AM
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wow, talk about a "cobwebs" subject....

immediate fix:
(higher Hg=wipers work=you need less motor load on that grade):
in the rain.... on that hill, use 2nd gear for higher (15"+) Hg...."back in the day" if a truck had any load on board on a grade you had to downshift to have any wipers!
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Old 08-13-2007, 06:44 AM
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Yeah real old subject (about 50 years?).

The truck is usually unloaded when I hit the highway. No major hills locally. Downshifting this 3 light duty speed at 50+ miles an hour is not a very good option.

Guess rain-X is the best option for now. At least that is relatively cheap.
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Old 08-13-2007, 07:55 AM
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Some GM vehicles had a electric vacuum pump ( 12 volt ) . I would look at a Diesel Cadillac. A few Diesel pickups had them too. Another place to look ... some of the smaller front wheel drive cars had them.
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Old 08-13-2007, 12:13 PM
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Reading while lurking, thanks for the info. My 292 is running 2 fours, and I am having trouble with the power brakes, my plan was to add a canister, but now I'll look for a factory vaccume pump. Thanks guys.
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Old 08-13-2007, 12:23 PM
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The truck should have a dual action fuel pump. The wipers operate off manifold vacuum normally but the vacuum pump supplies vacuum when manifold vacuum drops.

If you are climbing a mountain, the accessory vacuum reservoir would deplete itself. I would use an electric vacuum pump before a reservoir.
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Old 08-13-2007, 02:08 PM
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An electric vacuum pump would be great. Now if I can just find such a thing. Not many diesels (cars or trucks) in salvage yards around here. I didn't know cadillac even made one.

Any clue what front wheel drive cars had them? That would be way more common around here.
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Old 08-13-2007, 02:52 PM
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re: add a vacuum canister

www.cmwauto.com

everything you need...$205

your welcome, and by the way, I am planning on moving back to Arkansas next spring. Looking for a place somewhere around the Mt. Home area. Miss my trout fishing. When I get there, I'll help you with your Y Block. Used to race them in the old days, still have a few boxes of parts somewhere.
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Old 08-13-2007, 02:56 PM
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If I get one, it will have to be from a salvage yard. With dialysis and doctors bills, I have no budget. Even $200 is way out there. Thanks for the link though.

It would be cool to meet someone who even knows what a Y-block is. Not many around here know anything about them. LOL
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Old 08-13-2007, 03:05 PM
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why not just get an electric wiper motor? ive seen them on the web for around 125.00. look for companys that specialize in your truck.
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Old 08-13-2007, 03:09 PM
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Yes...I know I can swap it to electric. I do not wish to. It is a stock looking truck. A vacuum pump can be hidden fairly easily and underhood remain stock looking.

Currently there is one vacuum line under the hood that is not stock. I want it to stay that way.
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Old 08-13-2007, 03:43 PM
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Add a vacuum

Vacuum cans are very common on lots of of 70's, 80's and 90's Ford and GM products. Lots of the Fords use something that looks like a tin can, the GM's use a plastic ball. Look for the vacuum cans in the heater / ac system. If you call a local junk yard, or recycling yard as some like to be called, I'm sure they'll know what I'm talking about.
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Old 08-13-2007, 05:13 PM
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vacuum canister

You can also buy a vacuum canister at a speed shop. Some guys put them in their power brake system if they have a sorta hot cam and not enough vacuum for their power brakes to work.
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