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Old 06-30-2020, 08:02 PM   #1
MiraclePieCo
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Vacuum line to brake booster?

I'm just hooking up the vacuum line to my OG windshield wiper motor. The simplest method is to run a T off the brake booster line. I can't imagine that would cause any issues but I thought I'd ask the experts.
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Old 06-30-2020, 09:02 PM   #2
vintovka
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Re: Vacuum line to brake booster?

I did this for a while and experienced some braking issues and really bad Wiper slow down/stopping. Heard some run an aux vac pump just to run wipers and assist with brakes. Personally i like the electric. Hard to adjust to full sweep and sometimes full retraction unless wet. I installed windshield washers on hood. aimed them carefully, and they work great with electric.
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Old 06-30-2020, 10:08 PM   #3
MiraclePieCo
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Re: Vacuum line to brake booster?

I'm using the original vacuum wiper motor because it's smaller, lighter, and simpler than the big, heavy electric units, plus some previous owner removed the cowl vent so there's no bracket to brace the electric motor to. I'll never intentionally drive my truck in the rain anyway, so the wipers will get minimal use. Where you live, if you couldn't use your wipers you'd never drive your truck!
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Old 06-30-2020, 10:33 PM   #4
vintovka
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Re: Vacuum line to brake booster?

Quote:
Originally Posted by MiraclePieCo View Post
I'm using the original vacuum wiper motor because it's smaller, lighter, and simpler than the big, heavy electric units, plus some previous owner removed the cowl vent so there's no bracket to brace the electric motor to. I'll never intentionally drive my truck in the rain anyway, so the wipers will get minimal use. Where you live, if you couldn't use your wipers you'd never drive your truck!
Too true. Without the vacuum assist type the wipers may stop at a critical moment and reduce vacuum to brake booster. Drove for years with just manifold vacuum off the 235 with factory brakes, The "swish chunk" of the wipers was an old familiar sound as was being blinded by rain when I stepped on accelerator. The electric isn't that big and i hear there are smaller units now.

Yes reliable wipers are very essential here. Got caught in a gale coming back up 101. 45 MPH+ wind and inch a minute rain for a while. Reminded my of monsoon in SEA jungle so long ago. BTW ADs have all the aerodynamics of a
boxcar.
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Old 06-30-2020, 10:50 PM   #5
mick53
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Re: Vacuum line to brake booster?

Quote:
Originally Posted by vintovka View Post
Too true. Without the vacuum assist type the wipers may stop at a critical moment and reduce vacuum to brake booster. Drove for years with just manifold vacuum off the 235 with factory brakes, The "swish chunk" of the wipers was an old familiar sound as was being blinded by rain when I stepped on accelerator. The electric isn't that big and i hear there are smaller units now.

Yes reliable wipers are very essential here. Got caught in a gale coming back up 101. 45 MPH+ wind and inch a minute rain for a while. Reminded my of monsoon in SEA jungle so long ago. BTW ADs have all the aerodynamics of a
boxcar.
I'm running a blower so I have a scroll type vacuum pump and took the engine out of the equation. I am running electric wipers. I'ts small enough to maintain your choke cable. As for aerodynamics I feel the best way to improve it is to polish all your parts.
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