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  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » power brake boost

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    2/07/2023 11:26 PM  #1

    Cab4word67
    Senior 24-7 FYI Addict

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    From: Portland, Ore
    Registered: 4/06/2019
    Posts: 1,154

    power brake boost

    Today I bought a Leeds vacuum pump to help my power brakes out. With my new motor i have a whooping 12" of vacuum. I figure this mite aid in my braking ability's down the road. Anyone out there use them?

    Slammed Big Blue, ran over the varmints that messed with the Stang. Now all is good in the NW
     

    2/08/2023 8:23 AM  #2

    BobE
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    From: White Plains, NY
    Registered: 4/04/2013
    Posts: 2,636

    Re: power brake boost

    I have not used a vacuum pump.  I believe that at least 16" of vacuum is the design base for optimal performance.

    65 Fastback, 351W, 5-speed, 4 wheel discs, 9" rear,  R&C Front End.
     

    2/08/2023 8:25 AM  #3

    Bullet Bob
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    From: Montrose, Colorado
    Registered: 4/01/2013
    Posts: 4,885

    Re: power brake boost

    Don't know anything about "Leeds", Chris.  But I do have experience with poor brakes due to low vacuum.  Until I went back to the stock HO cam in the Heap, it was pulling about 10" of vacuum and brake performance was not good.  I was only generating about 750 PSI on the front or rear calipers.  I also went to a vacuum pump but didn't want electric so I used a mechanical pump from an E-450 Ford Diesel van.  Since I have the '89 Crown Vic front dress on the engine I was able to mount the vac pump in place of the deleted air injection pump. 
    17 inches at all times and the brakes were very happy....me too!
    The electric pumps were pricey and had a reputation for noise.  The mech. pump cost $70 or so from Rock Auto and is silent.  Some fabrication is required.

    BB1
     

    "you get what you pay for, good work isn't cheap, and there are NO free lunches...PERIOD!"
     

    2/08/2023 2:21 PM  #4

    Cab4word67
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    From: Portland, Ore
    Registered: 4/06/2019
    Posts: 1,154

    Re: power brake boost

    I will let everyone know after I install. Got it on Amazon "used box' for 300. I installed one on a 57 3100 and it worked quite well. we will see.

    Slammed Big Blue, ran over the varmints that messed with the Stang. Now all is good in the NW
       •Thread Starter
     

    2/08/2023 2:34 PM  #5

    Raymond_B
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    From: Fort Worth, TX
    Registered: 4/01/2013
    Posts: 1,201

    Re: power brake boost

    Bullet Bob wrote:

    Don't know anything about "Leeds", Chris.  But I do have experience with poor brakes due to low vacuum.  Until I went back to the stock HO cam in the Heap, it was pulling about 10" of vacuum and brake performance was not good.  I was only generating about 750 PSI on the front or rear calipers.  I also went to a vacuum pump but didn't want electric so I used a mechanical pump from an E-450 Ford Diesel van.  Since I have the '89 Crown Vic front dress on the engine I was able to mount the vac pump in place of the deleted air injection pump. 
    17 inches at all times and the brakes were very happy....me too!
    The electric pumps were pricey and had a reputation for noise.  The mech. pump cost $70 or so from Rock Auto and is silent.  Some fabrication is required.

    BB1
     

    Bob, can you share some pics of your setup? I'd love to take a look.

     

     

    2/08/2023 5:25 PM  #6

    Bullet Bob
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    From: Montrose, Colorado
    Registered: 4/01/2013
    Posts: 4,885

    Re: power brake boost

    Raymond, I'll try to get a pic or two and email or text them to you.  My posting here has yet to be perfected.  I made a bracket for it and removed the smog pump delete idler pulley.

    "you get what you pay for, good work isn't cheap, and there are NO free lunches...PERIOD!"
     

    2/10/2023 10:40 PM  #7

    Cab4word67
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    From: Portland, Ore
    Registered: 4/06/2019
    Posts: 1,154

    Re: power brake boost

    Here are my pics after the install of the Leed system. I now have real power brakes like they should be. you can barely hear it run when it comes on.


    Last edited by Cab4word67 (2/10/2023 10:46 PM)

    Slammed Big Blue, ran over the varmints that messed with the Stang. Now all is good in the NW
       •Thread Starter
     

    2/11/2023 8:22 PM  #8

    6sally6
    Hyper FYIFORD ADDICT

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    From: Surfside Beach,SC
    Registered: 4/02/2013
    Posts: 6,849

    Re: power brake boost

    Suhhhhhhhhh-wheat !
    You driving it to the east coast ?!!
    6s6

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

     

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