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Author
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Topic: Brake Booster vacuum question
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Mpcoluv
Gearhead Posts: 446
From: Charlotte NC usa
Registered: Apr 2001
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posted 03-19-2002 10:50 AM
   
Hi Guys,
What is the minimum manifold vacuum htat power brakes will work well with? How low can you go with a vacuum canister?
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SteveLaRiviere
Administrator Posts: 24286
From: Saco, Maine Toys: '70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150
Registered: May 99
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posted 03-19-2002 01:51 PM
I believe around 12" Hg because they do need to allow for safe braking with poorly running stock engines.------------------
'70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
MCA Member # 47773
Civilization is a limitless multiplication of unnecessary necessities. -- Mark Twain
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Dave Gibson
Moderator Posts: 5794
From: Pensacola, Florida, USA M&M#166 MCA#47921
Registered: Aug 99
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posted 03-19-2002 06:17 PM
Yup, 12 to 14 is what you need.   Dave & Terri ------------------
Poison Ivy (Dave's)
'65 Fastback Modified 289 4V, C-4, dual exhaust, styled steel wheels, rally pac, A/C
Blue Belle (Terri's)
'66 Coupe, Silver Blue Metallic, 351W 2-V, 4 speed, A/C, future sleeper.
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Mpcoluv
Gearhead Posts: 446
From: Charlotte NC usa
Registered: Apr 2001
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posted 03-19-2002 07:31 PM
Well, can I get by with 10.5" of vacuum and a vacuum canister?
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SteveLaRiviere
Administrator Posts: 24286
From: Saco, Maine Toys: '70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150
Registered: May 99
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posted 03-19-2002 08:07 PM
Sure, as long as you have a vacuum canister. They also have vacuum pumps. You may even be able to find one in a junkyard on a diesel powered vehicle.------------------
'70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
MCA Member # 47773
Civilization is a limitless multiplication of unnecessary necessities. -- Mark Twain
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70 Pony
Gearhead Posts: 1769
From: Glenmoore, PA, USA
Registered: Jan 2000
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posted 03-20-2002 09:31 AM
After changing my cam...my power brakes were no where....
Installed Crane's Vacuum reserve cannister, and now I can stop......
Pretty sure it was about a $40 or $50 item.
Like Steve said though, there are some "Bone yard" pumps out there...------------------
EDDIE D
Resto Mod '70 Sport Roof
Arrest Me Red
'02 GT, Torch Red
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