Power brake MS Q? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

67ChevyRedneck · 06-29-2005, 12:33 PM

I have a curious question for someone who may know the answer. If you look at a master cylinder for a non-power brake truck it sits level and flush with the firewall. Does anyone know why the Power master cylinder angles downward into the engine bay? My only guess would be so that you could never completely fill it full of fluid (due to the angle)? GM must have had some sort of reasoning behind this. Anyone have any clues?

Edit: Edited so Putter would no longer be confused

Putter · 06-29-2005, 12:58 PM

I had to scratch my head a few times to figure out if you meant a Microsoft question or a Mississippi question (Both are MS). Then it hit me that you meant Master Cylinder.
I have wondered that myself. Especially on some of the older muscle cars. They angle upward at a pretty harsh angle.

67ChevyRedneck · 06-29-2005, 02:21 PM

I edited it for ya putter! It just might be one of the great mysteries of the universe, like which came first, the chicken or the egg??? The world will never know, unless someone posts an answer!

When I first added the power brakes to my 67 I took the booster/master cylinder back off twice 'cause I thought I put it together wrong, then I went back the junkyard to take a peek at a couple trucks, thinking I was missing a braket or maybe you have to modify it to work on a 67, but NOPE, the several trucks I saw all had the funky angle. Been on my truck for almost 2 years and the brakes work awesome.

fastwillie 696969 · 06-29-2005, 04:36 PM

i belive these m/c were in angled for any air bubbles to run up and not stay in the m/c piston area so if there is any self made bubbles it would bleed off into the resvuior

67ChevyRedneck · 06-29-2005, 04:51 PM

I thought that's what the rubber things were for.... the suck down to the fluid level to create a vacuum, so there is not space for air??? Once again, I don't know that for sure, just my observation

farside847 · 06-29-2005, 07:37 PM

"how many licks to the center of a tootsie pop? CHRUNCH! The world may never know."

06-29-2005, 12:33 PM	#1
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Power brake MS Q? I have a curious question for someone who may know the answer. If you look at a master cylinder for a non-power brake truck it sits level and flush with the firewall. Does anyone know why the Power master cylinder angles downward into the engine bay? My only guess would be so that you could never completely fill it full of fluid (due to the angle)? GM must have had some sort of reasoning behind this. Anyone have any clues? Edit: Edited so Putter would no longer be confused __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! Last edited by 67ChevyRedneck; 06-29-2005 at 02:18 PM.

06-29-2005, 12:58 PM	#2
Putter More Cowbell.... Join Date: Mar 2004 Location: Puckett, MS Posts: 3,569	I had to scratch my head a few times to figure out if you meant a Microsoft question or a Mississippi question (Both are MS). Then it hit me that you meant Master Cylinder. I have wondered that myself. Especially on some of the older muscle cars. They angle upward at a pretty harsh angle. __________________ *There once was a member from Puckett.....Who ( fill in the blank blank blank* ) bucket** Last edited by Putter; 06-29-2005 at 12:59 PM.

06-29-2005, 02:21 PM	#3
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	I edited it for ya putter! It just might be one of the great mysteries of the universe, like which came first, the chicken or the egg??? The world will never know, unless someone posts an answer! When I first added the power brakes to my 67 I took the booster/master cylinder back off twice 'cause I thought I put it together wrong, then I went back the junkyard to take a peek at a couple trucks, thinking I was missing a braket or maybe you have to modify it to work on a 67, but NOPE, the several trucks I saw all had the funky angle. Been on my truck for almost 2 years and the brakes work awesome. __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! Last edited by 67ChevyRedneck; 06-29-2005 at 02:24 PM.

06-29-2005, 04:36 PM	#4
fastwillie 696969 ~Rest In Peace~ Join Date: May 2005 Location: CALIFORNIA NOR CAL Posts: 9,707	i belive these m/c were in angled for any air bubbles to run up and not stay in the m/c piston area so if there is any self made bubbles it would bleed off into the resvuior __________________ is it fast ? it has a lighting bolt donut? B___H please, I can remove 90% of your so called "beauty" with a kleenex

06-29-2005, 04:51 PM	#5
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	I thought that's what the rubber things were for.... the suck down to the fluid level to create a vacuum, so there is not space for air??? Once again, I don't know that for sure, just my observation __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications!

06-29-2005, 07:37 PM	#6
farside847 Registered User Join Date: Feb 2005 Location: Bay Area, California Posts: 995	"how many licks to the center of a tootsie pop? CHRUNCH! The world may never know." __________________ 1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree



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