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03-04-2009, 11:25 PM
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#1 |
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Registered User
Join Date: Feb 2009
Location: )(*&)(*&*&*&^%$
Posts: 51
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Brake booster quick question
Is the booster the same for drums and discs? My booster has a vacuum leak and needs to be replaced. Problem is, I wanna switch to front discs soon. So can I replace the booster and then switch to disc and be ok?
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03-04-2009, 11:29 PM
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#2 |
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Registered User
Join Date: Apr 2000
Location: Bonne Terre, Mo
Posts: 3,005
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Re: Brake booster quick question
Yes same. Difference is valve on the side of the master cylinder.
__________________
'69 Chevy Long Fleet & '71 GMC Short Step & Project "ODD BALL" "You can wash a pig, soak it in most expensive perfume. In the end it is still just a pig." ODD BALL build thread http://67-72chevytrucks.com/vboard/s...d.php?t=478629" |
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03-05-2009, 12:10 AM
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#3 |
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Registered User
Join Date: Feb 2009
Location: )(*&)(*&*&*&^%$
Posts: 51
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Re: Brake booster quick question
tyvm
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03-05-2009, 12:42 AM
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#4 |
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Registered User
 
Join Date: Oct 2005
Location: Sacramento, CA
Posts: 1,970
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Re: Brake booster quick question
I concur.....I'm running 4 WDB with stock vacuum booster and Corvette style master cylinder.
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72 Cheyenne SWB Fleet Nut & bolt frame off in progress...99.9999% - supercharged 383 - 4 wheel discs - relocated fuel tank -  My Build Thread |
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03-05-2009, 01:12 AM
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#5 | |
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Registered User
Join Date: Sep 2001
Location: Hacienda Heights, California USA
Posts: 474
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Re: Brake booster quick question
Quote:
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'72 GMC custom camper 350/350 |
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03-05-2009, 09:27 AM
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#6 |
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Registered User
Join Date: Feb 2009
Location: )(*&)(*&*&*&^%$
Posts: 51
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Re: Brake booster quick question
Spinning wheels: to be honest, I really don't know where it's leaking! I think it's the booster diaphram because my engine dies when I'm coming to a stop. Also, when I mash the brake pedal, it makes a swooshing sound.
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03-05-2009, 10:49 PM
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#7 | |
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Registered User
Join Date: Sep 2001
Location: Hacienda Heights, California USA
Posts: 474
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Re: Brake booster quick question
Quote:
It was missing the seal, about a $1 part. The hard part was chasing down what part was bad, as I changed booster, master cylinder, proportioning valve and added speed bleeders. Next time, I'll change one thing at a time  Also, check your valve going into the booster. That little white plastic thingy, (my technical term), were you hookup the vacuum line from the engine. On yeah, you are getting around 15 inches of vacuum to the booster, right? Big cams will kill your vacuum.
__________________
'72 GMC custom camper 350/350 |
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03-05-2009, 01:18 AM
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#8 |
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Registered User
Join Date: Aug 2006
Location: spokane, washington
Posts: 37
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Re: Brake booster quick question
I've been told on this forum that they were different. Something that has to do with the push rod going into the back of the master cyl. Huh, I guess I can just try it. ED67C20
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03-05-2009, 02:02 AM
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#9 |
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Registered User
Join Date: Oct 2008
Location: oxnard ca
Posts: 2,201
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Re: Brake booster quick question
the bore size on the master
are diffrent disc and disc 1 1/8 bore disc and drum 1 inch bore justin www.scottshotrods.com |
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03-06-2009, 12:56 AM
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#10 |
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Registered User
Join Date: Feb 2009
Location: )(*&)(*&*&*&^%$
Posts: 51
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Re: Brake booster quick question
Soon as I remove it I'll have it tested. Thanx for all the input!!!
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03-07-2009, 05:59 PM
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#11 |
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Registered User
Join Date: Aug 2006
Location: spokane, washington
Posts: 37
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Re: Brake booster quick question
Row, I have tested them before with one of those mityvac vacuum pumps. As long as it will pump vacuum and hold it you should be O.K. I have another car with a bad booster. It will be idling perfect until I press on the brake pedal. It makes a hissing sound then it causes a vacuum leak to the motor making a rough idle. ED67C20
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