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#861181 - 03/19/11 02:49 AM B body brake booster/master  
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MonteC Offline
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MonteC  Offline
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Summerville, SC
Im doing the booster upgrade this weekend and was wondering about the master cylinder as well.

I will be running ls1 brakes out back and c5 corvette brakes up front, would that master cylinder be a worth while swap?

What about the proportioning vavle? Do the B bodies have one? If so would that be worth swapping to?



SMCC
Broken Car Disease
#861239 - 03/19/11 04:12 PM Re: B body brake booster/master [Re: MonteC]  
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MonteC Offline
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MonteC  Offline
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Im going to try the master cylinder and see what happens.



SMCC
Broken Car Disease
#861244 - 03/19/11 04:37 PM Re: B body brake booster/master [Re: MonteC]  
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Minotaur15 Offline
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Minotaur15  Offline
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Manahawkin NJ
On my car, the setup I am in the process of swapping to is a '96 B-body 9C1 master (1.25" bore) on a B-body dual 12" booster, with a Inline Tube disc-disc proportioning valve at the stock location. I also have an adjustable valve inline to the rear brakes as I currently have a bit of a mismatch with too much rear brake. EDIT: Keep in mind that the later B-booster uses a metric thread and your master cylinder lines will need these; I had them custom made by inline for this application. Don over there will be able to best assist you if you were to go this route.

I had been running what amounts to a typical G-body cylinder on a G dual booster. Stopping was quite good over-all without much to compare too. However, I expect to have a better setup when done per the experience of others like Bob M.

Last edited by Minotaur15; 03/19/11 04:40 PM.

Dan - minotaur15@hotmail.com
Used to have: '86 MMC Road Course Ready
2020 Kia Forte GT Manual - Daily Driver
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#861262 - 03/19/11 06:11 PM Re: B body brake booster/master [Re: Minotaur15]  
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MonteC Offline
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MonteC  Offline
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Summerville, SC
I ordered a brake booster and master cylinder from a 1990 caprice.

The booster is larger, I assume it is the 12" dual diaphragm. The master cylinder was larger as well.

I measured the inner diameter above where the snap ring sits to hold the piston in.

Stock measures 1.440, the Caprice unit measures 1.600.

The caprice unit was a direct bolt in, lines where the same thread.



SMCC
Broken Car Disease
#861350 - 03/20/11 03:02 AM Re: B body brake booster/master [Re: MonteC]  
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Big Reazon Offline
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Seattle, Wa
Is it really that bad to run the b body master also on stock brakes?


I eat rice and buid muscle. You add body kits I add racing slicks. My car is fast your car pretends to be fast. I step on the gas you hear my rumble. You step on the gas and it sounds like a bee is near my ear. Just know this you pull up to my car you might as well catch you own car on fire, because they call me the rice burner.
#861355 - 03/20/11 03:19 AM Re: B body brake booster/master [Re: Big Reazon]  
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Monte_ExpreSS Offline
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Oshawa, Ont. Canada
Originally Posted By: Big Reazon
Is it really that bad to run the b body master also on stock brakes?


No, but there is no advantage to it. The pedal throw will just become extremely short & I beleive you will see a reduction in line pressure.

#861357 - 03/20/11 03:30 AM Re: B body brake booster/master [Re: Monte_ExpreSS]  
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PB86SS/87LS Offline
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New Berlin, WI
I used the older b-body (1990 ish) booster and master, both used junkyard units and have been very impressed and as was mentioned, it's a direct swap. I am running b-body/1LE 12" brakes so the bigger booster/MC combo was key. The stopping power/feel is great.


-86'SS 383 CCC QJet- BRF 2004r-8.5" 3.42
-87'LS 350 MAF/SD TPI- CRF 2004r-7.5" 3.42
-81'Grand LeMans Safari Wagon 3.8 2bbl/200C/2.73
-07'TBSS Stockish daily driver
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#861359 - 03/20/11 03:35 AM Re: B body brake booster/master [Re: PB86SS/87LS]  
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BladeOfAnduril27 Offline
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Doylestown, PA
Is there really much gain with the B-body master? I was planning to run b-body booster and g-body master. Is that a good set up, or am I better off going to the b-body master?


~ Matt H.

1988 Monte Carlo SS w/ T-tops, White with gray int, 350, Summit cam, World Torquer S/R heads, Holley St. Dominator intake, Edelbrock 600cfm carb, Champion 3-row alum radiator, ramchargers, 200-r4 with CK Shift Kit, billet servo, 2200 stall, Afterburner headers, Pypes 2.5" with x-pipe, Violator mufflers (stock exit), S10 front brake swap.
#861438 - 03/20/11 03:36 PM Re: B body brake booster/master [Re: BladeOfAnduril27]  
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Minotaur15 Offline
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Minotaur15  Offline
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Manahawkin NJ
Blade,

Refer to Bob M's post in this thread.

http://www.montecarloss.com/community/ub...true#Post592290


Dan - minotaur15@hotmail.com
Used to have: '86 MMC Road Course Ready
2020 Kia Forte GT Manual - Daily Driver
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