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How much vacuum(volume) does the brakes need

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Old Aug 23, 2003 | 02:21 PM
  #1  
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Daz
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Car: 87 Camaro
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How much vacuum(volume) does the brakes need

I am running a big cam and the power brakes are barely working.I have a Cadillac pump that I can use.Now is it possible to just ahava tee on the power booster vacuum line heading to the intake straight to the pump?Or do I need a reservoir(can)?If I do any ideas on how to make it?(a drwaing would be a great)The Cadi pump has its own regulator so wiring would be a lot simpler

Daz
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Old Aug 23, 2003 | 04:53 PM
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Car: 2005 Subaru STI
Engine: 153ci of Turbo Power!
Transmission: 6-Speed
Hey Daz,

For what it's worth I have my vacuum pump going straight to my brake booster ... not T's, no Anything (except a vacuum switch that turns the pump off when a certain vacuum is reached). I capped the port on the intake. I bought a vacuum reserve canister that I was going to plumb in-line but I didn't need it. You might - because of the Caddy pump ... but I didn't need it with the SSBC pump.

Tim
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Old Aug 23, 2003 | 05:33 PM
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From: Mostly in water off So. Cal
Car: '87 Chev
Engine: 60*V6
Transmission: DY T700
Booster vacuum pressure should be min. 18 lb/in. for good boost
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Old Aug 23, 2003 | 06:06 PM
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Daz
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Originally posted by TRAXION
Hey Daz,

For what it's worth I have my vacuum pump going straight to my brake booster ... not T's, no Anything (except a vacuum switch that turns the pump off when a certain vacuum is reached). I capped the port on the intake. I bought a vacuum reserve canister that I was going to plumb in-line but I didn't need it. You might - because of the Caddy pump ... but I didn't need it with the SSBC pump.

Tim
Tim,

Do you mind giving me info on the vacuum reserve canister and the SSBC pump that you have.Ive one seen a few.You can also sell me your canister for cheap..hehe..BTW Im also looking into Hydro -Boosts but theyre pricey..Thanks

Daz

Daz
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Old Aug 23, 2003 | 07:48 PM
  #5  
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From: Maryland
Car: 2005 Subaru STI
Engine: 153ci of Turbo Power!
Transmission: 6-Speed
Daz,

PN 28146 from stainless steel brakes corp. $245. Picture is below.

The canister is black powdercoated aluminum from CompCams. (PN5200). I'm going to hang onto it since it's brand new and is too cheap to sell.

Tim
Attached Thumbnails How much vacuum(volume) does the brakes need-14.jpg  
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Old Aug 25, 2003 | 12:50 PM
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From: Lo$t Angele$
Car: 1987 Chevy Camaro Z28
Engine: 305, 4bbl, A/C, T-Tops
Transmission: 700R4 4speed Automatic
How about converting/adapting to a Hydro-Boost system?
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Old Aug 25, 2003 | 06:52 PM
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Daz
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Car: 87 Camaro
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Originally posted by Tibey
How about converting/adapting to a Hydro-Boost system?
how about it??

Daz
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Old Sep 7, 2003 | 12:27 PM
  #8  
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From: Milwaukee, Wisconsin
Car: 87 Iroc Z28
Engine: 355 TPI
Transmission: T56
Daz,

Do you have any info on that caddy pump? I would like to put a pump in my car but dont really want to spend the money for the SSBC one.

Thanks,
Kevin
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Old Sep 10, 2003 | 12:14 PM
  #9  
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Car: 91 Red Sled
Axle/Gears: 10bolt Richmond 3.73 Torsen
Originally posted by Tibey
How about converting/adapting to a Hydro-Boost system?
Wasn't they hydraboost a system that worked inline with your power steering pump? If this is the system I'm thinking it is then it should work.
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Old Sep 10, 2003 | 01:01 PM
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From: Tuscaloosa, AL
Car: 91Z, 91RS, '84 Jimmy
Engine: L98, 355, L98
Transmission: 700R, T56, 700R4
They used a hydraulic booster in some of the full-size trucks and vans. I personally don't like the design, because there are a lot of fittings to leak, it puts more strain on the PS pump (especially in parking lots where you are braking and turning at low speeds a lot,) and if you break a belt, you can't turn OR stop. You could make it fit, but why? A vacuum pump would have less mess, better reliability, and probably about the same cost as swapping in a used hydro-booster. And then when the hydro system breaks, good luck finding parts.
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