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brake proportion valve & Road racing

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Old Jun 3, 2008 | 10:30 PM
  #1  
Parts4sale's Avatar
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brake proportion valve & Road racing

Would you only need one? and would this be a better idea then runing a stock type prob block? does anyone on here run something like this? if so how do you have the cars line presser front/back set up for road racing or auto x....
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Old Jun 4, 2008 | 06:42 PM
  #2  
iansane's Avatar
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From: Tacoma, Wa
Car: '91 TA vert
Engine: turboLSx
Transmission: T56
Axle/Gears: 3.23
Re: brake proportion valve & Road racing

4thgen master. The front is plumbed to a T (actually my line lock) so it sees 100% pressure and the rears are plumbed through a wilwood adjustable prop valve.
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Old Jun 4, 2008 | 08:26 PM
  #3  
SDIF's Avatar
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From: Aiken, SC
Car: 91 Z/28, 89 RS Race Car
Engine: 305 stock / ZZ4 AFR 195 9.7:1
Transmission: T5 / t10 / Jerico
Axle/Gears: 10blt w 3.42, 9 in w /3.80 DL
Re: brake proportion valve & Road racing

Only replace the stock set up if you are experiencing rear lock prior to front.

The less you change the happier you will be.

I have two master cylinder with a balance bar and an inline rear prop valve.

Balance is no better than the stock set up when properly dialed in. When not dialed in it can be a terrible.
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Old Jun 5, 2008 | 10:33 PM
  #4  
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Re: brake proportion valve & Road racing

Originally Posted by iansane
4thgen master. The front is plumbed to a T (actually my line lock) so it sees 100% pressure and the rears are plumbed through a wilwood adjustable prop valve.
thats kinda what i wanted to do
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Old Jun 5, 2008 | 10:38 PM
  #5  
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Re: brake proportion valve & Road racing

Originally Posted by SDIF
Only replace the stock set up if you are experiencing rear lock prior to front.

The less you change the happier you will be.

I have two master cylinder with a balance bar and an inline rear prop valve.

Balance is no better than the stock set up when properly dialed in. When not dialed in it can be a terrible.
right now i have 10" rotors and sinlge psiton cailpers on all 4 conners and a stock block i plan to switch to c5 brakes soon but
ivs seen cars like this lock the fronts up heading into a conner or bank.
and iv done this before also so i was kicking around the idea like the one above what do you think? you think id have mor problems with something adjsutabile?
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Old Jun 6, 2008 | 11:58 PM
  #6  
SDIF's Avatar
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Joined: Oct 2003
Posts: 544
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From: Aiken, SC
Car: 91 Z/28, 89 RS Race Car
Engine: 305 stock / ZZ4 AFR 195 9.7:1
Transmission: T5 / t10 / Jerico
Axle/Gears: 10blt w 3.42, 9 in w /3.80 DL
Re: brake proportion valve & Road racing

What are you going to run on the rear?

You would rather have the fronts lock before the rears.

I would still try it as is with the new brakes, before making any changes
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Old Jun 9, 2008 | 09:22 PM
  #7  
ws6transam's Avatar
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From: Haslett, MI
Car: 1984 Trans Am WS6
Engine: Minirammed 385, 396 RWHP
Transmission: T56
Axle/Gears: 3.73 Moser 12-bolt
Re: brake proportion valve & Road racing

Try switching to different brake pad compounds before noodling with a bias valve. I just put in some Hawk HP+ pads and found religion.
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