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wilwood proportioning valve adjustment

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Old Mar 8, 2010 | 11:19 AM
  #1  
drperformance's Avatar
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From: Pittsburgh
Car: 1987 firebird
Engine: 1995 lt1 383
Transmission: 4l60e
Axle/Gears: moser 9" with 3.70
wilwood proportioning valve adjustment

I just gutted the rear portion of my stock combination valve and installed a Wilwood rotory style proportioning valve. My question is where does everyone have theirs set?
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Old Mar 8, 2010 | 11:29 AM
  #2  
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From: CU, IL
Car: 89 Camaro RS
Engine: Carb'd 350
Transmission: 700r4
Axle/Gears: 3.70
Re: wilwood proportioning valve adjustment

This is from the Tech Article under Brakes
https://www.thirdgen.org/propvalve

Dial-In:

Driving the car now, with the rears getting full line pressure, will cause the rears to lock much before the fronts. Test the car on short hops, preferably on some loose surface (so they'll lock more easily and not flat spot your tires), and back the adjuster **** out on turn at a time at first, and then by half turns, until the rears lock just after the fronts do.
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Old Mar 8, 2010 | 11:45 AM
  #3  
drperformance's Avatar
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From: Pittsburgh
Car: 1987 firebird
Engine: 1995 lt1 383
Transmission: 4l60e
Axle/Gears: moser 9" with 3.70
Re: wilwood proportioning valve adjustment

Thanks that helps. But I am currious where everyone found theirs to be the best spot.

I am also crazy and totaly over thinking it but when I bleed the brake it seemed that I got more fluid out when the valve was adjusted to decrease flow by 57% (min flow). I know about the whole volume vs velocity thing and this valve only decreases flow. But I thought that it would be the other way around??

Anyhow I did bence bleed the master two times and pulled about a quart of fluid out of the rear bleeders. I guess I will find out in the spring.
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Old Mar 8, 2010 | 12:00 PM
  #4  
Mgb86's Avatar
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From: CU, IL
Car: 89 Camaro RS
Engine: Carb'd 350
Transmission: 700r4
Axle/Gears: 3.70
Re: wilwood proportioning valve adjustment

I have never had the master off my car so I have never Bench Bleed it before. I mounted my proportioning valve just in front and to the right of the master. I haven't touched it sense I set it 3 years ago when I put in the posi with disc rearend.
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Old Mar 8, 2010 | 06:20 PM
  #5  
//<86TA>\\'s Avatar
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From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: wilwood proportioning valve adjustment

put it in the middle and see how it works, adjust as needed. If you can do the testing on a gravel road, try to get the rear brakes to look up just after the fronts, not before. its easier on a gravel road because you wont wreck your tires
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Old Mar 8, 2010 | 07:20 PM
  #6  
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From: Beloeil, Quebec
Car: IROC-Z
Engine: LSx
Transmission: T56
Axle/Gears: Fabbed 9"
Re: wilwood proportioning valve adjustment

Custom made a bracket, and attached it to my strut mount.
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Old Mar 18, 2010 | 10:23 PM
  #7  
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From: Manahawkin/Hackensack, NJ
Car: 1987 IROC-Z
Engine: 305 LB9
Transmission: 5 Speed
Axle/Gears: 3.70 Posi BW 9 Bolt
Re: wilwood proportioning valve adjustment

WOW talk about a clean engine compartment you could eat off that..
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