wilwood proportioning valve adjustment
Thread Starter
Member
iTrader: (5)
Joined: Jan 2006
Posts: 366
Likes: 0
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?
Member
iTrader: (3)
Joined: Feb 2005
Posts: 118
Likes: 0
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.
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.
Thread Starter
Member
iTrader: (5)
Joined: Jan 2006
Posts: 366
Likes: 0
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.
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.
Member
iTrader: (3)
Joined: Feb 2005
Posts: 118
Likes: 0
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.
Joined: Aug 2006
Posts: 12,812
Likes: 110
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
Member
iTrader: (2)
Joined: Apr 2003
Posts: 327
Likes: 0
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..
Thread
Thread Starter
Forum
Replies
Last Post
Hotrodboba400
Firebirds for Sale
3
Dec 10, 2019 07:07 PM
dimented24x7
Tech / General Engine
4
Sep 6, 2015 03:51 PM
Hotrodboba400
Firebirds for Sale
0
Sep 2, 2015 07:28 PM








