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Volks-Swap :: Suspension :: Brakes Swap and Prop Valve



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SportyBug
03:50:06 Sun
Sep 16 2007

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Dreamer

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Brakes Swap and Prop Valve

I dont know where else to put this, if it needs to be moved it can.

Ok I have an idea in my head that I am wondering what people will think and if it will work.

When it comes to swapping on disc brakes on to our bugs (like a 944 setup front and rear) we have to do something about making sure that there is right amount of bias between the front and rear brakes. So would it be possible to use the prop valve from a car that came with front and rear discs but no abs? The cars that I have in mind would be 91-01 RS Integras and the Civics Si since those cars dont have abs.

So tell me, what do you think? Would it, could it work?

  
EVIL_GRIM
18:50:38 Wed
Oct 3 2007

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Re: Brakes Swap and Prop Valve

what about a 68-82 chevy corvette. they have a beefy looking prop valve, and it has the brake switch when you lose pressure :biggrin: hopefully nobody loses pressure to the point of needing the light lol

  
SportyBug
20:52:03 Sun
Oct 7 2007

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Re: Brakes Swap and Prop Valve

The reason I was thinking about the honda/acura ones was the fact that the cars are "close" to the size and weight of the vw's. Well, close enough anyway. And the fact that the prop valve is a nice and compact part that wouldnt take up much room. The big thing is would this thing work?


  
SportyBug
16:58:38 Mon
Oct 15 2007

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Re: Brakes Swap and Prop Valve

If I understand what I have read correctly this valve has a 40/40 bais

  
DOCS_69_GHIA
07:18:49 Mon
Jun 7 2010

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Re: Brakes Swap and Prop Valve

You might want to look at this solution Audi used on 84-88 Audi 200 and 5000 sedans. The car weighs 2400 to 2800 pounds depending on model. A brake pressure regulator is incorporated in the rear brake hydraulic circuit to reduce the possibility of the rear wheels locking under heavy braking. It is connected by a spring to the rear axle cross beam that actuates the valve as the rear of the vehicle rises as nose dive increases. Haynes manual 15026 is the source for this information.

  
thummmper
02:41:19 Tue
Nov 8 2011

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Almost Serious

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Re: Brakes Swap and Prop Valve

3 years later

  
EG33
01:28:11 Mon
Jun 11 2012

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Dreamer


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Re: Brakes Swap and Prop Valve

Old post CPR


Is a "adjustable" proportioning valve not going to work? I've never used one before.

(I hoping so), I have a Willwood PV that I'll be using on my rear disks (front drums). Yes, if you only had disks on one end, the rear isn't the place.. But they came with the micro-stub axles I need to reduce my CV angle.. I would have been fine with drums all the way around. I'm not running a road course. I just need to come to a stop once.. /8o]

I think the valve was $45. You would think that you would be able to "fix" it's position? I would hate for a someone not familiar to think they just turned the heater on? j8oO Once I get it set right (and it actually does the job) I'm going to safety wire the knob in place... just in case. If it got moved that would be one rude surprise, (ya think?)

Willwood excerpt
Proportioning Valve, Knob Style.




The new generation of adjustable proportioning valves combines the latest refinements to deliver precise pressure metering and strength from a compact forged billet design. Pressure adjustments range from 100-1000 PSI and provide for a maximum decrease of 57% in line pressure, the most of any available valve. Adjuster knob with fine thread tuning provides precise pressure adjustment. This adjustment lets you fine tune the front to rear braking balance by proportionally decreasing the rear brake line pressure. Valves weigh only 5.2 ounces and have two .25 side mounting holes spaced 1.00 apart. This valve varies from our standard Knob Style Proportioning valve, as the in and out ports are 3/8-24 inverted flare seats and do not require tube nut adapters to directly install 3/8 tubing with inverted flare 3/8-24 nuts.


Cheers
Randy, Long Beach, Ca. USA!

  

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