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Proportioning valve, part number and how-to


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Proportioning valve, part number and how-to
firefish
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#1

05-18-2009, 05:28 AM
I am getting a 5/33 (correct?) proportioning valve to replace the stock 5/18 as per the recommendations here. Now, do I simply go to the Porsche store and ask for it or do I need a part number or do I go someplace else?

I don't even know where the valve is but I am assuming it is located in the master cylinder. Does replacing it require any special tools or special knowledge or is it a straight forward swap?
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1995 Riviera blue 968CS with LSD, custom LEDA coilovers with t-bar delete, S4 brakes, RS Barn braided lines, Tarett sways, Racers Edge bushings everywhere, Rack Tack, Design 1 braces and short shift kit, air box mod, RS Barn stage 1 chip, RS Barn cat back, RUF BTR2 wheels with Toyo R888, Deutsch Nine TRS version 2 rear wing (carbon fiber), AIR repop splitter (carbon fiber), brake cooling intakes (carbon fiber), Sparco seats and belts, OMP steering wheel and a lot of other little things that I can't recall at the moment...
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flash
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#2

05-18-2009, 04:44 PM
using all search options do a search here on "brake bias valve" and my screenname - it should pop up complete with a list of all of them
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94 Midnight Metallic Blue Cab Porsche 968 w/deviating cashmere/black interior and WAY too many mods to list - thanks to eric for creating www.968forums.com



"It isn't nearly as expensive to do it right as it is to do it wrong."
(This post was last modified: 05-18-2009, 04:45 PM by flash.)
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firefish
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#3

05-25-2009, 04:25 PM
How do you mean "screen name"?
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1995 Riviera blue 968CS with LSD, custom LEDA coilovers with t-bar delete, S4 brakes, RS Barn braided lines, Tarett sways, Racers Edge bushings everywhere, Rack Tack, Design 1 braces and short shift kit, air box mod, RS Barn stage 1 chip, RS Barn cat back, RUF BTR2 wheels with Toyo R888, Deutsch Nine TRS version 2 rear wing (carbon fiber), AIR repop splitter (carbon fiber), brake cooling intakes (carbon fiber), Sparco seats and belts, OMP steering wheel and a lot of other little things that I can't recall at the moment...
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firefish
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#4

05-25-2009, 05:16 PM
I have not succeeded in finding a how-to thread for replacing the valve. If there is one, could someone please point me in the right direction.

I have however found a p/n for a 5/45 valve, paragon lists them for the 911(964): PP-964.355.305.00 Is this the correct 5/45 valve?
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1995 Riviera blue 968CS with LSD, custom LEDA coilovers with t-bar delete, S4 brakes, RS Barn braided lines, Tarett sways, Racers Edge bushings everywhere, Rack Tack, Design 1 braces and short shift kit, air box mod, RS Barn stage 1 chip, RS Barn cat back, RUF BTR2 wheels with Toyo R888, Deutsch Nine TRS version 2 rear wing (carbon fiber), AIR repop splitter (carbon fiber), brake cooling intakes (carbon fiber), Sparco seats and belts, OMP steering wheel and a lot of other little things that I can't recall at the moment...
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S_Cal968
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#5

05-25-2009, 05:17 PM
<!--quoteo(post=72519:date=May 25 2009, 12:25 PM:name=firefish)-->QUOTE (firefish @ May 25 2009, 12:25 PM) <{POST_SNAPBACK}><!--quotec-->How do you mean "screen name"?<!--QuoteEnd--><!--QuoteEEnd-->
Search on "Flash"

See:
P/Valve Thread Link
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(This post was last modified: 05-25-2009, 05:24 PM by S_Cal968.)
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firefish
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#6

08-14-2009, 03:33 AM
Did this swap yesterday . no fun at all. Haven't tried it out yet but will today.
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1995 Riviera blue 968CS with LSD, custom LEDA coilovers with t-bar delete, S4 brakes, RS Barn braided lines, Tarett sways, Racers Edge bushings everywhere, Rack Tack, Design 1 braces and short shift kit, air box mod, RS Barn stage 1 chip, RS Barn cat back, RUF BTR2 wheels with Toyo R888, Deutsch Nine TRS version 2 rear wing (carbon fiber), AIR repop splitter (carbon fiber), brake cooling intakes (carbon fiber), Sparco seats and belts, OMP steering wheel and a lot of other little things that I can't recall at the moment...
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Cloud9...68
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#7

08-14-2009, 08:47 PM
I'll be interested to see your impression. I installed mine as I was very much a beginner track driver, and I can't saw I noticed any difference. Maybe I would have noticed an improvement farther along in my track driving "career," but as it was, I couldn't feel any change in car's braking attitude.
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flash
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#8

08-14-2009, 10:31 PM
really? you didn't notice the reduction in nose dive?

go drive a standard car and then hop back in yours - i'm betting you'll notice it
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94 Midnight Metallic Blue Cab Porsche 968 w/deviating cashmere/black interior and WAY too many mods to list - thanks to eric for creating www.968forums.com



"It isn't nearly as expensive to do it right as it is to do it wrong."
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Cloud9...68
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#9

08-15-2009, 06:37 PM
Probably so. But when I installed the proportioning valve, I was still very much in the "deer in the headlights" phase of my track driving learning curve. I could have let half the air out of my two front tires, installed the donut on one of the rears, sawed my front sway bar in half, removed one of the rear brake calipers, and installed a supercharger, and I wouldn't have noticed any difference in the way the car drove. I was too busy looking in the rear view mirror watching all the VW Golfs and Mini Coopers pass me like I was stuck in reverse Thank goodness those days are behind me.
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(This post was last modified: 08-15-2009, 06:37 PM by Cloud9...68.)
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firefish
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#10

08-16-2009, 03:13 AM
What about the mini's and golf's - are they behind you too now? [img]style_emoticons/<#EMO_DIR#>/biggrin.gif[/img] [img]style_emoticons/<#EMO_DIR#>/tongue.gif[/img]
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1995 Riviera blue 968CS with LSD, custom LEDA coilovers with t-bar delete, S4 brakes, RS Barn braided lines, Tarett sways, Racers Edge bushings everywhere, Rack Tack, Design 1 braces and short shift kit, air box mod, RS Barn stage 1 chip, RS Barn cat back, RUF BTR2 wheels with Toyo R888, Deutsch Nine TRS version 2 rear wing (carbon fiber), AIR repop splitter (carbon fiber), brake cooling intakes (carbon fiber), Sparco seats and belts, OMP steering wheel and a lot of other little things that I can't recall at the moment...
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Cloud9...68
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#11

08-19-2009, 10:13 PM
<!--quoteo(post=77939:date=Aug 16 2009, 01:13 AM:name=firefish)-->QUOTE (firefish @ Aug 16 2009, 01:13 AM) <{POST_SNAPBACK}><!--quotec-->What about the mini's and golf's - are they behind you too now? [img]style_emoticons/<#EMO_DIR#>/biggrin.gif[/img] [img]style_emoticons/<#EMO_DIR#>/tongue.gif[/img]<!--QuoteEnd--><!--QuoteEEnd-->
I imagine so, along with some considerably faster cars, not to brag. Track driving was initially a very frustrating experience for me, as I was routinely THE slowest car in my (beginners) group. But then I enrolled in a local driving academy, which emphasizes a lot of seat time, and it finally started to click.
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Dubai944
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#12

08-22-2009, 10:46 AM
I just bought a couple of different valves to try on my race car. One thing I can tell you is that Part Number 965.355.305.01 is a 5/60, not the 5/45 I thought I was getting.... [img]style_emoticons/<#EMO_DIR#>/tongue.gif[/img]
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flash
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#13

08-22-2009, 11:29 AM
yup, as per the list i posted, the one you wanted was 930, not 965 - the rest of the numbers are correct
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94 Midnight Metallic Blue Cab Porsche 968 w/deviating cashmere/black interior and WAY too many mods to list - thanks to eric for creating www.968forums.com



"It isn't nearly as expensive to do it right as it is to do it wrong."
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