[urq] Brake pressure regulator

[Maurits Jonkergouw]

I stand corrected.... I only upgraded to G60. The 23.81 mm master cylinder 
AND pressure regulator are both stock. I just noticed this browsing my 
maint. history files and remembered I *should have* upgraded to the 25.4 mm 
master (P/N 447) cylinder instead (yeah, that was a real bummer) but still I 
never locked the rears during panic stops.

>I did the 5000 G60 upgrade and master cylinder upgrade (bigger 23,8 mm P/N 
>443 611 021 also from 5000) but kept/replaced the stock pressure regulator 
>(P/N 803 612 303), and I never locked the rears during emergency stops 
>because of a wrong bias. FWIW.
>
> Regards,
> Maurits
>
> 1986 quattro GV
>
>
>
>
> ----- Original Message ----- 
> From: "milisen " <milisen at hotmail.com>
> To: ""urq" " <urq at audifans.com>
> Sent: Tuesday, July 15, 2008 10:33 PM
> Subject: Re: [urq] Brake pressure regulator
>
>
>>
>>
>> -----Original Message-----
>> From: milisen  <milisen at hotmail.com>
>> Sent: 7/15/2008 4:35:01 PM
>> To: wbremer  <wbremer at maine.rr.com>
>> Subject: RE: [urq] Brake pressure regulator
>>
>>
>> Hi & thanks for the answer,
>>
>> if its not too much bother I'd be glad if you could check the product 
>> number!
>>
>> I'm actually very interested in this option despite I'm trying to keep 
>> the urq original. Has anyone here with an adjustable valve experimented 
>> how the handling changes when you apply more brake power to the back? I 
>> suppose left foot braking works really nicely with more power to the 
>> back! Talking of...has anyone
>> dared to try left foot braking with the urq?
>>
>> Approximately how much did the valve cost?
>>
>> Cheers,
>> Johan H
>> Helsinki, Finland
>>
>> -----Original Message-----
>> From: wbremer <wbremer at maine.rr.com>
>> Sent: 7/15/2008 1:24:06 AM
>> To: 'milisen ' <milisen at hotmail.com>
>> Subject: RE: [urq] Brake pressure regulator
>>
>>
>> Johan:
>> There are manual, adjustable brake bias valves that are often used in the
>> earlier urqs when someone converts the front brakes from the 
>> single-piston
>> calipers to the double-piston G60 calipers.  When this conversion is 
>> done,
>> the factory front/rear brake bias valve (the one that is leaking on your
>> car) is somewhat dangerous in that the rear brakes can lock up in a panic
>> stop.  A company called Tilton makes them here in the States.  If you 
>> want
>> to investigate that approach, I'll find the model number of the one that 
>> I
>> put on my Euro '82 urq.  It has a handle and five different front/rear 
>> bias
>> positions.  It is an easy install (maybe you need to get one extra short
>> brake line made) and it has worked on my car without problems since 1996.
>> Bill
>>
>> -----Original Message-----
>> From: urq-bounces at audifans.com [mailto:urq-bounces at audifans.com] On 
>> Behalf
>> Of milisen
>> Sent: Monday, July 14, 2008 12:37 PM
>> To: urq at audifans.com
>> Subject: [urq] Brake pressure regulator
>>
>> Hi q-friends,
>>
>> sorry I haven't been that active on the list lately. But now to my 
>> question.
>>
>> after a spirited drive with my -88 MB on the countryside, I noticed that 
>> the
>> brake fluid level was low. I traced the problem to the brake pressure
>> regulator (not sure thats the right name, but it is the device that sits
>> below the brake master cylinder, which divides the pressure between the
>> front and the back in case of a falure)
>>
>> well back to the problem. The pressure regulator seems to be leaking. Has
>> anybody repaired this, or do I have to search for a new one? I suppose 
>> its
>> NLA
>>
>> cheers,
>>
>> Johan H
>> Helsinki, Finland
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>> North American Celebration of the 25th Anniversary for the urquattro: 
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>>
>> Pictures/Polls/Database at: 
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>>
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>> http://audifans.com/shop/
>>
>