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Posted by: jimkelly Apr 8 2010, 08:03 PM

i was wondering?

jim

Posted by: URY914 Apr 8 2010, 08:22 PM

No one should be.

Posted by: underthetire Apr 8 2010, 09:37 PM

Masters are easy to re-build, but the seals kit are not available any more.

Posted by: Cap'n Krusty Apr 8 2010, 09:38 PM

No one in their right mind. Or, maybe, no one without massive liability insurance.

The Cap'n

Posted by: realred914 Apr 9 2010, 10:50 AM

i believe it is PMB that does 914 brake work, i know they do the calipers, give them a call. I dont have his number right now. sorry

or suggest you call rich at 650 364-6234 and see what he has to offer. he does sell the calipers that PMB rebuilds so he should know.

Posted by: 914Sixer Apr 9 2010, 11:35 AM

Proportioning valves can be redone by Wilhoit Restorations in Long Beach, Ca, They do mostly 356 stuff but advertise redoing prop valves.

Posted by: realred914 Apr 9 2010, 11:46 AM

they are no fly by night outfit either, they have a very good reputation in the 356 world

Posted by: Rico Suave Apr 9 2010, 12:19 PM

Take the P-Valve out and put in a tee from a VW squareback....go with a new 19mm 911 master. They are cheap.

Posted by: URY914 Apr 9 2010, 01:20 PM

As Mr Suave said........

Posted by: streetrover Apr 11 2010, 12:12 PM

Just curious . . . what EXACTLY do these proportioning valves do? What happens if you eliminate the valve (as shown in the pix posted by URY914)?

Posted by: Rico Suave Apr 11 2010, 06:30 PM

65/35 or thereabouts bias to the front. Keeps the rears from locking up before the fronts, which is a BAD thing. Removing the valve brings it closer to 50/50 as the front brake pads are larger than the rears.

Going to bigger calipers on the fronts is good thing with the valve removed.

Posted by: McMark Apr 12 2010, 12:35 AM

Technically speaking, it doesn't proportion anything. It's a limit valve. It keeps the pressure that's going to the rear brakes from rising above a certain level, whereas the fronts are free to keep rising. At low brake pressures you have the same pressure at the front as you do at the rear. A true proportioning valve would mean less pressure to the rears even as low levels.