944Hybrids: 924/944/968 and 928 V8 Conversions
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HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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Porsche Brake bias used on hydroboost installs or no?

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Porsche Brake bias used on hydroboost installs or no?  Empty Porsche Brake bias used on hydroboost installs or no?

Post  zeusrotty on Tue Apr 04, 2017 12:40 am

You guys that are running the 944 master with the adapter and Ford hydroboost... are you running the 944 cylinder brake valve directly out of the master for the rear brakes or no? Porsche Brake bias used on hydroboost installs or no?  Img_1410

Reason I ask is I'm having issues with my pedal being very soft and going to the floor with a new hydroboost and master installed. Going to bench bleed the master (while in the car) today and just want to make sure I'm not fighting an uphill battle if I'm not using the right parts. I am also using a tilton proportioning valve FYI.

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Post  fantic on Tue Apr 04, 2017 7:03 am

My 86 NA didn't have this valve so it's not on there. I had to search to see what it is. I guess it's only on turbo and S models. I have been really pleased with the braking of this set up. Maybe someone with a turbo that has one will chime in.

fantic

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Post  Rich L. on Tue Apr 04, 2017 10:54 am

With or without hydroboost, a prop valve with the Porsche master is a good setup. My '87 n/a didn't have one either but I added the turbo one when I upgraded to M030 calipers front and back.

But Zeus, you probably won't need / don't want two prop valves in the system. Your issues does sound more like a fluid problem than a hardware one. The bench bleed should do it.

Rich
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Post  zeusrotty on Wed Apr 05, 2017 12:26 am

Thanks for the input. I didn't get to it today because my dog had to be put down so I'll probably do it next week. Rough day.

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Post  Rich L. on Wed Apr 05, 2017 9:53 am

Oh! Sorry to hear that, Man. Hang in there.
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Post  948 on Tue Apr 11, 2017 9:16 pm

If you car originally had a prop valve, keep it.
Not sure this would cause a sinking pedal, sounds like a bad MC or one that needs bleeding.
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