 23 mm Master cylinder?, From a 930? |
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| HalfMoon |
 Oct 31 2017, 08:46 PM
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#1
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Senior Member  Group: Members Posts: 828 Joined: 13-November 12 From: Shenandoah Junction, WV Member No.: 15,144 Region Association: MidAtlantic Region  |
A friend of mine who owns a race shop that does alot of Porsche work said when queried about reducing travel on the 914 brake system that the 23mm master cylinder from a 930 would far better reduce the travel over a 19mm master cylinder.
Has anyone done this mod and if so, what were the performance gains/differences? Thanks D |
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| Mike Bellis |
Oct 31 2017, 10:39 PM
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#2
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Resident Electrician Group: Members Posts: 8,346 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None 
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I'm running a 23 but I also have 930 brakes. It is a very stiff pedal. Not easy to modulate but I can put your head through the windshield if I slam on the brakes...
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| HalfMoon |
Oct 31 2017, 10:56 PM
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#3
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Senior Member Group: Members Posts: 828 Joined: 13-November 12 From: Shenandoah Junction, WV Member No.: 15,144 Region Association: MidAtlantic Region |
QUOTE(Mike Bellis @ Nov 1 2017, 12:39 AM)  I'm running a 23 but I also have 930 brakes. It is a very stiff pedal. Not easy to modulate but I can put your head through the windshield if I slam on the brakes... Thank you for your report based in actual experience :-) |
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Posts in this topic
HalfMoon 23 mm Master cylinder? Oct 31 2017, 08:46 PM
Vacca Rabite
A friend of mine who owns a race shop that does a... Oct 31 2017, 09:32 PM
HalfMoon
A friend of mine who owns a race shop that does ... Oct 31 2017, 10:05 PM porschetub
A friend of mine who owns a race shop that does a... Oct 31 2017, 10:19 PM shoguneagle Agree with all the above. I am running 23mm M/C w... Oct 31 2017, 10:52 PM HalfMoon
Agree with all the above. I am running 23mm M/C ... Oct 31 2017, 10:57 PM HalfMoon To clarify-
I run a 19mm too (as well as a variet... Oct 31 2017, 10:55 PM mepstein
To clarify-
I run a 19mm too (as well as a varie... Nov 1 2017, 05:30 AM jd74914
To clarify-
I run a 19mm too (as well as a vari... Nov 1 2017, 05:49 AM mepstein
[quote name='mepstein' post='2544209' date='Nov 1... Nov 1 2017, 05:58 AM HalfMoon
To clarify-
I run a 19mm too (as well as a vari... Nov 1 2017, 10:02 AM mepstein
[quote name='mepstein' post='2544209' date='Nov 1... Nov 1 2017, 11:36 AM porschetub
[quote name='mepstein' post='2544209' date='Nov ... Nov 1 2017, 04:59 PM infraredcalvin It’s not a 930 MC is a 23 mm ATE MC for a Merced... Oct 31 2017, 11:50 PM infraredcalvin Sorry had to edit above... Oct 31 2017, 11:55 PM flyer86d My old 911SC track car had turbo brakes front and ... Nov 1 2017, 05:30 AM DBCooper And, important to note, with just a larger m/c you... Nov 1 2017, 08:28 AM Racer Chris We just swapped out a 23mm M/C for a 22 mm VW unit... Nov 1 2017, 09:04 AM HalfMoon
We just swapped out a 23mm M/C for a 22 mm VW uni... Nov 1 2017, 10:05 AM mgp4591
We just swapped out a 23mm M/C for a 22 mm VW uni... Nov 1 2017, 11:05 AM Racer Chris
Is that the M/C for the Corrado that you swapped ... Nov 1 2017, 11:07 AM tomeric914 20.64mm or 22.22mm Master Cylinder Option How-To t... Nov 1 2017, 07:03 PM HalfMoon
20.64mm or 22.22mm Master Cylinder Option How-To ... Nov 2 2017, 05:38 PM Racer Chris
20.64mm or 22.22mm Master Cylinder Option How-To... Nov 2 2017, 07:08 PM tomeric914 David,
This is basic hydraulics, but somehow, too... Nov 2 2017, 07:54 PM HalfMoon
David,
This is basic hydraulics, but somehow, to... Nov 2 2017, 11:48 PM Keyser Sose I currently run a 19mm and find that their's s... Nov 3 2017, 10:56 AM Racer Chris
the bias valve can make it hard to get them full... Nov 3 2017, 03:03 PM Keyser Sose
the bias valve can make it hard to get them ful... Nov 3 2017, 03:37 PM Racer Chris
So do those valves ever go bad?
They don't ... Nov 4 2017, 09:06 AM tomeric914 THIS IS AN EXAMPLE ONLY!!! You need t... Nov 3 2017, 03:04 PM DBCooper OK, when I got my car the pedal was way too hard. ... Nov 1 2017, 10:34 AM Dave_Darling When you change the diameter of the master cylinde... Nov 1 2017, 09:48 PM tomeric914 ...on a bone stock brake system
When you change ... Nov 2 2017, 08:39 AM Dave_Darling
...on a bone stock brake system
No, that's ... Nov 2 2017, 12:07 PM tomeric914 The reason for going with a larger master cylinder... Nov 2 2017, 07:36 PM SirAndy When you change the diameter of the master cylinde... Nov 2 2017, 11:19 AM porschetub
When you change the diameter of the master cylind... Nov 2 2017, 06:59 PM GeorgeRud Is the lack of a proportioning valve on the 911s b... Nov 4 2017, 09:19 AM |
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