 Calling for a 17mm Master Cylinder, Don't like the 19mm!! |
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| Artfrombama |
 Jun 17 2025, 11:32 AM
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#1
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Member  Group: Members Posts: 352 Joined: 21-January 24 From: North Alabama Member No.: 27,870 Region Association: South East States 
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Replaced the OE 17mm that came on my 74 because it was leaking out of the rear. Replaced it with the 19mm that is currently offered as a replacement.
Not happy with the increased pedal pressure required to stop the car, almost scary in a panic situation. No pedal modulation. I would like to return to a 17mm unit but there seems to be no more out there, does anyone have a source? Is someone in the parts supply chain able to reproduce these parts reasonably? Thanks! |
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| StratPlayer |
Jun 17 2025, 12:53 PM
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#2
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StratPlayer Group: Members Posts: 3,339 Joined: 27-December 02 From: SLC, Utah Member No.: 27 Region Association: Rocky Mountains 
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Getting ready to install a 23mm MC, recommended by PMB. BMW 320i up front 914/6 rear calipers.
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| bdstone914 |
Jun 17 2025, 10:17 PM
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#3
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bdstone914 Group: Members Posts: 5,101 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
QUOTE(StratPlayer @ Jun 17 2025, 11:53 AM)  Getting ready to install a 23mm MC, recommended by PMB. BMW 320i up front 914/6 rear calipers. That sounds like too much master. The 914-6 M calipers used the same size pistons as the 320i and used a 19mm. |
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| infraredcalvin |
Jul 8 2025, 08:23 PM
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#4
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Distracted Member Group: Members Posts: 1,670 Joined: 25-August 08 From: Ladera Ranch, CA Member No.: 9,463 Region Association: Southern California
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QUOTE(bdstone914 @ Jun 17 2025, 09:17 PM) QUOTE(StratPlayer @ Jun 17 2025, 11:53 AM) Getting ready to install a 23mm MC, recommended by PMB. BMW 320i up front 914/6 rear calipers. That sounds like too much master. The 914-6 M calipers used the same size pistons as the 320i and used a 19mm. (IMG:style_emoticons/default/agree.gif) That seems like a dangerous combo… S or A 911 calipers on front and Ms on the rear are great (and proper) with the 19mm MC… The 23 is typically used for 930 and 993 brake conversions… I have all these setups… |
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Posts in this topic
Artfrombama Calling for a 17mm Master Cylinder Jun 17 2025, 11:32 AM
rjames
Replaced the OE 17mm that came on my 74 because i... Jun 17 2025, 11:40 AM Shivers I did the 19 mm M/C and some of Eric Shea’s stic... Jun 17 2025, 11:54 AM mepstein I’m with you. I’ve tried both and prefer a 17m... Jun 17 2025, 11:55 AM
Artfrombama
I’m with you. I’ve tried both and prefer a 17... Jun 17 2025, 01:07 PM Jack Standz We have at least two failed 17mm master cylinders/... Jun 17 2025, 01:45 PM 914werke Agree that it would be best if a rebuild kit coul... Jun 17 2025, 02:05 PM mepstein 17mm rebuild kits are a thing of the past. Im surp... Jun 17 2025, 02:08 PM 914Sixer My car has a one year only 1969 911T 20mm MC used ... Jun 17 2025, 04:40 PM porschetub
My car has a one year only 1969 911T 20mm MC used... Jun 17 2025, 09:40 PM 914xr75 I just purchased a fresh 17mm ATE mc at Pelican la... Jun 17 2025, 06:23 PM 904svo
Replaced the OE 17mm that came on my 74 because i... Jun 17 2025, 06:27 PM bkrantz The 17 mm MC has a cross section area of about 227... Jun 17 2025, 08:50 PM Jack Standz
I just purchased a fresh 17mm ATE mc at Pelican l... Jun 18 2025, 02:12 AM Jack Standz
17mm rebuild kits are a thing of the past. Im sur... Jun 18 2025, 02:17 AM bdstone914
Replaced the OE 17mm that came on my 74 because i... Jun 18 2025, 03:23 AM Artfrombama
Replaced the OE 17mm that came on my 74 because ... Jun 18 2025, 11:55 AM 930cabman somebody has the technology to fabricate these :i... Jun 18 2025, 12:07 PM Artfrombama
somebody has the technology to fabricate these :... Jun 18 2025, 12:37 PM rjames
somebody has the technology to fabricate these ... Jun 18 2025, 01:56 PM 930cabman
[quote name='Artfrombama' post='3210825' date='Ju... Jun 18 2025, 05:02 PM Artfrombama
[quote name='Artfrombama' post='3210825' date='J... Jun 19 2025, 09:39 AM mepstein
[quote name='930cabman' post='3210849' date='Jun ... Jun 19 2025, 11:01 AM emerygt350
[quote name='930cabman' post='3210849' date='Jun... Jul 7 2025, 07:42 PM 914xr75 Call pelican. They actually took a week to get my ... Jun 18 2025, 01:09 PM pfreiburger Here, try this, a brand new ATE 17mm cylinder (cle... Jun 19 2025, 12:27 AM 914Sixer Another ebay idiot LISTING THE WRONG PART. Jun 19 2025, 08:25 AM Highland I saw this on Pelican's site:
https://www.pel... Jul 7 2025, 07:00 PM anderssj
I saw this on Pelican's site:
https://www.pe... Jul 8 2025, 11:16 AM Chris914n6 I've had issues with rockauto after it changed... Jul 8 2025, 02:27 AM mepstein
I've had issues with rockauto after it change... Jul 8 2025, 05:26 AM friethmiller Dumb question here. Would a larger 23mm MC be ok w... Jul 8 2025, 09:36 AM Superhawk996
Dumb question here. Would a larger 23mm MC be ok ... Jul 8 2025, 09:52 AM Superhawk996 For comparison- the 19mm master cylinder is about ... Jul 8 2025, 09:54 AM friethmiller
Bad plan.
Would result in an 83% increase in p... Jul 8 2025, 12:33 PM Mitox Or, if you can get a loan, there is this rebuild k... Jul 8 2025, 08:03 PM Literati914 Are Centric MC’s out of the question?:
https://... Jul 9 2025, 10:16 AM |
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