 What size master cylinder for Boxster brakes?, converted calipers now wondering about MC size. |
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| jj83118 |
 Jul 15 2008, 10:42 AM
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#1
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Newbie  Group: Members Posts: 33 Joined: 12-May 05 From: Colorado Springs, CO Member No.: 4,066 Region Association: None  |
Hello,
I was wondering if anyone could help me out. I'm planning on converting my car to Boxster calipers front & rear (already have them) and I am wondering if I will need a larger master cylinder. The car has flares with 255s & 245s on 16s and I have a 19 mm MC. I'm ok with a firm brake pedal and I am thinking of putting a 23 mm MC in, but I wonder if it will be too much. Is there anyone out there with some first-hand experience? Thanks, Jim |
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| TravisNeff |
Jul 15 2008, 10:49 AM
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#2
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914 Guru Group: Members Posts: 5,082 Joined: 20-March 03 From: Mesa, AZ Member No.: 447 Region Association: Southwest Region 
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I have heard from several people with bigger brakes than boxster calipers and are happy to run the 19mm MC, some have had 23's and went back to a 19 for better modulation.
QUOTE(jj83118 @ Jul 15 2008, 09:42 AM)  Hello, I was wondering if anyone could help me out. I'm planning on converting my car to Boxster calipers front & rear (already have them) and I am wondering if I will need a larger master cylinder. The car has flares with 255s & 245s on 16s and I have a 19 mm MC. I'm ok with a firm brake pedal and I am thinking of putting a 23 mm MC in, but I wonder if it will be too much. Is there anyone out there with some first-hand experience? Thanks, Jim |
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| jj83118 |
Jul 15 2008, 12:57 PM
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#3
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Newbie Group: Members Posts: 33 Joined: 12-May 05 From: Colorado Springs, CO Member No.: 4,066 Region Association: None |
Thanks! That's the kind of info I was looking for.
Jim |
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| SLITS |
Jul 15 2008, 01:01 PM
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#4
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
Installing the 23 mm (actually a Mercedes Benz master) will require denting the suspension cross beam for clearance.
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| ClayPerrine |
Jul 15 2008, 01:21 PM
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#5
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Life's been good to me so far..... Group: Admin Posts: 16,422 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille
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I have the boxster brakes on my 914 with the same size tires you are planning on running. I use a 23mm master cylinder, and I like the pedal feel better than I did when I had the 944 turbo brakes.
Just my $.02 |
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| SirAndy |
Jul 15 2008, 01:28 PM
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#6
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Resident German Group: Admin Posts: 42,244 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(jj83118 @ Jul 15 2008, 08:42 AM) Is there anyone out there with some first-hand experience? yes. we just converted Tom's 911 racecar to boxster brakes front and rear. we used the 23mm MC and it works great with the brakes! very good pedal feel and prompt and plenty of stoppage ... (IMG:style_emoticons/default/bye1.gif) Andy |
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