NEW Group Buy 914 Master Cylinders $110 each, GB CLOSES TODAY 11/15/17 The rest will ship by 11/2 |
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NEW Group Buy 914 Master Cylinders $110 each, GB CLOSES TODAY 11/15/17 The rest will ship by 11/2 |
Mikey914 |
Oct 21 2015, 05:22 PM
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#1
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The rubber man Group: Members Posts: 12,661 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
I'm working on having new master cylinders made for the 914's. They are going to be 19mm to crossover for the 911 also. Now you can get a quality part at a reasonable price. These are about 90 days out, but they will be a quality product, that is fully engineered.
Who's in? |
Dave_Darling |
Dec 3 2015, 06:23 PM
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#2
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914 Idiot Group: Members Posts: 14,985 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
When you install a larger master cylinder, you reduce your "hydraulic advantage" over the caliper pistons. It's almost exactly the same effect as moving the pivot point of the brake pedal.
The 19mm M/C has 25% more area to the piston than the 17mm one does. That means to get the same clamping force at the calipers, you have to exert 25% harder, though the pedal moves 25% less distance. Most people seem to agree that the 19mm is a reasonable swap, but going up to 23mm (which I believe the earlier thread was talking about) is a Very Bad Idea unless you are significantly upgrading the caliper piston sizes. --DD |
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