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Hi Tim,
We just had the discussion on the Jag forum that I belong to about going to a "different than stock" master cylinder diameter. When I bought a new master cylinder for my 914 the opinion that I got here on this forum was that: if you do not mind a very stiff pedal, the 19mm is ok, otherwise stick with the 17mm even though it costs more to get a replacement. I just ran the numbers and the 19mm would take 125% as much pedal pressure as the 17mm to apply the same pressure to the calipers while only moving 80% of the distance in pedal travel. This would be fine for a man with a strong leg, but since a lady would also be driving my car, I opted for the 17mm. My car is not going on the race track, so maybe someone else can share their opinion about whether or not the 17mm master cylinder could cause you to run out of having "enough pedal" on the track.
Leon Smith
72 914 w/Rayco kit
Last edited by kachemakian; 01-29-2010 at 06:59 PM..
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