Poll: Brake upgrades..what kind of ratio?, F=big/R= big or F=big/R=little or ??? |
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Poll: Brake upgrades..what kind of ratio?, F=big/R= big or F=big/R=little or ??? |
Mueller |
Feb 3 2005, 07:27 PM
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#1
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None |
okay...for a factory 914 /4, the front calipers (piston area wise) are 1.61 larger than the rear....(42mm and 33mm)
for early 911's (up to '84), the fronts are 1.6 larger from '84 to '89, the fronts are only 1.3 times larger than the rears....then the ratios vary from 1.4 to 1.7 until the arrival of the 1st Twin-turbo, that car has calipers that have piston areas 2X the size of the rears !!!!! I'm just wondering what combo people have successfully ran.....it's interesting to note that the standard Boxster front calipers if bolted to the front of a 911, the Boxster piston area is only 1.05 larger than the standard 911 fronts.....seems like a darn near equal swap, except for the bigger pads you get with the Boxster calipers (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) |
lapuwali |
Feb 16 2005, 03:20 PM
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#2
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Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743 |
True enough. Tires don't use the "classic" friction model usually taught in school. Brakes, however, do. Indeed, brakes are nearly the ideal thing to use to teach the classic friction model, since all of the effects are present: coefficient of friction, lubrication effects, heat effects. In also somewhat decouples the the mass v. weight issue, since people learning basic physics often confuse overcoming inertia with overcoming friction when taught using the normal "pushing a big stone block" technique. Tires are so complex it's pretty hard to teach how they really work in a basic physics course. |
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