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Old 05-23-2002, 07:37 PM   #20
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Member#: 16215
Join Date: Mar 2002
Location: In a place with no laws, just "guidlines"
2002 WR WRX wagon


Originally posted by Jon Bogert
OK look at it this way...

If you use a larger MC, but change nothing else, the ratio of the MC area to the caliper piston area will increase. If it's 1:70 and you double the size (area) of the MC, it becomes 1:35. So to produce equivalent stopping force, you have to push twice as hard.

Take this example to its limits--with equal area MC area and caliper piston area--and you'd have to push pretty damn hard to generate that 1800lbs of force!
Yes your right.

I did get myself mixed up. In my own mind confused effort and feedback. Hey I am a little sick so I'm sure the beer had nothing to do with it.

Sorry I shouldn't have used the term effort. I forget that not everyone thinks the same way I do.

With a larger MC bore you will have less "feedback" Think of it in the same terms are air in the system, requires more effort to stop and gives a mushy pedal (of course air also increase travel).

I should have put it in terms of feedback. A larger bore MC gives you less feedback.

SUVS and full-size pickups are great examples. Even when their brake sizing at the corners is fine they still require a hefty push on the pedal, but the pedal feels like a bag of marshmellows because of the large bore MC they have to get the required volume.

In pedal feel there's:

Effort vs. Travel
Travel vs. deceleration
Effort vs. deceleration
Work vs. deceleration

I hang my head in shame!
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Last edited by romanom; 05-23-2002 at 08:14 PM.
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