# I got a question or two

Posted by MIKE (93VE) on September 07, 2002 at 21:24:29:

In Reply to: A Few pics you brake guys might want to see... :) (and long explanation of theory and reasoning) posted by Matt on September 07, 2002 at 11:45:00:

Can you explain exactly how your rear breaking force has increased with the larger diameter rotor and you're still using the OEM size caliper/pads (pads could be after-market) Granted with a larger diameter rotor it will resist and dissapate heat easier when compared to a smaller piece, but if the actual square inch of the clamping force hasn't increase it would seem to me you're still going to have that large brake bias as before during your everyday daily driving. Now if you take your new brake set-up to the tracks, this is where they will perform well and hold up better with the heat. I haven't really had a chance to look at any of these big brake kit for which ever car, but it seems to me that these kits include larger calipers and rotors. Before I leave, two thumbs up for your rear brake set-up because all those with SE's and 17" plus wheels know how dinky the stock calipers look within those wheels. Thanks again, copy/paste/filed.

Replys:

- answers.... Matt (93SE) 00:41:35 9/08/2002 (12)
  - I understand and know advantage of using a longer handles MIKE (93VE) 10:44:51 9/08/2002 (11)
    - As Mentat said, it doesn't change the pressure exerted on the rotor... The same pressure is applied farther from the center point to provide more torque to stop the car. nm Matt (93SE) 13:26:53 9/08/2002 (0)
    - I'm well out of my knowledge here but I think the key is putting the point of application of the force (the caliper) further from the actual center of rotation would increase leverage? I'm picturing a line drawn from the hub to the caliper here... and the longer that line, the more leverage? am I on the right track here? mentat (93se 5spd) 12:24:24 9/08/2002 (9)
      - Yes, another example would be.. Maximamike (92 SE) 12:37:12 9/08/2002 (8)
        - Dont get we wrong I totally understand the longer handle for more leverage, but MIKE (93VE) 14:00:07 9/08/2002 (5)
          - Uhhhh, the axle? Since that's where it's turning around, and attached to the moving part of the car. hmmmm. nm Matt (93SE) 14:58:42 9/08/2002 (4)
            - Interesting MIKE (93VE) 17:10:56 9/08/2002 (3)
              - I would say you're correct as far "clamping force", but thats only part of the "Stopping Force" equation.... mentat (93se 5spd) 18:20:37 9/08/2002 (2)
                - Thank-you MIKE (93VE) 20:26:34 9/08/2002 (1)
                  - Yup, you're getting it... mentat (93se 5spd) 10:56:21 9/09/2002 (0)
        - OT mike any update on your friend's rims... email me n/m mentat (93se 5spd) 12:44:27 9/08/2002 (1)
          - Oh shit, sorry bout that. I'll send ya an email when I get back to school tomorrow.. Maximamike (92 SE) 13:10:18 9/08/2002 (0)

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: Can you explain exactly how your rear breaking force has increased with the larger diameter rotor and you're still using the OEM size caliper/pads (pads could be after-market) Granted with a larger diameter rotor it will resist and dissapate heat easier when compared to a smaller piece, but if the actual square inch of the clamping force hasn't increase it would seem to me you're still going to have that large brake bias as before during your everyday daily driving. Now if you take your new brake set-up to the tracks, this is where they will perform well and hold up better with the heat. I haven't really had a chance to look at any of these big brake kit for which ever car, but it seems to me that these kits include larger calipers and rotors. Before I leave, two thumbs up for your rear brake set-up because all those with SE's and 17" plus wheels know how dinky the stock calipers look within those wheels. Thanks again, copy/paste/filed.