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Old 04-24-2004, 09:33 AM
Mike Simard Mike Simard is offline
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Join Date: Nov 2003
Location: Dacula, GA
Cobra Make, Engine: Porsche 928 S4
Posts: 408
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Thanks Morris, Rick Dorman put together a braking spreadsheet and it was discussed here some time ago. It's really slick and takes into account just about everything, stuff like tire traction and cg height. In order to use the spreadsheets I need to know what I'm after for F/R ratios.
Just some random thoughts: I would guess that in order to prevent the rear brakes from locking up going into a turn under heavy braking they would have to have a very small percentage of total braking, not merely 5-10% less.
Wouldn't it be nice if the rear brakes had proportionally less pressure as the total pedal force and presumebly the front weight bias increased? How could this be accomplished?
Dennis Olthoff made a good point about the effect of engine deceleration on rear brakes.
Here's what I'm planning for my own car:
13" front rotors with Wilwood 6 piston calipers, total piston area=4.03 sq.in.
Now, what to use for the rears? I was thinking of a 4 small pistons of about 1/2 the total area of the fronts on a 10.5 disk. That's where I'm at now.
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