[Top] [All Lists]

Re: Brakes without booster

To: CE25593@aol.com
Subject: Re: Brakes without booster
From: Larry Paulick <larry.p@erols.com>
Date: Fri, 15 Aug 2003 10:54:56 -0700
Bob, one of the easiest ways is to get better brake pads.  Stock pads 
have a Cd of around .25-.30.  I use Porterfield R4-S pads with a Cd of .40.

Here is the formula.

T=R*A*F*N *P       
T=total system torque (clamping ability)       
R=effective disc radius (dist from disc center to the caliber piston)    
A=effective area of the piston top, not including seal       
Use (1/2D)(1/2D)(3.14) with D equals the piston top diameter, then        
Fiat bore = 1.375, Wilwood singe bore = 1.75"       
multiply by the number (N) of pistons per caliber (count only       
one side on opposed piston caliber designs) D=1.75", A=2.4*2       
Front D=1.75", Rear Fiat D=1..334"       
F=coefficient of friction produced by the lining (Porterfield R-4S=.4, 

The effect of the better Cd of the pad is direct  and can increase the 
total system torque by 33% -60%.


CE25593@aol.com wrote:

>Hi all.  I am looking for recommendations, suggestions, etc. regarding the 
>best way to get good braking without using the booster.  I intend to keep the 
>stock front disk and drum rear brakes.  I also want to keep the 13" rims.  I 
>seeking recommendations for a master cylinder changeout and type of pads and 
>shoes to use.  Thank you in advance for your comments.
>Bob Haynes, San Diego

<Prev in Thread] Current Thread [Next in Thread>