[Roadsters] Brakes Phil Erickson

[Richard Shepard]

When I took my Roadster to a SCCA track nite at Portland the stock bakes sucked big time. But then the speed I was pulling with a KA did not help. Changed fronts to a street comp pad and did it help. Car now stops were it slowed down before.I use      KFP gold compound   and find they work on the street just for me as well as the track.  Did have to grind down to fit as they were too wide.rich     From: Gary Ault via Datsun-roadsters <datsun-roadsters at autox.team.net>
 To: Paul Kort <paulsdatsunstuff at gmail.com> 
Cc: "datsun-roadsters at autox.team.net" <datsun-roadsters at autox.team.net>; philip erickson <fj20spl311 at yahoo.com> 
 Sent: Tuesday, September 8, 2015 11:05 AM
 Subject: Re: [Roadsters] Brakes Phil Erickson
   
 So, there you go.  Thanks, Paul.
Gary


Sent from my mobile phone.

-------- Original message --------
From: Paul Kort <paulsdatsunstuff at gmail.com> 
Date: 09/08/2015 6:04 AM (GMT-06:00) 
To: Gary and Cindy Ault <aultgc at att.net> 
Cc: philip erickson <fj20spl311 at yahoo.com>, datsun-roadsters at autox.team.net 
Subject: Re: [Roadsters] Brakes Phil Erickson 

  I've crewed for three roadsters, two 1600s in SCCA G PROD and one 2000 racing the vintage circuit.  All ran with stock brakes, but with racing pads up front.  They all seemed to stop just fine!

Paul
Ohio

On Tue, Sep 8, 2015 at 12:14 AM, Gary and Cindy Ault via Datsun-roadsters <datsun-roadsters at autox.team.net> wrote:

I have found that stock roadster brakes, properly set up and adjusted, work just fine in non-racing applications.  I have both early (1966) and later (1967-1/2) cars.  I have had the '66 1600 with a U20 motor in it for over 40 years.
Gary
      From: philip erickson via Datsun-roadsters <datsun-roadsters at autox.team.net>
 To: "datsun-roadsters at autox.team.net" <datsun-roadsters at autox.team.net> 
 Sent: Tuesday, September 1, 2015 10:39 PM
 Subject: [Roadsters] Brakes Phil Erickson
   
 I tried to send this, but from the wrong email.....so I think it got cut.
It's very difficult to guess on the braking response of a wheel cylinder size change on a disc / drum set-up.
The response / braking torque to pressure is Linear with disc brakes and squared or even cubed with drum brakes.  Best to use a proportioning valve on the rear to limit braking torque.
A proportioning valve is miss named as it changes the pressure response to pedal travel - which flattens the torque response of the drum brake.
Phil
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