datsun-roadsters
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Re: [Roadsters] Brakes Phil Erickson

To: philip erickson <fj20spl311@yahoo.com>, "datsun-roadsters@autox.team.net" <datsun-roadsters@autox.team.net>
Subject: Re: [Roadsters] Brakes Phil Erickson
From: Gary and Cindy Ault via Datsun-roadsters <datsun-roadsters@autox.team.net>
Date: Tue, 8 Sep 2015 04:14:30 +0000 (UTC)
Delivered-to: mharc@autox.team.net
Delivered-to: datsun-roadsters@autox.team.net
References: <739726257.116948.1441165177134.JavaMail.yahoo@mail.yahoo.com>
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I have found that stock roadster brakes, properly set up and adjusted, work=
 just fine in non-racing applications. =C2=A0I have both early (1966) and l=
ater (1967-1/2) cars. =C2=A0I have had the '66 1600 with a U20 motor in it =
for over 40 years.
Gary
      From: philip erickson via Datsun-roadsters <datsun-roadsters@autox.te=
am.net>
 To: "datsun-roadsters@autox.team.net" <datsun-roadsters@autox.team.net>=20
 Sent: Tuesday, September 1, 2015 10:39 PM
 Subject: [Roadsters] Brakes Phil Erickson
  =20
 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 si=
ze change on a disc / drum set-up.
The response / braking torque to pressure is Linear with disc brakes and sq=
uared or even cubed with drum brakes.=C2=A0 Best to use a proportioning val=
ve 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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<html><body><div style=3D"color:#000; background-color:#fff; font-family:Co=
urier New, courier, monaco, monospace, sans-serif;font-size:16px"><div id=
=3D"yui_3_16_0_1_1441651398621_75018" dir=3D"ltr"><span id=3D"yui_3_16_0_1_=
1441651398621_75017">I have found that stock roadster brakes, properly set =
up and adjusted, work just fine in non-racing applications. &nbsp;I have bo=
th early (1966) and later (1967-1/2) cars. &nbsp;I have had the '66 1600 wi=
th a U20 motor in it for over 40 years.</span></div><div id=3D"yui_3_16_0_1=
_1441651398621_75018" dir=3D"ltr"><span><br></span></div><div id=3D"yui_3_1=
6_0_1_1441651398621_75018" dir=3D"ltr"><span>Gary</span></div><br>  <div st=
yle=3D"font-family: Courier New, courier, monaco, monospace, sans-serif; fo=
nt-size: 16px;"> <div style=3D"font-family: HelveticaNeue, Helvetica Neue, =
Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir=3D=
"ltr"> <hr size=3D"1">  <font size=3D"2" face=3D"Arial"> <b><span style=3D"=
font-weight:bold;">From:</span></b> philip erickson via Datsun-roadsters &l=
t;datsun-roadsters@autox.team.net&gt;<br> <b><span style=3D"font-weight: bo=
ld;">To:</span></b> "datsun-roadsters@autox.team.net" &lt;datsun-roadsters@=
autox.team.net&gt; <br> <b><span style=3D"font-weight: bold;">Sent:</span><=
/b> Tuesday, September 1, 2015 10:39 PM<br> <b><span style=3D"font-weight: =
bold;">Subject:</span></b> [Roadsters] Brakes  Phil Erickson<br> </font> </=
div> <div class=3D"y_msg_container"><br><div id=3D"yiv8137988646"><div><div=
 style=3D"color:#000;background-color:#fff;font-family:verdana, helvetica, =
sans-serif;font-size:16px;"><div dir=3D"ltr">  I tried to send this, but fr=
om the wrong email.....so I think it got cut.</div><div id=3D"yiv8137988646=
yui_3_16_0_1_1441165079861_2847" dir=3D"ltr"><br></div><div id=3D"yiv813798=
8646yui_3_16_0_1_1441165079861_2848" dir=3D"ltr">It's very difficult to gue=
ss on the braking response of a wheel cylinder size change on a disc / drum=
 set-up.<br id=3D"yiv8137988646yui_3_16_0_1_1441165079861_2849">The
 response / braking torque to pressure is Linear with disc brakes and=20
squared or even cubed with drum brakes.&nbsp; Best to use a proportioning=
=20
valve on the rear to limit braking torque.<br id=3D"yiv8137988646yui_3_16_0=
_1_1441165079861_2850">A proportioning valve is=20
miss named as it changes the pressure response to pedal travel - which=20
flattens the torque response of the drum brake.</div><div id=3D"yiv81379886=
46yui_3_16_0_1_1441165079861_2851" dir=3D"ltr"><br></div><div id=3D"yiv8137=
988646yui_3_16_0_1_1441165079861_2852" dir=3D"ltr">Phil</div></div></div></=
div><br>________________________________________<br><br><a ymailto=3D"mailt=
o:datsun-roadsters@autox.team.net" href=3D"mailto:datsun-roadsters@autox.te=
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ers/aultgc@att.net</a><br><br><br><br><br></div> </div> </div>  </div></bod=
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