Re: [Roadsters] Brakes Phil Erickson

[Paul Kort via Datsun-roadsters <datsun-roadsters@autox.team.net>]

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  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@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@autox.team.net>
> *To:* "datsun-roadsters@autox.team.net" <datsun-roadsters@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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<div dir=3D"ltr"><div><div>=C2=A0 I&#39;ve crewed for three roadsters, two =
1600s in SCCA G PROD and one 2000 racing the vintage circuit.=C2=A0 All ran=
 with stock brakes, but with racing pads up front.=C2=A0 They all seemed to=
 stop just fine!<br><br></div>Paul<br></div>Ohio<br></div><div class=3D"gma=
il_extra"><br><div class=3D"gmail_quote">On Tue, Sep 8, 2015 at 12:14 AM, G=
ary and Cindy Ault via Datsun-roadsters <span dir=3D"ltr">&lt;<a href=3D"ma=
ilto:datsun-roadsters@autox.team.net" target=3D"_blank">datsun-roadsters@au=
tox.team.net</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" sty=
le=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><=
div style=3D"color:#000;background-color:#fff;font-family:Courier New,couri=
er,monaco,monospace,sans-serif;font-size:16px"><div dir=3D"ltr"><span>I hav=
e found that stock roadster brakes, properly set up and adjusted, work just=
 fine in non-racing applications.=C2=A0 I have both early (1966) and later =
(1967-1/2) cars.=C2=A0 I have had the &#39;66 1600 with a U20 motor in it f=
or over 40 years.</span></div><div dir=3D"ltr"><span><br></span></div><div =
dir=3D"ltr"><span>Gary</span></div><br>  <div style=3D"font-family:Courier =
New,courier,monaco,monospace,sans-serif;font-size:16px"> <div style=3D"font=
-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-ser=
if;font-size:16px"> <div dir=3D"ltr"> <hr size=3D"1">  <font face=3D"Arial"=
 size=3D"2"> <b><span style=3D"font-weight:bold">From:</span></b> philip er=
ickson via Datsun-roadsters &lt;<a href=3D"mailto:datsun-roadsters@autox.te=
am.net" target=3D"_blank">datsun-roadsters@autox.team.net</a>&gt;<br> <b><s=
pan style=3D"font-weight:bold">To:</span></b> &quot;<a href=3D"mailto:datsu=
n-roadsters@autox.team.net" target=3D"_blank">datsun-roadsters@autox.team.n=
et</a>&quot; &lt;<a href=3D"mailto:datsun-roadsters@autox.team.net"; target=
=3D"_blank">datsun-roadsters@autox.team.net</a>&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><br><div><div><div style=3D"color:#0=
00;background-color:#fff;font-family:verdana,helvetica,sans-serif;font-size=
:16px"><div dir=3D"ltr">  I tried to send this, but from the wrong email...=
..so I think it got cut.</div><div dir=3D"ltr"><br></div><div dir=3D"ltr">I=
t&#39;s very difficult to guess on the braking response of a wheel cylinder=
 size change on a disc / drum set-up.<br>The
 response / braking torque to pressure is Linear with disc brakes and=20
squared or even cubed with drum brakes.=C2=A0 Best to use a proportioning=
=20
valve on the rear to limit braking torque.<br>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 dir=3D"ltr"><br><=
/div><div dir=3D"ltr">Phil</div></div></div></div><br>_____________________=
___________________<br><br><a href=3D"mailto:datsun-roadsters@autox.team.ne=
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<br></blockquote></div><br></div>

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