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<font size="-1"><font face="Courier 10 Pitch">More nitpicking: gas
tank capacity is 12 imperial gallons or 14.4 US gallons. :)</font></font><br>
<pre class="moz-signature" cols="72">Cheers,
Bob Haskell
Austin Healey 3000 BN7/BT7 registrar</pre>
<div class="moz-cite-prefix">On 9/7/21 8:39 PM, Michael Oritt wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAPTa0B5QV4R=LvcVGS+guv+2kOUAGL6G8hapmRdCFw6XPHwFvw@mail.gmail.com">
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<div dir="ltr">
<div class="gmail_default" style="color:#3333ff">Keith--</div>
<div class="gmail_default" style="color:#3333ff"><br>
</div>
<div class="gmail_default" style="color:#3333ff">Right you are
(and wrong I am) but 6 x 6.3=20+/-which is still more than
5...</div>
<div class="gmail_default" style="color:#3333ff"><br>
</div>
<div class="gmail_default" style="color:#3333ff">Best--Michael
Oritt</div>
<div class="gmail_default" style="color:#3333ff"><br>
</div>
<div class="gmail_default" style="color:#3333ff"><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Tue, Sep 7, 2021 at 7:53 PM
llennep--- via Healeys <<a
href="mailto:healeys@autox.team.net" moz-do-not-send="true">healeys@autox.team.net</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div style="color:black;font:10pt Arial,Helvetica,sans-serif">Nitpicking
me here . . .. .. .
<div>gallon of gasoline weighs a tad over 6 lbs</div>
<div>:)<br>
<br>
<br>
<div
style="font-family:helvetica,arial;font-size:10pt;color:black"><font
size="2">-----Original Message-----<br>
From: Michael Oritt via Healeys <<a
href="mailto:healeys@autox.team.net" target="_blank"
moz-do-not-send="true">healeys@autox.team.net</a>><br>
To: richard mayor <<a
href="mailto:boyracer466@gmail.com" target="_blank"
moz-do-not-send="true">boyracer466@gmail.com</a>><br>
Cc: healeys <<a
href="mailto:healeys@autox.team.net" target="_blank"
moz-do-not-send="true">healeys@autox.team.net</a>><br>
Sent: Tue, Sep 7, 2021 7:40 pm<br>
Subject: Re: [Healeys] Lightened flywheels<br>
<br>
<div id="gmail-m_-6446079295951788294yiv1063698908">
<div>
<div dir="ltr">
<div><span style="color:rgb(51,51,255)">I
hesitate to nitpick but as to the statement
that </span><i><font color="#0000ff">"4 to
5 pounds off vehicle weight is really only
the equivalent of half a tank of fuel" </font> </i><font
color="#0000ff">the l</font><font
color="#3333ff">ast time I looked an AH fuel
tank holds about 12 gallons and since
gasoline weighs approximately 7.5 lbs per
gallon half a tank weighs about 45 pounds. </font><span
style="color:rgb(51,51,255)">The defense
rests....</span></div>
<div><font color="#3333ff"><br clear="none">
</font></div>
<div><font color="#3333ff">Best--Michael Oritt </font></div>
</div>
<br clear="none">
<div>
<div
id="gmail-m_-6446079295951788294yiv1063698908yqtfd54840">
<div dir="ltr">On Tue, Sep 7, 2021 at 6:00 PM
richard mayor via Healeys <<a
shape="rect"
href="mailto:healeys@autox.team.net"
rel="noreferrer noopener" target="_blank"
moz-do-not-send="true">healeys@autox.team.net</a>>
wrote:<br clear="none">
</div>
</div>
<blockquote style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div
id="gmail-m_-6446079295951788294yiv1063698908yqtfd20741">
<div dir="ltr">
<div>Michael, <br clear="none">
</div>
<div><br clear="none">
</div>
<div>Comparing the weight of fuel in the
gas tank to rotational mass is like
comparing apples to bananas. <br
clear="none">
</div>
<div><br clear="none">
</div>
<div>Richard<br clear="none">
</div>
<div><br clear="none">
</div>
</div>
<br clear="none">
<div>
<div dir="ltr">On Tue, Sep 7, 2021 at 2:24
PM Michael Salter <<a shape="rect"
href="mailto:michaelsalter@gmail.com"
rel="noreferrer noopener"
target="_blank" moz-do-not-send="true">michaelsalter@gmail.com</a>>
wrote:<br clear="none">
</div>
<blockquote style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div>The total mass of the flywheel is
not completely relevant insofar as
engine moment of inertia is concerned.
<div>What is important is the mass
removed times the square of the
radius, so just how much weight has
been removed per se is not
important. </div>
<div>Secondly removing rotational
inertia is not always the best thing
to do, if it was you can be assured
that manufacturers would be all over
it as a way to save money.</div>
<div>The rotational mass is often
designed in to protect the drive
train, in particular the gearbox.</div>
<div>Read this: <a shape="rect"
href="https://www.netbug.net/blogmichael/2017/01/03/austin-healey-100-crank-failures/"
rel="noreferrer noopener"
target="_blank"
moz-do-not-send="true">https://www.netbug.net/blogmichael/2017/01/03/austin-healey-100-crank-failures/</a></div>
<div>Thirdly lightening a flywheel in
of itself has very little effect on
acceleration. An engine with a
lightened flywheel may accelerate to
6000 RPM 1 - 2 seconds more quickly
but that doesn't necessarily equate
to 1-2 seconds faster to 60 MPH. You
may be able to shift marginally
faster if the gearbox can stand the
extra loads and the 4 to 5 pounds
off vehicle weight is really only
the equivalent of half a tank of
fuel. (Who ever notices that their
car accelerates more quickly with a
half full gas tank).</div>
<div><br clear="none">
</div>
<div>Just sayin'</div>
<div><br clear="none">
</div>
<div>M</div>
</div>
<br clear="none">
<div>
<div dir="ltr">On Tue., Sep. 7, 2021,
4:17 p.m. Earl Kagna via Healeys,
<<a shape="rect"
href="mailto:healeys@autox.team.net"
rel="noreferrer noopener"
target="_blank"
moz-do-not-send="true">healeys@autox.team.net</a>>
wrote:<br clear="none">
</div>
<blockquote style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div lang="EN-US">
<div>
<div>I have Bill Bolton
lightened flywheels in both my
Healeys. According to Kent
Lambert, who took over Bills
Healey business awhile back,
the stock weight (6 cyl) is
28.5 pounds, and Bills
machining program reduced them
to 24.</div>
<div> </div>
<div>Both of my cars run just
fine, no problems at all in
the 20 + or so years that I’ve
had them installed.</div>
<div> </div>
<div>Earl Kagna</div>
<div>Victoria BC</div>
<div>BJ8, BT7 tri-carb</div>
<div> </div>
<div> </div>
<div> </div>
<div
style="border-color:rgb(225,225,225)
currentcolor
currentcolor;border-style:solid
none none;border-width:1pt
medium medium;padding:3pt 0in
0in">
<div><b>From:</b> Healeys <<a
shape="rect"
href="mailto:healeys-bounces@autox.team.net"
rel="noreferrer noopener"
target="_blank"
moz-do-not-send="true">healeys-bounces@autox.team.net</a>>
<b>On Behalf Of </b>richard
mayor<br clear="none">
<b>Sent:</b> Tuesday,
September 7, 2021 10:23 AM<br
clear="none">
<b>To:</b> healeys <<a
shape="rect"
href="mailto:healeys@autox.team.net"
rel="noreferrer noopener"
target="_blank"
moz-do-not-send="true">healeys@autox.team.net</a>><br
clear="none">
<b>Subject:</b> [Healeys]
Lightened flywheels</div>
</div>
<div> </div>
<div>
<div>
<div>6 cylinder flywheels
vary slightly but are all
generally in the 29 pound
range. Very aggressive
machine work can get the
weight down to the 22-23
pound range. </div>
</div>
<div>
<div>How much weight you
take off will affect your
driving style. To maintain
the feel of a stock Healey
while still improving the
engines response, I
suggest removing no more
than 3 pounds. </div>
</div>
<div>
<div> </div>
</div>
<div>
<div>Richard </div>
</div>
</div>
</div>
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<div dir="ltr"><font color="#3333ff">Best--Michael</font></div>
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<div dir="ltr" class="gmail_signature"><font color="#3333ff">Best--Michael</font></div>
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