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With regard to the weight of the flywheel in the 100 I doubt that a lot of design went into optimization of that detail at the time the flywheel was specified. Remember the origins of that engine which was a truncated version of the 6 cylinder Austin lorry
engine. It was originally supposed to be used as a wartime replacement for worn out engines in Willys Jeeps should such become necessary. The war ended before such replacement was needed and so Austin ended up with a surplus of these engines in search of a
purpose. Under those circumstances I would guess that the flywheel used on these engines was carried over from the Austin 4 liter lorry engine.</div>
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If that is the case then there would be a lot of excess steel that can be safely shed for a smaller engine in a light weight vehicle such as an Austin Healey.</div>
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Bill Lawrence</div>
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BN1 #554 </div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Healeys <healeys-bounces@autox.team.net> on behalf of John Rowe <john@jtkarowe.com.au><br>
<b>Sent:</b> Saturday, January 5, 2019 8:55 AM<br>
<b>To:</b> 'Charles Schott'; michaelsalter@gmail.com<br>
<b>Cc:</b> healeys@autox.team.net<br>
<b>Subject:</b> Re: [Healeys] Lightweight Flywheel</font>
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<p class="x_MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif"; color:#1F497D">I put a flywheel of the early 6 cylinder on my 100- probably about half the weight of the original.</span></p>
<p class="x_MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif"; color:#1F497D">Motor was a little more than M-spec with flat top pistons.</span></p>
<p class="x_MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif"; color:#1F497D">Made it more lively boy no difference in tractability.</span></p>
<p class="x_MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif"; color:#1F497D">I must admit I never revved it hard, there being no need to.</span></p>
<p class="x_MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif"; color:#1F497D">A good mod in my opinion</span></p>
<p class="x_MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif"; color:#1F497D">John Rowe</span></p>
<p class="x_MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif"; color:#1F497D">Qld Australia</span></p>
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<p class="x_MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt; font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt; font-family:"Tahoma","sans-serif""> Healeys [mailto:healeys-bounces@autox.team.net]
<b>On Behalf Of </b>Charles Schott<br>
<b>Sent:</b> Saturday, 5 January 2019 12:45 AM<br>
<b>To:</b> michaelsalter@gmail.com<br>
<b>Cc:</b> healeys@autox.team.net<br>
<b>Subject:</b> Re: [Healeys] Lightweight Flywheel</span></p>
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<p class="x_MsoNormal"><span style="color:black">Michael,</span></p>
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<p class="x_MsoNormal"><span style="color:black">Thanks for the informative article. What is the affect of a lighter flywheel on the performance of the engine, especially in every day driving?</span></p>
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<p class="x_MsoNormal"><span style="color:black">Regards,</span></p>
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<p class="x_MsoNormal"><span style="color:black"> </span></p>
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<p class="x_MsoNormal"><span style="color:black">Charlie</span></p>
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<p class="x_MsoNormal"><b><span style="font-family:"Helvetica","sans-serif"; color:black">From:
</span></b><span style="font-family:"Helvetica","sans-serif"; color:black">"Michael Salter" <michael.salter@gmail.com><br>
<b>To: </b>"Charlie Schott" <schottc@knology.net><br>
<b>Cc: </b>healeys@autox.team.net<br>
<b>Sent: </b>Thursday, January 3, 2019 7:03:22 PM<br>
<b>Subject: </b>Re: [Healeys] Lightweight Flywheel</span></p>
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<p class="x_MsoNormal"><span style="font-family:"Helvetica","sans-serif"; color:black">Read this first </span></p>
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<p class="x_MsoNormal"><span style="font-family:"Helvetica","sans-serif"; color:black"><a href="http://www.netbug.net/blogmichael/2017/01/03/austin-healey-100-crank-failures/" target="_blank">http://www.netbug.net/blogmichael/2017/01/03/austin-healey-100-crank-failures/</a></span></p>
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<p class="x_MsoNormal"><span style="font-family:"Helvetica","sans-serif"; color:black">On Thu, Jan 3, 2019, 7:42 PM Charles Schott <<a href="mailto:schottc@knology.net" target="_blank">schottc@knology.net</a> wrote:</span></p>
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<p class="x_MsoNormal"><span style="color:black">Has anyone used a lightweight flywheel on their 100 BN1? I plan on going with a complete Le Mans kit and a lightweight flywheel and the car will be for street use. If you have, what are your thoughts on it? Thanks.</span></p>
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<p class="x_MsoNormal"><span style="color:black">Regards,</span></p>
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<p class="x_MsoNormal"><span style="color:black"> </span></p>
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<p class="x_MsoNormal"><span style="color:black">Charlie Schott</span></p>
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<p class="x_MsoNormal"><b><span style="font-family:"Helvetica","sans-serif"; color:black">From:
</span></b><span style="font-family:"Helvetica","sans-serif"; color:black">"Michael Salter" <<a href="mailto:michael.salter@gmail.com" target="_blank">michael.salter@gmail.com</a>><br>
<b>To: </b>"Bob Spidell" <<a href="mailto:bspidell@comcast.net" target="_blank">bspidell@comcast.net</a>><br>
<b>Cc: </b><a href="mailto:healeys@autox.team.net" target="_blank">healeys@autox.team.net</a><br>
<b>Sent: </b>Thursday, December 20, 2018 9:51:43 AM<br>
<b>Subject: </b>Re: [Healeys] tri power for sale</span></p>
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<p class="x_MsoNormal"><span style="font-family:"Helvetica","sans-serif"; color:black">I encourage as many people as possible to "M" up their 100's.</span></p>
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<p class="x_MsoNormal"><span style="font-family:"Helvetica","sans-serif"; color:black">Makes original cars that much more valuable. </span></p>
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<p class="x_MsoNormal"><span style="font-family:"Helvetica","sans-serif"; color:black">M</span></p>
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<p class="x_MsoNormal"><span style="font-family:"Helvetica","sans-serif"; color:black">On Thu, Dec 20, 2018, 9:52 AM Bob Spidell <<a href="mailto:bspidell@comcast.net" target="_blank">bspidell@comcast.net</a> wrote:</span></p>
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<p class="x_MsoNormal" style="margin-bottom:12.0pt"><span style="font-family:"Helvetica","sans-serif"; color:black">My understanding is that the 'kits' installed by dealers varied; the
<br>
complete one--the one done at the Healey shop--includes higher <br>
compression pistons, a more aggressive cam, some suspension tweaks <br>
(stiffer shocks, maybe a larger anti-sway bar), a different distributor <br>
and, of course, the louvred bonnet.<br>
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Someone wrote up a list of mods that could be done--even better cam <br>
profile, for example--that could be done to a 'stock' BN1/2 to achieve <br>
performance superior to a M, while keeping the original 'flavor' of the car.<br>
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Bob<br>
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On 12/19/2018 11:14 PM, <a href="mailto:sentenac.rw@gmail.com" target="_blank">sentenac.rw@gmail.com</a> wrote:<br>
> Well, for starters you can look at page A34 of the Moss Motors<br>
> catalogue. The section labeled "100M Conversion". It may be a<br>
> different page on the latest catalogue. Carbs, Manifold set, cold air<br>
> box,etc.<br>
><br>
> -Roland<br>
><br>
> On Wed, 19 Dec 2018 18:48:10 -0500 (EST), you wrote:<br>
><br>
>> I recently purchased a 1955 100-4 for a frame off restoration. Since I'm going to rebuild the engine, I'd like to give it the "M" upgrade. Does anyone know where I can purchase the parts for what they call the LeMans kit? Thanks.<br>
>><br>
>> Regards,<br>
>><br>
>> Charlie Schott<br>
>><br>
>><br>
>><br>
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