<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>
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<div style="font-family:helvetica,arial;font-size:10pt;color:black"><font size="2">-----Original Message-----<br>
From: Michael Oritt via Healeys <healeys@autox.team.net><br>
To: richard mayor <boyracer466@gmail.com><br>
Cc: healeys <healeys@autox.team.net><br>
Sent: Tue, Sep 7, 2021 7:40 pm<br>
Subject: Re: [Healeys] Lightened flywheels<br>
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<div class="yiv1063698908gmail_default" style=""><span style="color:rgb(51,51,255);">I hesitate to nitpick but as to the statement that </span><i style=""><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>
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<div class="yiv1063698908gmail_default" style=""><font color="#3333ff">Best--Michael Oritt </font></div>
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<div class="yiv1063698908gmail_attr" dir="ltr">On Tue, Sep 7, 2021 at 6:00 PM richard mayor via Healeys <<a shape="rect" ymailto="mailto:healeys@autox.team.net" href="mailto:healeys@autox.team.net" target="_blank" rel="noreferrer noopener">healeys@autox.team.net</a>> wrote:<br clear="none"></div>
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<div>Michael, <br clear="none"></div>
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<div>Comparing the weight of fuel in the gas tank to rotational mass is like comparing apples to bananas. <br clear="none"></div>
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<div>Richard<br clear="none"></div>
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<div class="yiv1063698908gmail_attr" dir="ltr">On Tue, Sep 7, 2021 at 2:24 PM Michael Salter <<a shape="rect" ymailto="mailto:michaelsalter@gmail.com" href="mailto:michaelsalter@gmail.com" target="_blank" rel="noreferrer noopener">michaelsalter@gmail.com</a>> wrote:<br clear="none"></div>
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<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/" target="_blank" rel="noreferrer noopener">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>
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<div>Just sayin'</div>
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<div>M</div>
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<div class="yiv1063698908gmail_attr" dir="ltr">On Tue., Sep. 7, 2021, 4:17 p.m. Earl Kagna via Healeys, <<a shape="rect" ymailto="mailto:healeys@autox.team.net" href="mailto:healeys@autox.team.net" target="_blank" rel="noreferrer noopener">healeys@autox.team.net</a>> wrote:<br clear="none"></div>
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<div class="yiv1063698908MsoNormal">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.<u></u><u></u></div>
<div class="yiv1063698908MsoNormal"><u></u> <u></u></div>
<div class="yiv1063698908MsoNormal">Both of my cars run just fine, no problems at all in the 20 + or so years that I’ve had them installed.<u></u><u></u></div>
<div class="yiv1063698908MsoNormal"><u></u> <u></u></div>
<div class="yiv1063698908MsoNormal">Earl Kagna<u></u><u></u></div>
<div class="yiv1063698908MsoNormal">Victoria BC<u></u><u></u></div>
<div class="yiv1063698908MsoNormal">BJ8, BT7 tri-carb<u></u><u></u></div>
<div class="yiv1063698908MsoNormal"><u></u> <u></u></div>
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<div class="yiv1063698908MsoNormal"><b>From:</b> Healeys <<a shape="rect" ymailto="mailto:healeys-bounces@autox.team.net" href="mailto:healeys-bounces@autox.team.net" target="_blank" rel="noreferrer noopener">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" ymailto="mailto:healeys@autox.team.net" href="mailto:healeys@autox.team.net" target="_blank" rel="noreferrer noopener">healeys@autox.team.net</a>><br clear="none"><b>Subject:</b> [Healeys] Lightened flywheels<u></u><u></u></div>
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<div class="yiv1063698908MsoNormal">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. <u></u><u></u></div>
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<div class="yiv1063698908MsoNormal">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. <u></u><u></u></div>
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<div class="yiv1063698908MsoNormal">Richard <u></u><u></u></div>
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<div class="yiv1063698908gmail_signature" dir="ltr"><font color="#3333ff">Best--Michael</font></div>
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