<font color='black' size='2' face='Arial, Helvetica, sans-serif'>I u<font size="2">se old crank flange as a jig.<br>
Glen<br>
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<div style="font-family:arial,helvetica;font-size:10pt;color:black">-----Original Message-----<br>
From: John Styduhar via Fot <fot@autox.team.net><br>
To: Steve Yott <tr4@wi.rr.com><br>
Cc: FOT <fot@autox.team.net><br>
Sent: Thu, Jun 22, 2017 6:09 pm<br>
Subject: Re: [Fot] TR4 ARP Flywheel Bolts Question<br>
<br>
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<div class="aolmail_gmail_default" style="font-size:small">What would be the best approach to drilling a second dowel hole in the flywheel? Should you index to the second hole in the stock TR3/4 crank?</div>
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<div class="aolmail_gmail_quote">On Mon, Jun 5, 2017 at 6:22 PM, Steve Yott via Fot <span dir="ltr"><<a target="_blank" rel="noopener noreferrer" href="mailto:fot@autox.team.net">fot@autox.team.net</a>></span> wrote:<br>
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<div class="aolmail_MsoNormal">Properly made and installed that would be an good solution. Issue is that if they are not sized properly and they should have a t-shape and be counter sunk they can cause even worse failure.<u></u><u></u></div>
<div class="aolmail_MsoNormal"><u></u> <u></u></div>
<div class="aolmail_MsoNormal">The right bolt used with the proper washer has a very large surface area and the bolt itself is shouldered resulting in a pretty strong install.<u></u><u></u></div>
<div class="aolmail_MsoNormal"><u></u> <u></u></div>
<div class="aolmail_MsoNormal">The next best thing to do IMHO is to install a second dowel pin. The real purpose of the bolt is to hold the flywheel onto the crank but the main strength is the counter sunk flywheel over the face of the crankshaft and the dowels holding the rotation forces. This way if the bolts should break you have two dowels which will prevent the flywheel from flying in an egg shape and destroying everything in its path.<u></u><u></u></div>
<div class="aolmail_MsoNormal"><u></u> <u></u></div>
<div class="aolmail_MsoNormal">Now the absolute best thing is to not use an aluminum flywheel! There is a reason they are not allowed in Europe….. Buy a steel flywheel and use 6 to 8 bolts then most of the issues are gone. <u></u><u></u></div>
<div class="aolmail_MsoNormal"><u></u> <u></u></div>
<div class="aolmail_MsoNormal">IMHO<u></u><u></u></div>
<div class="aolmail_MsoNormal"><u></u> <u></u></div>
<div class="aolmail_MsoNormal">Steve Yott<u></u><u></u></div>
<div class="aolmail_MsoNormal"><u></u> <u></u></div>
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<div class="aolmail_MsoNormal"><span><b>From:</b> Scott Janzen [mailto:<a target="_blank" rel="noopener noreferrer" href="mailto:sjanzen@me.com">sjanzen@me.com</a>] <br>
<b>Sent:</b> Monday, June 05, 2017 3:28 PM<br>
<b>To:</b> Barr, Scott <sbarr@McCarty-Law.com><br>
</span><b>Cc:</b> <a target="_blank" rel="noopener noreferrer" href="mailto:timmmurphh@gmail.com">timmmurphh@gmail.com</a>; Steve Yott <<a target="_blank" rel="noopener noreferrer" href="mailto:tr4@wi.rr.com">tr4@wi.rr.com</a>>; STEPHEN BOROWSKI <<a target="_blank" rel="noopener noreferrer" href="mailto:biznzman@pacbell.net">biznzman@pacbell.net</a>>; FOT <<a target="_blank" rel="noopener noreferrer" href="mailto:fot@autox.team.net">fot@autox.team.net</a>><span><br>
<b>Subject:</b> Re: [Fot] TR4 ARP Flywheel Bolts Question<u></u><u></u></span></div>
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<div class="aolmail_MsoNormal"><u></u> <u></u></div>
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<div class="aolmail_MsoNormal">Don't you guys use steel inserts in those flywheel holes?<br>
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Sent from my iPhone<span style="font-size:12.0pt"><u></u><u></u></span></div>
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<div class="aolmail_MsoNormal" style="margin-bottom:12.0pt"><br>
<span>On Jun 5, 2017, at 7:55 AM, Barr, Scott via Fot <<a target="_blank" rel="noopener noreferrer" href="mailto:fot@autox.team.net">fot@autox.team.net</a>> wrote:<u></u><u></u></span></div>
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<div class="aolmail_MsoNormal"><span style="color:#1f497d">This is what it looks like if you forget to chamfer the flywheel holes to clear the radius under the head.</span> <u></u><u></u></div>
<div class="aolmail_MsoNormal"> <u></u><u></u></div>
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<div class="aolmail_MsoNormal"><image001.jpg><u></u><u></u></div>
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<div class="aolmail_MsoNormal"><span style="color:#1f497d"> </span><u></u><u></u></div>
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<div class="aolmail_MsoNormal"><b>From:</b> Fot [<a target="_blank" rel="noopener noreferrer" href="mailto:fot-bounces@autox.team.net">mailto:fot-bounces@autox.<wbr>team.net</a>] <b>On Behalf Of </b>timmmurphh--- via Fot<br>
<b>Sent:</b> Sunday, June 04, 2017 5:53 PM<br>
<b>To:</b> 'Steve Yott' <<a target="_blank" rel="noopener noreferrer" href="mailto:tr4@wi.rr.com">tr4@wi.rr.com</a>>; 'STEPHEN BOROWSKI' <<a target="_blank" rel="noopener noreferrer" href="mailto:biznzman@pacbell.net">biznzman@pacbell.net</a>>; <a target="_blank" rel="noopener noreferrer" href="mailto:fot@autox.team.net">fot@autox.team.net</a><br>
<b>Subject:</b> Re: [Fot] TR4 ARP Flywheel Bolts Question<u></u><u></u></div>
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<div class="aolmail_MsoNormal"> <u></u><u></u></div>
<div class="aolmail_MsoNormal">Thanks for the clarification Steve, that makes sense.<u></u><u></u></div>
<div class="aolmail_MsoNormal"> <u></u><u></u></div>
<div class="aolmail_MsoNormal">Tim<u></u><u></u></div>
<div class="aolmail_MsoNormal"> <u></u><u></u></div>
<div class="aolmail_MsoNormal"><a name="aolmail_m_-2833010786318998955__MailEndCompose"> </a><u></u><u></u></div>
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<div class="aolmail_MsoNormal"><b>From:</b> Steve Yott [<a target="_blank" rel="noopener noreferrer" href="mailto:tr4@wi.rr.com">mailto:tr4@wi.rr.com</a>] <br>
<b>Sent:</b> Sunday, June 4, 2017 4:56 PM<br>
<b>To:</b> <a target="_blank" rel="noopener noreferrer" href="mailto:timmmurphh@gmail.com">timmmurphh@gmail.com</a>; 'STEPHEN BOROWSKI' <<a target="_blank" rel="noopener noreferrer" href="mailto:biznzman@pacbell.net">biznzman@pacbell.net</a>><br>
<b>Subject:</b> RE: [Fot] TR4 ARP Flywheel Bolts Question<u></u><u></u></div>
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<div class="aolmail_MsoNormal"> <u></u><u></u></div>
<div class="aolmail_MsoNormal">The reason they state to not use washers is they are afraid that the washers used will (1) not be hard enough and will compress under the bolt head and (2) all ARP bolts have very liberal radii between the head and shank. If there is a tight fitting washer this would be strain on this radius and could break the head.<u></u><u></u></div>
<div class="aolmail_MsoNormal"> <u></u><u></u></div>
<div class="aolmail_MsoNormal">The 7/16” ARP bolts used on Chevy flywheels is what I fit to TR’6, late Spitfires and modified TR4 cranks. These bolts come with the special washers to use with them. I have used a proper washer under the 3/8” ARP bolts many times with no problems using a correct washer. You can also use an ARP crown wheel bolt for the same purpose and these come with proper washers.<u></u><u></u></div>
<div class="aolmail_MsoNormal"> <u></u><u></u></div>
<div class="aolmail_MsoNormal">Steve Yott <u></u><u></u></div>
<div class="aolmail_MsoNormal"> <u></u><u></u></div>
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<div class="aolmail_MsoNormal"><b>From:</b> Fot [<a target="_blank" rel="noopener noreferrer" href="mailto:fot-bounces@autox.team.net">mailto:fot-bounces@autox.<wbr>team.net</a>] <b>On Behalf Of </b>timmmurphh--- via Fot<br>
<b>Sent:</b> Sunday, June 04, 2017 1:59 PM<br>
<b>To:</b> 'STEPHEN BOROWSKI' <<a target="_blank" rel="noopener noreferrer" href="mailto:biznzman@pacbell.net">biznzman@pacbell.net</a>>; <a target="_blank" rel="noopener noreferrer" href="mailto:fot@autox.team.net">fot@autox.team.net</a><br>
<b>Subject:</b> Re: [Fot] TR4 ARP Flywheel Bolts Question<u></u><u></u></div>
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<div class="aolmail_MsoNormal"> <u></u><u></u></div>
<div class="aolmail_MsoNormal">FWIW<u></u><u></u></div>
<div class="aolmail_MsoNormal"> <u></u><u></u></div>
<div class="aolmail_MsoNormal">I just got a set of ARP 206-2802 flywheel bolts from Pegasus for the TR4. They are for “BMC A series”. The instruction specifically says, “DO NOT USE ANY WAHERS”, yes, all in caps for emphasis! They further state that ARP will not be responsible for failures is washers are used. The instructions also say, “Make sure there is an adequate chamfer under the bolt holes on the flywheel to clear the radius under the head of the bolt.” Torque is 55 Ft-Lb with specified lubricants on the threads.<u></u><u></u></div>
<div class="aolmail_MsoNormal"> <u></u><u></u></div>
<div class="aolmail_MsoNormal">I’ve never had that much good luck grinding the ends of bolts and still having it square so as not to start it cocked and runing the female threads. Maybe it’s just me<span style="font-family:"Segoe UI Emoji",sans-serif">😊</span><u></u><u></u></div>
<div class="aolmail_MsoNormal"> <u></u><u></u></div>
<div class="aolmail_MsoNormal">Tim<u></u><u></u></div>
<div class="aolmail_MsoNormal"> <u></u><u></u></div>
<div class="aolmail_MsoNormal"> <u></u><u></u></div>
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<div class="aolmail_MsoNormal"><b>From:</b> Fot [<a target="_blank" rel="noopener noreferrer" href="mailto:fot-bounces@autox.team.net">mailto:fot-bounces@autox.<wbr>team.net</a>] <b>On Behalf Of </b>STEPHEN BOROWSKI via Fot<br>
<b>Sent:</b> Friday, June 2, 2017 3:28 PM<br>
<b>To:</b> FOT List <<a target="_blank" rel="noopener noreferrer" href="mailto:fot@autox.team.net">fot@autox.team.net</a>><br>
<b>Subject:</b> [Fot] TR4 ARP Flywheel Bolts Question<u></u><u></u></div>
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<div class="aolmail_MsoNormal"> <u></u><u></u></div>
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<div class="aolmail_MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black">Does anyone have experience using the ARP flywheel bolts sold by Moss and others?</span><u></u><u></u></div>
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<div id="aolmail_m_-2833010786318998955yui_3_16_0_ym19_1_1496435068370_3241">
<div class="aolmail_MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black">I understand that you may have to shorten the bolt or it breaks the rear seal???</span><u></u><u></u></div>
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<div id="aolmail_m_-2833010786318998955yui_3_16_0_ym19_1_1496435068370_3257">
<div class="aolmail_MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black">Are they supposed to have a washer or not?</span><u></u><u></u></div>
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<div class="aolmail_MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black"> </span><u></u><u></u></div>
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<div class="aolmail_MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black">Thxs. Steve</span><u></u><u></u></div>
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