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Hi Scott,<div><br></div><div>My TR4 has a 1980’s Tilton 7.25” dual clutch setup, that turns out is really an AP racing clutch setup that they were reselling at the time. AP still makes all the parts; seems to be similar to the Quartermaster 7.25 sintered clutches. Try looking at AP racing release bearing options here, along with some engineering diagrams of some options for you:</div><div><a href="https://apracing.com/race-car/metallic-race-clutches/release-mechanism-and-bearings" target="_blank" class="enhancr2_02F51237-A883-463A-BE96-064F755E3115">Release Mechanism and Bearings | AP Racing</a> </div><div><br></div><div>I<br><div><br></div><div id="enhancr2_02F51237-A883-463A-BE96-064F755E3115" class="yahoo-link-enhancr-card yahoo-link-enhancr-cardSize-medium yahoo-link-enhancr-cardType-yenhancr yahoo-link-enhancr-cardCategory-article ymail-preserve-class ymail-preserve-style" style="max-width:400px;font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;" contenteditable="false" data-url="https://apracing.com/race-car/metallic-race-clutches/release-mechanism-and-bearings" data-type="LINK_ENHANCR_ATTACHMENT_TYPE_INLINE" data-category="article" data-embed-url="" data-size="medium"> <a href="https://apracing.com/race-car/metallic-race-clutches/release-mechanism-and-bearings" style="text-decoration:none !important; color: #000 !important;" class="yahoo-enhancr-cardlink" target="_blank" rel="noreferrer"> <table class="card-wrapper yahoo-ignore-table" cellpadding="0" cellspacing="0" border="0" style="max-width:400px;"> <tbody><tr> <td width="400"> <table class="card yahoo-ignore-table" cellpadding="0" cellspacing="0" border="0" width="100%" style="max-width:400px;"> <tbody><tr> <td class="card-primary-image-cell" style="background:#000 url('https://s.yimg.com/lo/api/res/1.2/TGdlQ_z593mIUT8RI0.QTw--~A/Zmk9ZmlsbDt3PTQwMDtoPTIwMDthcHBpZD1pZXh0cmFjdA--/https://apracing.com/_/img/tpl/ap-logo.svg.cf.jpg') no-repeat center center;background-size:cover;height:200px;position:relative;" background="https://s.yimg.com/lo/api/res/1.2/TGdlQ_z593mIUT8RI0.QTw--~A/Zmk9ZmlsbDt3PTQwMDtoPTIwMDthcHBpZD1pZXh0cmFjdA--/https://apracing.com/_/img/tpl/ap-logo.svg.cf.jpg" bgcolor="#000000" valign="top"> <!--[if gte mso 9]><v:rect fill="true" stroke="false" style="width:400px;height:218px;position:absolute;top:0;left:0;"><v:fill type="frame" color="#000000" src="https://s.yimg.com/lo/api/res/1.2/TGdlQ_z593mIUT8RI0.QTw--~A/Zmk9ZmlsbDt3PTQwMDtoPTIwMDthcHBpZD1pZXh0cmFjdA--/https://apracing.com/_/img/tpl/ap-logo.svg.cf.jpg"/></v:rect><![endif]--> <table class="yahoo-ignore-table" cellpadding="0" cellspacing="0" border="0" valign="top" style="width:100%;"> <tbody><tr> <td style="background:transparent url('https://s.yimg.com/nq/storm/assets/enhancrV2/12/overlay-tile.png') repeat left top;height:200px;" background="https://s.yimg.com/nq/storm/assets/enhancrV2/12/overlay-tile.png" bgcolor="transparent" valign="top"> <!--[if gte mso 9]><v:rect fill="true" stroke="false" style="width:400px;height:218px;position:absolute;top:-18px;left:0;"><v:fill type="pattern" color="#000000" src="https://s.yimg.com/nq/storm/assets/enhancrV2/12/overlay-tile.png"/><v:textbox inset="0,0,20px,0"><![endif]--> <table class="yahoo-ignore-table" height="185" style="width:100%;height:185px;min-height:185px;"> <tbody><tr> <td class="card-richInfo2" style="text-align:left;text-align:left;padding:15px 0 0 15px;vertical-align:top;"> </td> <td class="card-actions" style="text-align:right;padding:15px 15px 0 0;vertical-align:top;"> <div class="card-share-container"></div> </td> </tr> </tbody></table> <!--[if gte mso 9]></v:textbox></v:rect><![endif]--> </td> </tr> </tbody></table> </td> </tr> <tr> <td> <table class="card-info yahoo-ignore-table" align="center" cellpadding="0" cellspacing="0" border="0" style="background:#fff;position:relative;z-index:2;width:95%;max-width:380px;border:1px solid #e0e4e9;border-bottom:3px solid #000000;margin-top:-40px;margin-left:auto;margin-right:auto;"> <tbody><tr> <td style="background-color:#ffffff;padding:16px 0 16px 12px;vertical-align:top;"> </td> <td style="vertical-align:middle;padding:16px 12px;width:99%;"> <h2 class="card-title" style="font-size: 16px; line-height:19px; margin:0 0 4px 0;font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;">Release Mechanism and Bearings | AP Racing</h2> <p class="card-description" style="font-size:11px;line-height:15px;color:#999;">AP Racing, the Coventry, UK-based company is a key supplier and the leading manufacturer of performance brake and clutch systems for road and race cars.</p> </td> <td style="text-align:right;padding:16px 12px 16px 0;"> </td> </tr> </tbody></table> </td> </tr> </tbody></table> </td> </tr> </tbody></table> </a> </div><div><br></div> hope that helps!</div><div><br></div><div>Dave Gott</div><div><br><br><br><a href="https://overview.mail.yahoo.com/?.src=iOS">Sent from Yahoo Mail for iPhone</a><br><br><p class="yahoo-quoted-begin" style="font-size: 15px; color: #715FFA; padding-top: 15px; margin-top: 0">On Sunday, August 7, 2022, 5:08 PM, Scott Janzen via Fot <fot@autox.team.net> wrote:</p><blockquote class="iosymail"><div id="yiv1509368634"><div>I’m trying to switch from the aluminum flywheel/stock size clutch to a Quartermaster steel flywheel and 7.25” clutch. The challenge is the throwout bearing - I’ve included photos of the current one I use and a new replacement I picked up. The QM pressure plate needs something smaller in diameter than the new replacement. If I could find one that’s more like what I have, it would work - ideally the contact surface is even closer to 2” in diameter.<div class="yiv1509368634">The photos below indicate that the profiles are different, and the profile of the old one results in a smaller contact diameter.<br class="yiv1509368634"><div class="yiv1509368634"><br class="yiv1509368634"></div><div class="yiv1509368634">QM recommends a radiused contact surface.</div><div class="yiv1509368634"><br class="yiv1509368634"></div><div class="yiv1509368634">Any thoughts on where to source one like the one I have? I could convert to hydraulic, but would prefer not to as I’m guessing that’s not a simple bolt-in.</div><div class="yiv1509368634"><br class="yiv1509368634"></div><div class="yiv1509368634">Scott</div><div class="yiv1509368634"><div><div class="yiv1509368634"><div class="yiv1509368634"><br class="yiv1509368634"><img id="yiv1509368634F82C88F5-BCB3-45B4-B9C6-6453326D5EEC" src="cid:VplWBx2ehsQoGYnSG8v9" yahoo_partid="1.2.2" class="yiv1509368634"><br class="yiv1509368634"><br class="yiv1509368634"><br class="yiv1509368634"><img id="yiv1509368634991E6B4A-5958-42A9-AEE9-017F6B76D72D" src="cid:Db617MotYxpjWITsICBQ" yahoo_partid="1.2.3" class="yiv1509368634"><br class="yiv1509368634"><br class="yiv1509368634"><br class="yiv1509368634"><img id="yiv15093686346A09621E-C33E-44E3-8FEB-8EC45C8FFED7" src="cid:sAP6ATp7tvftIbldaHd3" yahoo_partid="1.2.4" class="yiv1509368634"><br class="yiv1509368634"><br class="yiv1509368634"><br class="yiv1509368634"><img id="yiv1509368634D598D394-E8B0-4AE7-8A5C-D18EB1E3E296" src="cid:I9lv25dwQeQXEKzMkU0k" yahoo_partid="1.2.5" class="yiv1509368634"><br class="yiv1509368634"><br class="yiv1509368634"><br class="yiv1509368634"><img id="yiv150936863403742651-6D30-49DF-A99B-95A6AE4CB705" src="cid:QXzlmUMGM4o5aysAxM6v" yahoo_partid="1.2.6" class="yiv1509368634"><br class="yiv1509368634"><br class="yiv1509368634">Sent from my iPhone</div></div></div><br class="yiv1509368634"></div></div></div></div>_______________________________________________<br><a ymailto="mailto:fot@autox.team.net" href="mailto:fot@autox.team.net">fot@autox.team.net</a><br><br><a href="http://www.fot-racing.com" target="_blank">http://www.fot-racing.com</a><br><br>Donate: <a href="http://www.team.net/donate.html" target="_blank">http://www.team.net/donate.html</a><br>Archive: <a href="http://autox.team.net/archive " target="_blank">http://autox.team.net/archive </a><a href="http://www.team.net/pipermail/fot" target="_blank">http://www.team.net/pipermail/fot</a><br>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/fot/triumphsix@yahoo.com" target="_blank">http://autox.team.net/mailman/options/fot/triumphsix@yahoo.com</a><br><br><br><blockquote></blockquote></blockquote></div>
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