<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">You might get away with that without staking, but you might not. These are clunky castings, variation from head to head is likely. Kas used staking to prevent collapse. My heads were more conservative except for the one that came on the original engine in Peyote, which didn’t hold gaskets reliably. <br class=""><div class="">
<div><b class="">Bill Babcock</b><br class=""><i class="">Beach Bum</i><br class=""><a href="mailto:bill@ponostyle.com" class="">bill@ponostyle.com</a><br class="">https://www.Ponostyle.com<br class=""></div>
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<div><br class=""><blockquote type="cite" class=""><div class="">On Apr 5, 2024, at 5:21 PM, Bob Kramer Gmail via Fot <<a href="mailto:fot@autox.team.net" class="">fot@autox.team.net</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="content-type" content="text/html; charset=utf-8" class=""><div dir="auto" class=""><span style="-webkit-text-size-adjust: auto; font-family: Verdana, Trebuchet, "Trebuchet MS", sans-serif; background-color: rgb(255, 255, 255);" class="">on page 43 of the "triumph preparation handbook</span><br style="-webkit-text-size-adjust: auto; font-family: Verdana, Trebuchet, "Trebuchet MS", sans-serif; background-color: rgb(255, 255, 255);" class=""><span style="-webkit-text-size-adjust: auto; font-family: Verdana, Trebuchet, "Trebuchet MS", sans-serif; background-color: rgb(255, 255, 255);" class="">it says "to achieve the 11.7c.r. mill .150" </span><span style="-webkit-text-size-adjust: auto; font-family: Verdana, Trebuchet, "Trebuchet MS", sans-serif; background-color: rgb(255, 255, 255);" class="">from the stock cylender head face,use the 87mm cyl. & </span><br style="-webkit-text-size-adjust: auto; font-family: Verdana, Trebuchet, "Trebuchet MS", sans-serif; background-color: rgb(255, 255, 255);" class=""><span style="-webkit-text-size-adjust: auto; font-family: Verdana, Trebuchet, "Trebuchet MS", sans-serif; background-color: rgb(255, 255, 255);" class="">piston kit and a steel shim head gasket"</span><div class=""><font face="Verdana, Trebuchet, Trebuchet MS, sans-serif" class=""><span style="-webkit-text-size-adjust: auto; background-color: rgb(255, 255, 255);" class=""><br class=""></span></font></div><div class=""><font face="Verdana, Trebuchet, Trebuchet MS, sans-serif" class=""><span style="-webkit-text-size-adjust: auto; background-color: rgb(255, 255, 255);" class=""><br class=""></span></font></div><div class=""><font face="Verdana, Trebuchet, Trebuchet MS, sans-serif" class=""><span style="-webkit-text-size-adjust: auto; background-color: rgb(255, 255, 255);" class="">A lot of us have done just that, successfully. </span></font></div><div class=""><font face="Verdana, Trebuchet, Trebuchet MS, sans-serif" class=""><span style="-webkit-text-size-adjust: auto; background-color: rgb(255, 255, 255);" class=""><br class=""></span></font></div><div class=""><font face="Verdana, Trebuchet, Trebuchet MS, sans-serif" class=""><span style="-webkit-text-size-adjust: auto; background-color: rgb(255, 255, 255);" class=""><br id="lineBreakAtBeginningOfSignature" class=""></span></font><div dir="ltr" class="">You only get one chance at life, make it a TRIUMPH.</div><div dir="ltr" class=""><br class=""><blockquote type="cite" class="">On Apr 5, 2024, at 9:58 PM, tr4 via Fot <<a href="mailto:fot@autox.team.net" class="">fot@autox.team.net</a>> wrote:<br class=""><br class=""></blockquote></div><blockquote type="cite" class=""><div dir="ltr" class=""><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" class=""><div dir="auto" class="">I have never had to go that far. The problem would be not the combustion chamber but the flat surface would be way too thin and collapse in short order. You would be much better off with popping the piston or go with a slight done to get that level of compression.</div><div dir="auto" class=""><br class=""></div><div dir="auto" class=""><br class=""></div><div dir="auto" class=""><br class=""></div><div id="composer_signature" dir="auto" class=""><div style="font-size:12px;color:#575757" dir="auto" class="">Sent via the Samsung Galaxy S23+ 5G, an AT&T 5G smartphone</div></div><div dir="auto" class=""><br class=""></div><div class=""><br class=""></div><div align="left" dir="auto" style="font-size: 100%;" class=""><div class="">-------- Original message --------</div><div class="">From: GREGORY THOMPSON via Fot <<a href="mailto:fot@autox.team.net" class="">fot@autox.team.net</a>> </div><div class="">Date: 4/5/24 6:36 PM (GMT-06:00) </div><div class="">To: FOT Triumph <<a href="mailto:fot@autox.team.net" class="">fot@autox.team.net</a>> </div><div class="">Subject: [Fot] TR4 head milling </div><div class=""><br class=""></div></div>Has anyone had an issue with breaking into a water jacket on the TR4A head with taking off .150?<div class=""><br class=""></div><div class=""><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px;" class="ydp72b54109yahoo-style-wrap"><div class=""><div class="">Thank you,</div><div class=""><br class=""></div><div class="ydp72b54109signature">Greg Thompson </div></div></div></div><span class="">_______________________________________________</span><br class=""><span class=""><a href="mailto:fot@autox.team.net" class="">fot@autox.team.net</a></span><br class=""><span class=""></span><br class=""><span class=""><a href="http://www.fot-racing.com" class="">http://www.fot-racing.com</a></span><br class=""><span class=""></span><br class=""><span class="">Donate: <a href="http://www.team.net/donate.html" class="">http://www.team.net/donate.html</a></span><br class=""><span class="">Archive: <a href="http://autox.team.net/archive" class="">http://autox.team.net/archive</a> <a href="http://www.team.net/pipermail/fot" class="">http://www.team.net/pipermail/fot</a></span><br class=""><span class="">Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/fot/rkramer56@gmail.com" class="">http://autox.team.net/mailman/options/fot/rkramer56@gmail.com</a></span><br class=""><span class=""></span><br class=""><span class=""></span><br class=""></div></blockquote></div></div>_______________________________________________<br class=""><a href="mailto:fot@autox.team.net" class="">fot@autox.team.net</a><br class=""><br class="">http://www.fot-racing.com<br class=""><br class="">Donate: http://www.team.net/donate.html<br class="">Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot<br class="">Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/bill@ponostyle.com<br class=""><br class=""><br class=""></div></blockquote></div><br class=""></body></html>