<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>How do you know that head will give you a compression ratio that high ?</div><div>Have you cc'ed the head?</div><div><br></div><div>I don't think a stock GT6 head will increase the compression ratio of stock TR6 engine THAT much. What am I missing ?</div><div><br></div><div>Cheers,</div><div>Jack Mc<br><br>Sent from my iPad</div><div><br>On Oct 18, 2015, at 9:32 AM, Spitfire Racing <<a href="mailto:Spitfire_Racing@twcny.rr.com">Spitfire_Racing@twcny.rr.com</a>> wrote:<br><br></div><blockquote type="cite"><div><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"><meta name="Generator" content="Microsoft Word 12 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--><div class="WordSection1"><p class="MsoNormal"><span style="font-size:14.0pt">For the past 20 years or so I have had a NOS Circle B 6 cylinder head on a shelf in the parts room. For some reason I assumed it was for a TR-6 and would be ideal as a starting point for an eventual TR-250 project. Must to my disappointment I find it is a Mk2 GT-6 head. Likely it would afford too high a CR sitting on a 2500cc engine in stock condition. <o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:14.0pt">The question is……… Is it unreasonable to think I can open up the combustion chamber to bring the CR down to ~ 10.5:1 using it on a 2500cc application ?<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:14.0pt">Any of you have the combustion chamber volume to achieve this using flat top pistons ??<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p><p class="MsoNormal"><span style="font-size:14.0pt">Anyone out there have done this before? No point in trying to reinvent the wheel. Serial number on head is 517528.<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:14.0pt">Snow on the ground this AM and temps in the 20s has me already in the winter project mode!<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p><p class="MsoNormal"><span style="font-size:14.0pt">Thanks,<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p><p class="MsoNormal"><span style="font-size:14.0pt">Russ Moore<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:14.0pt">Spitfire #49<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p><p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p></div></div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span><a href="mailto:fot@autox.team.net">fot@autox.team.net</a></span><br><span></span><br><span><a href="http://www.fot-racing.com">http://www.fot-racing.com</a></span><br><span></span><br><span>Donate: <a href="http://www.team.net/donate.html">http://www.team.net/donate.html</a></span><br><span>Archive: <a href="http://www.team.net/archive">http://www.team.net/archive</a></span><br><span>Forums: <a href="http://www.team.net/forums">http://www.team.net/forums</a></span><br><span>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/fot/limeyv8@aol.com">http://autox.team.net/mailman/options/fot/limeyv8@aol.com</a></span><br><span></span><br><span></span><br></div></blockquote></body></html>