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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>I would be EXTREMELY careful with too high a spring pressure. Been there, done that! If you go by all the STD calculations, theories and what you ‘should have’ texts. It will tell you need HIGH springs pressures. Destroyed a couple of cams that way! I just went back to springs with about the seat pressures you are looking at. Haven’t had an issue with cams/cam lobes since.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='color:#7030A0'>"You can Make a Small Fortune From Motor Racing. As long as You Started With A Lage Fortune!"<o:p></o:p></span></b></p><p class=MsoNormal><span style='color:#1F497D'>Kind Regards<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Peter Vucinic<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>TR4 - TR7 V8 - Spitfire MkII<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>_______________________________________________<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;color:#1F497D'><a href="mailto:fot@autox.team.net"><span style='color:blue'>fot@autox.team.net</span></a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;color:#1F497D'><a href="http://www.fot-racing.com/"><span style='color:blue'>http://www.fot-racing.com</span></a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;color:#1F497D'>Donate: <a href="http://www.team.net/donate.html"><span style='color:blue'>http://www.team.net/donate.html</span></a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;color:#1F497D'>Archive: <a href="http://www.team.net/archive"><span style='color:blue'>http://www.team.net/archive</span></a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;color:#1F497D'>Forums: <a href="http://www.team.net/forums"><span style='color:blue'>http://www.team.net/forums</span></a><o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal style='margin-left:36.0pt'><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Fot [mailto:fot-bounces@autox.team.net] <b>On Behalf Of </b>timmmurphh--- via Fot<br><b>Sent:</b> Wednesday, 15 February 2017 6:56 AM<br><b>To:</b> fot@autox.team.net<br><b>Subject:</b> [Fot] valve spring pressure on TR4 race engine<o:p></o:p></span></p></div></div><p class=MsoNormal style='margin-left:36.0pt'><o:p> </o:p></p><p class=MsoNormal style='margin-left:36.0pt'>I have 85 lbs. pressure on the intake valve with the valve closed and it sits at a height of 1.655 inches. At .400 lift, I have 190 lbs. of pressure. We only run to 6000 RPM with the gearing we have and the engine we have. The valve springs are double springs and the machine shop says they are all about the same, very consistent. What pressures would be recommended? The machine shop thinks these pressures are light for a 6000 RPM engine. Any advice will be appreciated. Thanks.<o:p></o:p></p><p class=MsoNormal style='margin-left:36.0pt'><o:p> </o:p></p><p class=MsoNormal style='margin-left:36.0pt'>Tim Murphy<o:p></o:p></p><p class=MsoNormal style='margin-left:36.0pt'>1961 TR4 #317 BRG<o:p></o:p></p></div></body></html>