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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Trebuchet MS",sans-serif'>Here’s a pretty thorough article on the subject:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Trebuchet MS",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Trebuchet MS",sans-serif'><a href="https://www.hotrod.com/articles/mopp-0312-solid-vs-hydraulic-lifters/">https://www.hotrod.com/articles/mopp-0312-solid-vs-hydraulic-lifters/</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Trebuchet MS",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Trebuchet MS",sans-serif'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Trebuchet MS",sans-serif'>Bruce Steele<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Trebuchet MS",sans-serif'>Brea, CA<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Trebuchet MS",sans-serif'>1960 BN7<o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Trebuchet MS",sans-serif'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> Healeys [mailto:healeys-bounces@autox.team.net] <b>On Behalf Of </b>Harold Manifold via Healeys<br><b>Sent:</b> Tuesday, June 01, 2021 1:03 PM<br><b>To:</b> Bob Spidell <bspidell@comcast.net>; Healeys <healeys@autox.team.net><br><b>Subject:</b> Re: [Healeys] [OT] Solid Lifters<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Bob,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>This is how I have understood the differences but welcome other points of view. Solid lifters with or without rollers are one component of the valve train which was either designed as a solid lifter or hydraulic lifter valve train. In other words don’t replace hydraulic lifters with solid lifters without changing the cam and push rods and possibly the rocker assembly.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>At normal engine RPM’s there isn’t any significant different between the two type of valve trains but at high engine RPM’s the solid lifter valve train should produce more horsepower (5-10% range) all other things being equal. Solid lifters require much more adjustment and don’t automatically compensate to thermal expansion of engine parts as hydraulic lifters do.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Solid lifters are best suited to race cars or competitions engines that run at high engine RPM’s. The peak horsepower for a solid lifter engine will be higher and at a higher RPM than a hydraulic lifter engine.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Harold<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From: </b><a href="mailto:bspidell@comcast.net">Bob Spidell</a><br><b>Sent: </b>Tuesday, June 1, 2021 9:54 AM<br><b>To: </b><a href="mailto:healeys@autox.team.net">Healeys</a><br><b>Subject: </b>[Healeys] [OT] Solid Lifters<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Listers,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I've heard/read that solid lifters were always/mostly used in OHV cars <o:p></o:p></p><p class=MsoNormal>for performance. Anyone know the theory? Is it just because you can set <o:p></o:p></p><p class=MsoNormal>the lash exactly the way you want it, as opposed to 'squishy' hydraulic <o:p></o:p></p><p class=MsoNormal>lifters?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Also, it seems like solid roller lifters would be best overall, since <o:p></o:p></p><p class=MsoNormal>you can set the lash exactly but, presumably, avoid the potential issues <o:p></o:p></p><p class=MsoNormal>with solid lifters (spalled lobes and lifter faces)?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Bob<o:p></o:p></p><p class=MsoNormal>_______________________________________________<o:p></o:p></p><p class=MsoNormal>Support Team.Net <a href="http://www.team.net/donate.html">http://www.team.net/donate.html</a><o:p></o:p></p><p class=MsoNormal>Suggested annual donation $12.75<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Archive: <a href="http://www.team.net/pipermail/healeys">http://www.team.net/pipermail/healeys</a> <a href="http://autox.team.net/archive">http://autox.team.net/archive</a><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><a href="mailto:Healeys@autox.team.net">Healeys@autox.team.net</a><o:p></o:p></p><p class=MsoNormal><a href="http://autox.team.net/mailman/listinfo/healeys">http://autox.team.net/mailman/listinfo/healeys</a><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/healeys/manifold@telus.net">http://autox.team.net/mailman/options/healeys/manifold@telus.net</a><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>