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Here=E2=80=99s a pretty thorough article on the subject:
=20
https://www.hotrod.com/articles/mopp-0312-solid-vs-hydraulic-lifters/
=20
=20
Bruce Steele
Brea, CA
1960 BN7
=20
From: Healeys [mailto:healeys-bounces@autox.team.net] On Behalf Of =
Harold Manifold via Healeys
Sent: Tuesday, June 01, 2021 1:03 PM
To: Bob Spidell <bspidell@comcast.net>; Healeys <healeys@autox.team.net>
Subject: Re: [Healeys] [OT] Solid Lifters
=20
Bob,
=20
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=E2=80=99t replace hydraulic =
lifters with solid lifters without changing the cam and push rods and =
possibly the rocker assembly.
=20
At normal engine RPM=E2=80=99s there isn=E2=80=99t any significant =
different between the two type of valve trains but at high engine =
RPM=E2=80=99s 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=E2=80=99t automatically compensate =
to thermal expansion of engine parts as hydraulic lifters do.
=20
Solid lifters are best suited to race cars or competitions engines that =
run at high engine RPM=E2=80=99s. The peak horsepower for a solid lifter =
engine will be higher and at a higher RPM than a hydraulic lifter =
engine.
=20
Harold
=20
Sent: Tuesday, June 1, 2021 9:54 AM
Subject: [Healeys] [OT] Solid Lifters
=20
Listers,
=20
I've heard/read that solid lifters were always/mostly used in OHV cars=20
for performance. Anyone know the theory? Is it just because you can set=20
the lash exactly the way you want it, as opposed to 'squishy' hydraulic=20
lifters?
=20
Also, it seems like solid roller lifters would be best overall, since=20
you can set the lash exactly but, presumably, avoid the potential issues =
with solid lifters (spalled lobes and lifter faces)?
=20
Bob
_______________________________________________
=20
Archive: http://www.team.net/pipermail/healeys =
http://autox.team.net/archive
=20
http://autox.team.net/mailman/listinfo/healeys
=20
http://autox.team.net/mailman/options/healeys/manifold@telus.net
=20
=20
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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3D"#954F72"><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:12.0pt;font-family:"Trebuchet =
MS",sans-serif'>Here=E2=80=99s a pretty thorough article on the =
subject:<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:12.0pt;font-family:"Trebuchet =
MS",sans-serif'><o:p> </o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:12.0pt;font-family:"Trebuchet MS",sans-serif'><a =
href=3D"https://www.hotrod.com/articles/mopp-0312-solid-vs-hydraulic-lift=
ers/">https://www.hotrod.com/articles/mopp-0312-solid-vs-hydraulic-lifter=
s/</a><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:12.0pt;font-family:"Trebuchet =
MS",sans-serif'><o:p> </o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:12.0pt;font-family:"Trebuchet =
MS",sans-serif'><o:p> </o:p></span></p><div><p =
class=3DMsoNormal><span style=3D'font-size:12.0pt;font-family:"Trebuchet =
MS",sans-serif'>Bruce Steele<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:12.0pt;font-family:"Trebuchet =
MS",sans-serif'>Brea, CA<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:12.0pt;font-family:"Trebuchet MS",sans-serif'>1960 =
BN7<o:p></o:p></span></p></div><p class=3DMsoNormal><span =
style=3D'font-size:12.0pt;font-family:"Trebuchet =
MS",sans-serif'><o:p> </o:p></span></p><div><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><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=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal>Bob,<o:p></o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>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=E2=80=99t 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=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>At normal =
engine RPM=E2=80=99s there isn=E2=80=99t any significant different =
between the two type of valve trains but at high engine RPM=E2=80=99s =
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=E2=80=99t automatically compensate to thermal =
expansion of engine parts as hydraulic lifters do.<o:p></o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>Solid =
lifters are best suited to race cars or competitions engines that run at =
high engine RPM=E2=80=99s. 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=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal>Harold<o:p></o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b>From: </b><a =
href=3D"mailto:bspidell@comcast.net";>Bob Spidell</a><br><b>Sent: =
</b>Tuesday, June 1, 2021 9:54 AM<br><b>To: </b><a =
href=3D"mailto:healeys@autox.team.net";>Healeys</a><br><b>Subject: =
</b>[Healeys] [OT] Solid Lifters<o:p></o:p></p></div><p =
class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal>Listers,<o:p></o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>I've =
heard/read that solid lifters were always/mostly used in OHV cars =
<o:p></o:p></p><p class=3DMsoNormal>for performance. Anyone know the =
theory? Is it just because you can set <o:p></o:p></p><p =
class=3DMsoNormal>the lash exactly the way you want it, as opposed to =
'squishy' hydraulic <o:p></o:p></p><p =
class=3DMsoNormal>lifters?<o:p></o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>Also, it =
seems like solid roller lifters would be best overall, since =
<o:p></o:p></p><p class=3DMsoNormal>you can set the lash exactly but, =
presumably, avoid the potential issues <o:p></o:p></p><p =
class=3DMsoNormal>with solid lifters (spalled lobes and lifter =
faces)?<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal>Bob<o:p></o:p></p><p =
class=3DMsoNormal>_______________________________________________<o:p></o=
:p></p><p class=3DMsoNormal>Support Team.Net <a =
href=3D"http://www.team.net/donate.html";>http://www.team.net/donate.html<=
/a><o:p></o:p></p><p class=3DMsoNormal>Suggested annual donation =
$12.75<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p =
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href=3D"http://www.team.net/pipermail/healeys";>http://www.team.net/piperm=
ail/healeys</a> <a =
href=3D"http://autox.team.net/archive";>http://autox.team.net/archive</a><=
o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal><a =
href=3D"mailto:Healeys@autox.team.net";>Healeys@autox.team.net</a><o:p></o=
:p></p><p class=3DMsoNormal><a =
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class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal>Unsubscribe/Manage: <a =
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