[Healeys] [OT] Solid Lifters

[Bruce Steele]

Here’s a pretty thorough article on the subject:

 

https://www.hotrod.com/articles/mopp-0312-solid-vs-hydraulic-lifters/

 

 

Bruce Steele

Brea, CA

1960 BN7

 

From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of Harold Manifold via Healeys
Sent: Tuesday, June 01, 2021 1:03 PM
To: Bob Spidell <bspidell at comcast.net>; Healeys <healeys at autox.team.net>
Subject: Re: [Healeys] [OT] Solid Lifters

 

Bob,

 

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.

 

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.

 

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.

 

Harold

 

From: Bob Spidell <mailto:bspidell at comcast.net> 
Sent: Tuesday, June 1, 2021 9:54 AM
To: Healeys <mailto:healeys at autox.team.net> 
Subject: [Healeys] [OT] Solid Lifters

 

Listers,

 

I've heard/read that solid lifters were always/mostly used in OHV cars 

for performance. Anyone know the theory? Is it just because you can set 

the lash exactly the way you want it, as opposed to 'squishy' hydraulic 

lifters?

 

Also, it seems like solid roller lifters would be best overall, since 

you can set the lash exactly but, presumably, avoid the potential issues 

with solid lifters (spalled lobes and lifter faces)?

 

Bob

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