[Fot] Lifter Reconditioning

[MadMarx]

My opinion is, that the clearance lifter to wall does compensate missalignment
of lifter and cam surface.
The domed crown was created to enforce rotation in combination with a cam
taper.

Evidence for this is, that nowadays cams die very quickly.


----- Original Message -----
From: "Larry Young" <cartravel at pobox.com>
To: "Bill Babcock" <Billb at bnj.com>
Cc: "FOT Triumph" <fot at autox.team.net>
Sent: Sunday, March 16, 2008 12:35 AM
Subject: Re: [Fot] Lifter Reconditioning


> Apparently, they discovered somewhere back about 1940 that in practice
> you can't get perfect alignment, so if you make everything flat, you'll
> probably end up with contact on the edge.  For one thing, you'll get
> some misalignment because there is clearance between the lifter and the
> lifter bore, so the lifter can tilt slightly. This is when they came up
> with the idea to put a slight crown on the lifter.