<VV> OIL

[Mark Durham]

Seth, it does not matter if a engine is hydraulic or not. The core
issue is the amount of pressure on the cam to lifter faces caused by
spring pressure at the valves. The pressure was mitigated when the
engine designers went to roller cams.
The only difference between a solid lifter and hydraulic is the
hydraulic lifter automatically adjusts for wear on each revolution of
the cam. solid lifters need manual adjustment. So both would need zddp
to bring the levels to what was needed for the engine design.
Mark Durham

Sent from my Windows Phone
From: Sethracer at aol.com
Sent: 1/6/2012 10:02
To: lzdick at comcast.net; virtualvairs at corvair.org
Subject: Re: <VV> OIL
Rich - Virtually all Corvair use Hydraulic lifters. Part of your reference
note says there in no need for it in Hydraulic-lifter motors. Why are folks
 worrying about the ZDDP amounts, if it isn't needed? Or is it just as
important  because we are talking about the lifter to cam lobe face contact,
which is  almost the same with a Hydraulic vs. solid-lifter set-up. I can
understand that  it is not-needed in a roller-cam motor. Any thoughts?

-Seth Emerson


In a message dated 1/5/2012 9:37:46 A.M. Pacific Standard Time,
lzdick at comcast.net writes:

FYI:  The origination of ZDDPlus was by a man who operates a facility  that
evaluates DNA (similar to where samples are sent on your favorite cop TV
program...CSI, etc.).  He compared 'SF' oil with current oils (now 'SM')  and
determined what was missing, chemically...thus the creation of  ZDDPlus.
I've been distributing the product for quite a few  years and it is in every
one of my solid tappet motors (no need for hydraulic  lifters and a no-no'
for catalytic  converters).
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