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>From what I=E2=80=99ve read flat tappet cams aren=E2=80=99t really flat =
and neither are the lifters. The cam is ground with a slight angle on =
its surface and the lifter is slightly convex. Both enhance the spinning =
of the lifter on the cam. Many (I know I use to) likely assume the =
lifter stays relatively stationary and =E2=80=9Cslides=E2=80=9D on the =
cam based on the normal description. One product that I=E2=80=99ve =
heard about is GM EOS (engine oil supplement). This is the link (Summit) =
and the write up. http://www.summitracing.com/parts/nal-88862586 =
=E2=80=9C Protect your engine with a bottle of proven Chevrolet =
Performance E.O.S. additive to keep your engine running smoothly and =
efficiently. This Engine Oil Supplement is recommended to be installed =
before firing a new engine equipped with a Chevrolet Performance =
camshaft. I used this when I broke in a new cam. In addition to the =
2,000-2,500 RPM break in process I set the idle at about 1,000 RPM for =
the first 1,000 miles.
As far as the diesel oils go (Rotella etc.) I=E2=80=99ve heard that they =
too have reduced ZDDP also now that those vehicle are running some form =
of CATs. Maybe oil should be labeled like food so we know specifically =
what is in it. What I find interesting is I=E2=80=99ve never seen an =
additive bottle that stated not to use it in a modern (CAT) car. Yet =
they are requiring it removed from oil to protect the CAT??? Hummm... . =
The oil additive debate seems to follow the same course like the need =
for supplement vitamins.
From: Tod Brown via Tigers=20
Sent: Saturday, November 14, 2015 2:19 PM
To: tigers@autox.team.net=20
Subject: Re: [Tigers] Motor Oil
My understanding is that the most important issue with flat-tappet =
engines and lubrication is that
the initial break-in is crucial to longevity. For the first 1500-2000 =
miles of operation it is extremely=20
important that the proper level of zinc additive (i.e. zddp) be provided =
so that cam surfaces, rings
and cylinder bores be allowed to seat themselves. Newer oils are too =
slick to allow the necessary
scuffing to take place, whereas the presence of zddp provides enough =
friction for the seating to=20
take place. Once past the initial break-in, zddp is no longer as =
necessary. I have not seen a definitive
statement as to whether zddp is necessary after break-in but many =
sources recommend that an
oil with higher levels of zddp be used.=20
I found the discussion at =
http://www.hotrod.com/how-to/engine/ccrp-0702-break-in-new-cam/
to be helpful. Note that, at the end of the article, there are some =
recommendations for oils with
higher levels of zddp, usually used in diesel engines.=20
Cheers,
Tod Brown
B382002384LRXFE
TAC #864
-------------------------------------------------------------------------=
-------
_______________________________________________
tigers@autox.team.net
Archive: http://www.team.net/archive
Unsubscribe: =
http://autox.team.net/mailman/options/tigers/atwittsend@verizon.net
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<HTML><HEAD>
<META content=3D"text/html; charset=3Dutf-8" =
http-equiv=3Dcontent-type></HEAD>
<BODY dir=3Dltr bgColor=3D#ffffff text=3D#000000>
<DIV dir=3Dltr>
<DIV style=3D"FONT-SIZE: 12pt; FONT-FAMILY: 'Calibri'; COLOR: #000000">
<DIV>From what I=E2=80=99ve read flat tappet cams aren=E2=80=99t really =
flat and neither are the=20
lifters. The cam is ground with a slight angle on its surface and the =
lifter is=20
slightly convex. Both enhance the spinning of the lifter on the cam. =
Many (I=20
know I use to) likely assume the lifter stays relatively stationary and =
=E2=80=9Cslides=E2=80=9D=20
on the cam based on the normal description. One product that =
I=E2=80=99ve heard=20
about is GM EOS (engine oil supplement). This is the link (Summit) and =
the write=20
up. <A title=3Dhttp://www.summitracing.com/parts/nal-88862586=20
href=3D"http://www.summitracing.com/parts/nal-88862586";>http://www.summit=
racing.com/parts/nal-88862586</A> =20
=E2=80=9C <FONT face=3D"Times New Roman">Protect your engine with a =
bottle of proven=20
Chevrolet Performance E.O.S. additive to keep your engine running =
smoothly and=20
efficiently. This Engine Oil Supplement is recommended to be installed =
<U>before=20
firing a new engine equipped with a Chevrolet Performance =
camshaft</U>. =20
</FONT><FONT face=3D"Times New Roman">I used this when I broke in a new =
cam. In=20
addition to the 2,000-2,500 RPM break in process I set the idle at about =
1,000=20
RPM for the first 1,000 miles.</FONT></DIV>
<DIV><FONT face=3D"Times New Roman"></FONT> </DIV>
<DIV><FONT face=3D"Times New Roman">As far as the diesel oils go =
(Rotella etc.)=20
I=E2=80=99ve heard that they too have reduced ZDDP also now that those =
vehicle are=20
running some form of CATs. Maybe oil should be labeled like food so we =
know=20
specifically what is in it. What I find interesting is I=E2=80=99ve =
never seen an=20
additive bottle that stated not to use it in a modern (CAT) car. =
Yet they=20
are requiring it removed from oil to protect the CAT??? Hummm... =
. =20
The oil additive debate seems to follow the same course like the need =
for=20
supplement vitamins.</FONT></DIV>
<DIV=20
style=3D'FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: =
"Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; =
DISPLAY: inline'>
<DIV style=3D"FONT: 10pt tahoma">
<DIV> </DIV>
<DIV style=3D"BACKGROUND: #f5f5f5">
<DIV style=3D"font-color: black"><B>From:</B> <A =
title=3Dtigers@autox.team.net=20
href=3D"mailto:tigers@autox.team.net";>Tod Brown via Tigers</A> </DIV>
<DIV><B>Sent:</B> Saturday, November 14, 2015 2:19 PM</DIV>
<DIV><B>To:</B> <A title=3Dtigers@autox.team.net=20
href=3D"mailto:tigers@autox.team.net";>tigers@autox.team.net</A> </DIV>
<DIV><B>Subject:</B> Re: [Tigers] Motor Oil</DIV></DIV></DIV>
<DIV> </DIV></DIV>
<DIV=20
style=3D'FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: =
"Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; =
DISPLAY: inline'><FONT=20
face=3DArial>My understanding is that the most important issue with =
flat-tappet=20
engines and lubrication is that<BR><FONT face=3DArial>the initial =
br<FONT=20
face=3DArial>e<FONT face=3DArial>ak-in is crucial to longevity. For the=20
first</FONT></FONT></FONT> 1500-2000 miles <FONT face=3DArial>of =
operation it is=20
extremely <BR><FONT face=3DArial>important that the proper level of zinc =
additive=20
(i.e. zddp) be<FONT face=3DArial> <FONT face=3DArial>provided so that =
cam=20
surfaces<FONT face=3DArial>, rings<BR><FONT face=3DArial>and cylinder =
bores be=20
allowed to seat themselves. Newer oils are too slick to allow the=20
necessary<BR><FONT face=3DArial>scuffing to take place, whereas the =
presence of=20
zddp provides enough friction for the seating to <BR><FONT =
face=3DArial>take=20
place. Once past the initial break-in, zddp is no longer as necessary. I =
have=20
not seen a definitive<BR><FONT face=3DArial>statement as to whether zddp =
is=20
necessary after break-in but many sources recommend that an<BR><FONT=20
face=3DArial>oil with higher levels of zddp be used. <BR><BR><FONT =
face=3DArial>I=20
found the discussion at <A=20
href=3D"http://www.hotrod.com/how-to/engine/ccrp-0702-break-in-new-cam/";>=
<A=20
class=3Dmoz-txt-link-freetext=20
href=3D"http://www.hotrod.com/how-to/engine/ccrp-0702-break-in-new-cam/";>=
http://www.hotrod.com/how-to/engine/ccrp-0702-break-in-new-cam/</A></A><B=
R><FONT=20
face=3DArial>to be helpful. Note that<FONT face=3DArial>, at the end of =
the article,=20
there are some recommendations for oils with<BR><FONT =
face=3DArial>higher levels=20
of zddp, usually used in diesel engines. <BR><BR><FONT=20
face=3DArial>Cheers,<BR><BR><FONT face=3DArial>Tod Brown<BR><FONT=20
face=3DArial>B382002384LRXFE<BR><FONT face=3DArial>TAC=20
#864</FONT><BR></FONT></FONT></FONT></FONT></FONT></FONT></FONT></FONT></=
FONT></FONT></FONT></FONT></FONT></FONT></FONT></FONT></FONT></FONT>
<P>
<HR>
_______________________________________________<BR><BR>tigers@autox.team.=
net<BR><BR>Donate:=20
http://www.team.net/forums<BR>Unsubscribe:=20
http://autox.team.net/mailman/options/tigers/atwittsend@verizon.net<BR><B=
R><BR></DIV></DIV></DIV></BODY></HTML>
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