[Fot] Oil weights?

[MadMarx]

I know that I'm boring you all with telling you again that flat grinding of
my tappets did cure all cam trouble I had before regardless what oil is
used.
All tappets rotate nicely, have an even contact face and the lobes do show
an very even and smooth surface.
The flat tappets because of their flat surface use the whole lobe width
while crowned tappets only have a very thin contact patch.
Even modern cars like a BMW do have dead flat shims on their cams that do
work fine and have no wear.

I really recommend you to use dead flat tappets and you will find that all
trouble with wear will disappear.

If you like I can post photos of my current tappets that have run two racing
seasons and about 3000 mls everyday traffic.

A history note:
I bought a 310 degree cam in year 2007 and installed it with new tappets in
year 2008. After the first race the head gasket went away and I had to open
the engine again. I had a look on the tappets and found 3 of them with
pitting and lobe #7 had a little damage on its tip. The correspond tappet
was scrapped. Then I took all the tappets to the machine shop and ground the
flat, installed them again and since then they are in use and even lobe #7
has no further damage an remains in the same condition as it was. For me a
clear sign that the way with the domed tappets is a dead end for our
engines. The symptom might be cured by the zinc contained in oil but ask
yourself:
Why did a Triumph camshaft last maybe 30 year and modern cams fail after a
short usage, readable in several Triumph forums. I have NOS lifters and they
ARE flat. Why not using them as they came from the factory?

Cheers
Chris


-----Urspr|ngliche Nachricht-----
Von: fot-bounces at autox.team.net [mailto:fot-bounces at autox.team.net] Im
Auftrag von Joe Boruch
Gesendet: Mittwoch, 6. Januar 2010 03:36
An: toodamnfunky at comcast.net
Cc: tr3driver at ca.rr.com; fot at autox.team.net
Betreff: Re: [Fot] Oil weights?

Synthetics like Mobil 1 don't have the zinc and phosphorus needed for the
flat
tappets.  I ran Mobil 1 at one time and did have some cam wear.   I know
others on the list are using Mobil 1.  At one point Chevy was not
warrantying
some motors if Mobil 1 was used.  I changed to Redline for a couple of years
and now am using Joe Gibbs.  The Joe Gibbs is made specifically for flat
tappet motors.  The viscosity to use is based on bearing clearances.  The
Joe
Gibbs oil is expensive (about $10-$12/quart), but so is a new cam or engine.
I also use the Brad Penn break in oil when breaking in new motors.  Joe(B)

---------- Original Message ----------
From: "Jim Gray" <toodamnfunky at comcast.net>
To: "'Rocky Entriken'" <rocky at spitfire4.com>, "'Randall'"
<tr3driver at ca.rr.com>, "''Friends of Triumph'Triumph'" <fot at autox.team.net>
Subject: Re: [Fot] Oil weights?
Date: Mon, 4 Jan 2010 21:28:44 -0700

I thought true synthetics we
bad for our Flat Tappet Motors
?
Jim G


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