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Don't know if you know it, Michael, but you 'started' a long thread on
the Forum about this (Steve Gerow re-posted a link he got from you):
http://www.britishcarforum.com/bcf/showthread.php?105991-Very-interesting-very-long-blog-posting-racing-oil-and-zinc
This guy's research, while impressive, has been disputed here:
http://www.corvetteforum.com/forums/c3-tech-performance/3266544-zinc-myth-and-test-data-on-a-dozen-more-oils.html
This is of major interest to me, as I'll be rebuilding my BJ8's engine
in the near future. I've run it on off-the-shelf dino 20W-50--Castrol,
Chevron (mostly) and Valvoline--for almost 120K miles so it will be
interesting to see what the internals look like now (also want to see
what deposits, if any, the PCV valve has caused in the intake system).
#2 has low compression and we'll see if cam lobe wear is the cause.
Agree with Chris on the cam lube. I bought a bunch of GM EOS assembly
lube way back when and I'm tempted to pour a bottle down the pushrod
tubes before first startup. Thoughts (of course, I'll use assembly lube
on the cam and all moving surfaces)?
Also, I'm leaning towards buying a cam from Denis Welch, which they say
is 'gun-drilled' which, I presume, means the cam is lubricated
internally and supplies a stream of oil to the lobes. I'll probably also
go with their bucket lifters which have a hole on the bottom to supply
yet more oil to the lifter-lobe surfaces.
I'm interested in hearing any and all thoughts and experiences on engine
assembly and break-in. I'm going all-in on this rebuild--it'll be the
last for this car (I hope)--and my dad wants a friend of his who owns a
racing engine shop to do the major work ($$$).
Bob
On 8/27/2016 2:31 AM, Chris Dimmock wrote:
> Interesting, but he completely missed the point that a fundamental
> part of most flat tappet engine (BMC A, B, or C series) builds that I
> know of, is liberal application of your favorite "cam lube" on the cam
> lobes, followers etc.
> Which is usually a molybdenum disulphide based grease based.
> E.g.
> http://iskycams.com/cart/index.php?main_page=product_info&products_id=1809
> So the break in/ run in oil is less of an issue in that first 5 - 10
> seconds of start up, because the cam lube is on the cam before the oil
> pump even starts turning...
>
> Best
> Chris
>
> On 27 Aug 2016, at 11:38 AM, Michael Salter <michaelsalter@gmail.com
>
>> Talking of oil here is an interesting article...VERY LONG... on
>> lifter wear that is opening some eyes!!!
>> http://speedtalk.com/forum/viewtopic.php?f=1&t=32471
>>
>> Certainly has me wondering...
>> M
>>
>> On Fri, Aug 26, 2016 at 3:12 PM, Bob Spidell <bspidell@comcast.net
>>
>> We never talk about oil, so ....
>>
>> Anybody use this stuff?
>>
>>
>> https://www.amazon.com/Kendall-1057267-Performance-20W-50-Titanium/dp/B004RNSO2M
>>
>> <https://www.amazon.com/Kendall-1057267-Performance-20W-50-Titanium/dp/B004RNSO2M>
>>
>> This is the best price I've seen on (I assume it's) decent 20W-50
>> (and I just bought 3 cases of Valvoline @ $4.99/qt + shipping).
>>
>> Bob
>>
>> --------------------------------
>> Bob Spidell - San Jose, CA
>>
>>
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<p>Don't know if you know it, Michael, but you 'started' a long
thread on the Forum about this (Steve Gerow re-posted a link he
got from you):</p>
<p><a class="moz-txt-link-freetext"
href="http://www.britishcarforum.com/bcf/showthread.php?105991-Very-interesting-very-long-blog-posting-racing-oil-and-zinc";>http://www.britishcarforum.com/bcf/showthread.php?105991-Very-interesting-very-long-blog-posting-racing-oil-and-zinc</a><br>
</p>
<p>This guy's research, while impressive, has been disputed here:</p>
<p>
<a class="moz-txt-link-freetext"
href="http://www.corvetteforum.com/forums/c3-tech-performance/3266544-zinc-myth-and-test-data-on-a-dozen-more-oils.html";>http://www.corvetteforum.com/forums/c3-tech-performance/3266544-zinc-myth-and-test-data-on-a-dozen-more-oils.html</a></p>
<p>This is of major interest to me, as I'll be rebuilding my BJ8's
engine in the near future. I've run it on off-the-shelf dino
20W-50--Castrol, Chevron (mostly) and Valvoline--for almost 120K
miles so it will be interesting to see what the internals look
like now (also want to see what deposits, if any, the PCV valve
has caused in the intake system). #2 has low compression and
we'll see if cam lobe wear is the cause.<br>
</p>
<p>Agree with Chris on the cam lube. I bought a bunch of GM EOS
assembly lube way back when and I'm tempted to pour a bottle down
the pushrod tubes before first startup. Thoughts (of course, I'll
use assembly lube on the cam and all moving surfaces)?</p>
<p>Also, I'm leaning towards buying a cam from Denis Welch, which
they say is 'gun-drilled' which, I presume, means the cam is
lubricated internally and supplies a stream of oil to the lobes.
I'll probably also go with their bucket lifters which have a hole
on the bottom to supply yet more oil to the lifter-lobe surfaces.</p>
<p>I'm interested in hearing any and all thoughts and experiences on
engine assembly and break-in. I'm going all-in on this
rebuild--it'll be the last for this car (I hope)--and my dad wants
a friend of his who owns a racing engine shop to do the major work
($$$).<br>
</p>
<p>Bob<br>
</p>
<br>
<div class="moz-cite-prefix">On 8/27/2016 2:31 AM, Chris Dimmock
wrote:<br>
</div>
<blockquote
cite="mid:9D5768DF-31E2-4C0D-B3A0-E287F72A5F3D@gmail.com"
type="cite">
<meta http-equiv="content-type" content="text/html;
charset=windows-1252">
<div><span></span></div>
<div>
<div>Interesting, but he completely missed the point that a
fundamental part of most flat tappet engine (BMC A, B, or C
series) builds that I know of, is liberal application of your
favorite "cam lube" on the cam lobes, followers etc. </div>
<div>Which is usually a molybdenum disulphide based grease
based. </div>
<div>E.g. <a moz-do-not-send="true"
href="http://iskycams.com/cart/index.php?main_page=product_info&products_id=1809";>http://iskycams.com/cart/index.php?main_page=product_info&products_id=1809</a></div>
<div>So the break in/ run in oil is less of an issue in that
first 5 - 10 seconds of start up, because the cam lube is on
the cam before the oil pump even starts turning... <br>
<br>
<div>Best</div>
</div>
<div id="AppleMailSignature">Chris </div>
<div><br>
On 27 Aug 2016, at 11:38 AM, Michael Salter <<a
moz-do-not-send="true"
href="mailto:michaelsalter@gmail.com";>michaelsalter@gmail.com</a>>
wrote:<br>
<br>
</div>
<blockquote type="cite">
<div>
<div dir="ltr">
<div class="gmail_default" style="font-family:comic sans
ms,sans-serif;font-size:small">Talking of oil here is an
interesting article...VERY LONG... on lifter wear that
is opening some eyes!!!<br>
<a moz-do-not-send="true"
href="http://speedtalk.com/forum/viewtopic.php?f=1&t=32471";
target="_blank">http://speedtalk.com/forum/viewtopic.php?f=1&t=32471</a><br>
<br>
</div>
<div class="gmail_default" style="font-family:comic sans
ms,sans-serif;font-size:small">Certainly has me
wondering...<br>
</div>
<div class="gmail_default" style="font-family:comic sans
ms,sans-serif;font-size:small">M<br>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Fri, Aug 26, 2016 at 3:12 PM,
Bob Spidell <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:bspidell@comcast.net";
target="_blank">bspidell@comcast.net</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div
style="font-family:Arial;font-size:12pt;color:#000000">
<div>We never talk about oil, so ....</div>
<div><br>
</div>
<div>Anybody use this stuff?</div>
<div><br>
</div>
<div><a moz-do-not-send="true"
href="https://www.amazon.com/Kendall-1057267-Performance-20W-50-Titanium/dp/B004RNSO2M";
target="_blank">https://www.amazon.com/<wbr>Kendall-1057267-Performance-<wbr>20W-50-Titanium/dp/B004RNSO2M</a></div>
<div><br>
</div>
<div>This is the best price I've seen on (I assume
it's) decent 20W-50 (and I just bought 3 cases
of Valvoline @ $4.99/qt + shipping).</div>
<div><br>
</div>
<div>Bob</div>
<div><br>
</div>
<div><span
name="x"></span>------------------------------<wbr>--<br>
Bob Spidell - San Jose, CA<span name="x"></span><br>
</div>
<div><br>
</div>
</div>
</div>
<br>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</blockquote>
<br>
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