Glenn, the first 30 seconds and then the first 5 minutes of new engine
(or cam) start up are the critical cam life determining time. Inadequate
or poor quality cam lube, trying to build oil pressure by turning with
the starter rather than fully pressurizing he system first, high ratio
rocker arms and excessive valve spring pressure all will wipe cam
lobes. The other factor is inital run-in time and procedure. Three
years ago we spent almost a year researching oils and zinc issue. We
spoke with Comp Cams, Joe Gibbs, Mobil, Brad Penn and others.Finally
settled on Brad Penn. They have a good selection of grades plus they
have break-in oil. We build a lot of engines and this has worked for us.
Commercial content - Brad Penn break-in oil is $6/qt. All other weights
are $5/qt Ted
On 10/31/2011 12:47 PM, Glenn Franco wrote:
> Hi All
>
> I have torn down 4 TR6 engines in the past 4 months all with wiped out
> cams.
> The latest was a performance reground cam with low miles and 2 lobes
> severely worn.
>
> I know this has been a topic/thread in the past but wondered what if
> any Zinc Additives are out there.
>
> For the rebuilds, I used either Brad Penn 30wt break in oil, Valvoline
> Racing oil (20w50) and Rotella ( 15w40 highest in zinc of the diesel
> oils)
>
> As these engines age their owners are going to start changing their
> own oil, Most have switched back to Castrol 20w50.
> As I understand that formula has changed to the low zinc for emissions.
> I'm running it in my engine as well.
>
> I'm now very concerned and would like to get this under control with
> an additive.
>
> Any Suggestions?
> Thanks in Advance
> Glenn Franco
> Too Many TR's
>
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--
Ted Schumacher
tedtsimx@bright.net
http://www.tsimportedautomotive.com
108 S. Jefferson St.
Pandora, Ohio, USA 45877
Fax: 419.384.3272 (24 Hrs.)
Phone: 800.543.6648 (US& Canada)
Tech/ Gen. Information/ Worldwide: 419.384.3022
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