[Tigers] Cam Thrust Plate

[Joe Brown]

I think you are on to something with the oil slot.  I'm going to try out a
newer style of thrust plate that has an ear to one side with a groove cut
into the back side of it.
[image: image.png]

When the new thrust plate is installed the ear covers up a small hole that
leads to the passageway for the distributor shaft.
[image: image.png]
This hole currently has a plug in it since the original thrust plate could
not utilize the extra oil.  I searched for info on the web and there is a
lot of discussion in various Ford forums about whether or not to knock the
plug out when installing the newer style of thrust plate.  There doesn't
seem to be any agreement about what to do.

It would seem to me that if I knock out the plug, there will be a little
bit of oil flow from the distributor area through the groove in the thrust
plate where it will be deposited between the thrust plate and the face of
the camshaft.  The Edelbrock timing gear might be able to pick up some of
this extra oil.

So, I'm looking for opinions.  Knock out the little plug or leave it in
there?

Thanks,
Joe Brown


On Tue, Jan 29, 2019 at 8:58 PM Tom Witt via Tigers <tigers at autox.team.net>
wrote:

> Perhaps they assume the plate is worn and replacing it will help to
> prevent cam “walk” (which can possibly cause erratic ignition timing
> issues). Or maybe there is a thickness difference from early SBF engines
> and later engines? Perhaps the oiling slots were modified for better
> oiling??? Anyway, these are the only things I can think of that MIGHT be
> the reason. Hopefully someone has a more definitive answer.
>
> *From:* Joe Brown via Tigers <tigers at autox.team.net>
> *Sent:* Tuesday, January 29, 2019 2:38 PM
> *To:* Tigers Den <Tigers at autox.team.net>
> *Subject:* [Tigers] Cam Thrust Plate
>
> Hi,
>
> I bought an Edelbrock 7820 timing chain set to go on my 260 and the
> instructions say to remove the original cam thrust plate and spacer and
> replace it with Ford thrust plate  # C9OZ-6269-A.  These instructions do
> not explain WHY the plate needs to be replaced.  I called Edelbrock and the
> guy I spoke to was useless.  I pointed out that the Ford part number they
> listed appears to be obsolete and his response was to send me a link to
> Ebay where an old one is for sale.  I've found some other vendors that have
> replacements for this number.  Does anybody know why a different thrust
> plate would be required for the Edelbrock timing chain set?
>
> Thanks,
> Joe Brown
>
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