[Fot] Distributor gear failure

[MadMarx]

Could it be an oil pressure issue?
When I installed the cam I also installed a new crank with a smaller bearing
clearance.
The oil pressure was pretty good after that.
Cold close 100 psi, hot around 85-90 psi.
I didn't change the relive valve and ran that engine several races with this
high oil pressure.
Maybe the gear failed from too much stress caused by the oil pump?

Had Jack too much oil pressure?

Chris


-----Urspr|ngliche Nachricht-----
Von: fot-bounces at autox.team.net [mailto:fot-bounces at autox.team.net] Im
Auftrag von Larry Young
Gesendet: Montag, 28. Mdrz 2011 18:19
An: fot at autox.team.net
Betreff: Re: [Fot] Distributor gear failure

I have been watching this discussion with interest, because I would like
to know if there is some gear alignment method I don't know about.

I'm familiar with the failure that Jack had and do not believe it was
due to a problem with the blank.  Back in 2005, I purchased two blanks
from the UK and had them ground.  One went into my car and one into
Jack's  Mine never failed.  Jack's failed immediately after he had
another problem with a valve hitting the top of the cylinder liner.  I
believe the force of  the impact was transmitted through the pushrods to
the cam causing deflection and misalignment of the gears.  This occurred
at the 2006 gathering at Hallett.

More recently I have gotten more than 20 blanks from Racestorations in
the UK.  Chris has had the only problem with a gear.  The vendors, Moss,
BPNW, etc., must sell large numbers of cams ground on new blanks, yet we
don't hear of may gear failures.

- Larry Young

On 3/27/2011 4:07 PM, Kramer, Robert wrote:
> Uncle Jack came to the conclusion that the aftermarket blanks had
incorrectly hobbed gears for the distributor drive. I've stayed with
regrounds ever since.
>
> Bob Kramer
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