[Fot] Distributor gear failure

[Tony Drews]

Interesting theory.  Jack did not have too much oil pressure when the 
gear failed.

- Tony

At 11:37 AM 3/28/2011, MadMarx wrote:
>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