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RE: distributor shaft runout

To: jswarth1@tampabay.rr.com, 6pack@autox.team.net
Subject: RE: distributor shaft runout
From: "Lumia, John" <jlumia@ball.com>
Date: Mon, 30 Dec 2002 14:09:23 -0700
Jim, been out on vacation so havent read my emails lately.  I took the
entire distributor apart, so all I have is a housing with two dist shaft
bushings and a shaft with the cam block/advance mechanism in place.
With the dist in a vise, I used a dial indicator to measure the
side-to-side play on one of the cam flats, which was 0.0035".  If I take
off the cam block and measure the shaft side-to-side play by itself I
get 0.0025".

John

Date: Fri, 27 Dec 2002 15:21:48 -0500
From: "Jim Swarthout" <jswarth1@tampabay.rr.com>
Subject: RE: distributor shaft runout

John,

How are you measuring it?

Jim

- -----Original Message-----
From: owner-6pack@autox.team.net [ mailto:owner-6pack@autox.team.net
<mailto:owner-6pack@autox.team.net> ] On
Behalf Of Lumia, John
Sent: Friday, December 27, 2002 2:55 PM
To: triumphs; 6pack@autox.team.net
Subject: distributor shaft runout

Listers, still in engine rebuild land.  My distributor shaft has about
.0025" of runout.  Is that alot, or should I think about replacing the
distributor drive shaft bushings?  I dont see a spec in any of the major

books, but I would guess that runout translates into a change in dwell,
and hence ignition timing.  Thanks and happy holidays.  My engine comes
back from the shop today, I basically gave him my wallet and said here,
try not to take all of it!

John Lumia -1976 TR6

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