throw a dwell meter on it. check at idle, 1500 rpm,
and 2500 rpm (very briefly!) if there is more than about
2degrees, the dizzy bushings are bad.
the dwell variation will cause timing to wander
art de armond
----- Original Message -----
From: "Charles & Peggy Robinson" <ccrobins@ktc.com>
Cc: "MG List" <mgs@autox.team.net>
Sent: Tuesday, July 08, 2008 10:24 PM
Subject: Re: [Mgs] Unsteady timing
> Whether the timing is jumping around or not it seems obvious that you
> need to advance the timing to near the spec. Don't worry about the diff
> between 600 and 800 rpm. The main need is to get the spark timing near
> where it needs to be.
>
> It sounds like there's too much slop in the dizzy advance mechanism
> presuming the engine RPM is steady at idle. Call Moss.
>
> CR
>
>
>
>
>
> Ron Fine wrote:
>> Paul, The timing chain and gears are new as well as the timing chain
>> tensioner. I tried turning the rotor anti-clockwise. There is a small
>> degree of slop before the spring pressure is felt and when the rotor is
>> released it does not return completely to the clockwise stop. The rotor
>> will move a few degrees counter-clockwise before the spring pressure is
>> felt. There is no sideways movement. Does that sound correct or is
>> there
>> too much play in the rotation?
>>
>> Ron Fine
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