If you get pinging/pinking when under load it is an indication that the
centrifugal advance may be too high, which can be caused by stretched
springs allowing max advance at too low an rpm. An adjustable timing light
is really useful for checking/plotting the advance curve and vacuum advance.
By contrast, pinging/pinking on a light throttle can mean no more than the
timing is set too advanced.
Clausager has a comparison list for Gold Seal or other pukka replacement
engines. For example, and to pluck one out at random, he states that a 48G
393 is a rebuilt 18GB low compression with manual gearbox.
PaulH.
http://freespace.virgin.net/paul.hunt1/
(or if that URL doesn't work try )
(http://194.168.54.52/paul.hunt1)
-----Original Message-----
From: Max Heim <mvheim@studiolimage.com>
To: MG List <mgs@autox.team.net>
Date: 23 August 1999 04:38
Subject: Re: ignition timing
>I have been operating on the assumption that I have a HC engine, I always
>use 92 octane, and I keep it at 14 degrees. [The reason for the
>disclaimer is that it's a BHM engine number ("Gold Seal" rebuilt) out of
>a wreck, and I can't find a configuration reference for the number
>series.] A while back I had a little pinging problem after my timing
>light broke, but I got a new one, retimed it, fixed various distributor
>advance failures, and since then no problems.
>
>Larry Colen had this to say:
>
>>What advance do people run on High Compression (9.7:1) MGB motors
>>running the 92 octane fuel? I think that I might be getting a little
>>pinging in warm weather, up steep hills at 12 degrees BTDC set at idle.
>>That's 2 degrees retarded from the specified 14.
>>
>> Larry
>>
>>
>>--
>> Rome did not create a great empire by having meetings; they did it by
>>
>>killing all those who opposed them.
>>lrc@red4est.com http://www.red4est.com/lrc
>>
>
>
>--
>
>Max Heim
>'66 MGB GHN3L76149
>If you're near Mountain View, CA,
>it's the red one with the silver bootlid.
>
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