What's more, some cars have the steering wheel on the left and some on the
right!
-----Original Message-----
From: Rick Morrison <gofastmg@juno.com>
To: paul.hunt1@virgin.net <paul.hunt1@virgin.net>
Cc: mgs@autox.team.net <mgs@autox.team.net>
Date: 08 January 1999 03:34
Subject: Re: What IS Vacuum advance?
>
>On Thu, 7 Jan 1999 19:47:35 -0000 "Paul Hunt" <paul.hunt1@virgin.net>
>writes:
>>There are two types of vacuum advance - what might loosely be called
>>'British' advance and 'North American' advance.
>>
>>The Britsh advance is non-existant at idle, maximum under cruising rpm
>>at
>>low throttle openings, and negligible at high throttle openings.
>>
>>The NA advance is maximum at idle, otherwise it is much the same as
>>British
>>advance.
>>
>>British vacuum is taken off the carb right by a throttle disc, NA
>>vacuum is
>>taken off the inlet manifold.
>>
>>Even so, British tuning instructions also state that the vacuum line
>>should
>>be removed and plugged for setting dynamic timing even though the
>>vacuum at
>>tuning rpm is negligble.
>>
>>PaulH.
>
>Hmmm.
> I guess that means both my MG's aren't British.
> Both have the vacuum port on the manifold and both have max vacuum(read
>advance) at Idle
> Funny, I could have sworn that the BMHIT certificates said they came
>from England.
>
>Rick Morrison
>72 MGBGT
>74 Midget
>
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