Jack :
I'm not sure if I said one of those things that "just didn't sound right"
<g>, but I think Barry glossed over the point that most if not all auto
vacuum advance systems do NOT advance the spark at idle (unless the engine
is overheated). Efficiency at idle is not a concern (it's 0 by definition),
and a retarded spark makes for a smoother, more stable idle speed. Also,
for most engines, the centrifugal advance is no longer working at idle, so
the idle timing needs to be retarded for the slowest possible speed, not
just the nominal idle speed.
Randall
59 TR3A daily driver
> -----Original Message-----
> From: owner-triumphs@autox.team.net
> [mailto:owner-triumphs@autox.team.net]On Behalf Of Jack Brooks
> Sent: Thursday, October 14, 1999 2:23 PM
> To: Triumph List
> Subject: Vacuum advance - Clarification
>
>
>
> A few days ago I was following a few posts about the way a
> vacuum advance
> works. Some of what was said, just didn't sound right.
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