Spark advance tuning made simple and quick?

[Tom Sharpe]

Don't listen for knock, get a good vacuum gauge..... Can you hold it steady on a
dyno???

Walter Sherwin wrote:

> Sounds like something that would be of interest to both the GMECM and DIY
> crowds.  Why not maybe paraphrase things in a short E-Mail to the list(s),
> and then later as time permits develop your website and let us know where
> its located when done.  New/different/bizarre ideas are oft the fodder of
> what has not as of yet been conceived.............
>
> Walt.
>
> > Gentlemen, I have an idea that may save tons of time when tuning spark
> > advance. In general, I have a very simple way of manually adjusting spark
> > advance a known amount on the fly while driving. That way, you could set
> the
> > entire SA table to say 25 below 60 KPa and say 5 above 60. Then, you could
> > drive at known RPMs and MAPs and just manually dial up the SA while
> listening
> > or watching for knock counts on a scantool. Once you hear or witness
> knock,
> > just write down where on the RPM vs. MAP map it occurred and how much
> advance
> > you had cranked in and how much you backed out. Then, its just a matter of
> > reburning the chip one time with the results of the run. If there is any
> > interest in this procedure, I'll write it up in a website with digital
> photos.
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