[DeTomaso] Vacuum advance, ported or manifold, age old question answered
Mikael
mikael_hass at mail.tele.dk
Sun Mar 18 03:10:43 EDT 2012
I found this chart on the web, two map sensors and a throttle position
sensor clearly shows that except at idle, ported and manifold vacuum is the
same. So when you need to decide whether to use ported or manifold vacuum,
let your idle decide. If vacuum advance helps your idle and doesn't make it
hard to start, go directly to manifold. If the additional advance makes
starting hard, use ported vacuum instead.
Now all we need to sort out is the meaning of life...
Vacuum Chart
http://www.gofastforless.com/ignition/vacuum_chart.jpg
Mikael
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